├── 9447 CTF 2015 └── The real flag finder │ ├── flagFinderRedux │ ├── redux.rr2 │ └── solve.py ├── Atenea CTF ├── Counter │ ├── Counter-d060ed1dd46ee60319b7013d2b65f186.exe │ └── README.md ├── Crackme- if you can... │ └── README.md ├── Saint Seiya │ ├── README.md │ ├── Saint_Seiya-3db53d5cf73c57e698c0687738404478.exe │ └── dissas.PNG ├── Spear Phising... Can you catch me │ └── README.md └── WannaCry │ ├── README.md │ └── wannacry.exe ├── CSAW 2016 └── Gametime │ ├── Captura.PNG │ ├── README.md │ └── gametime.exe ├── Defcamp CTF Qualifications 2015 └── entry-language-100 │ ├── r100 │ ├── r100patch │ ├── r100patch.rr2 │ └── solve.py ├── Flare-On 2018 └── Ultimate Minesweeper │ ├── Captura.PNG │ ├── README.md │ ├── Solve │ └── Program.cs │ └── UltimateMinesweeper.exe ├── H4CK1T CTF 2016 └── Crypt00perator │ ├── crypt0_0perator.py │ └── crypt0_0perator_56e0a9f07f54b3634ab5cc2b30e5b29e.exe ├── Hack The Box ├── Find The Easy Pass │ ├── EasyPass.exe │ ├── README.md │ ├── output.PNG │ └── solve.7z └── Impossible Password │ ├── README.md │ ├── impossible_password.bin │ └── out.png ├── Hacklu CTF 2018 └── Baby Reverse │ ├── estimate.py │ └── public │ ├── chall │ └── notes ├── HoneyCON CTF 2018 ├── Basic Conditional Decision │ └── rev3 ├── Brute Me │ ├── rev4 │ └── solve.py └── Ultra Secure Bank Login │ └── reto5 ├── INSTRUO CTF 2018 └── Tez Bano Tez │ ├── rev150 │ ├── rev150.rr2 │ ├── rev_patch │ └── solve.py ├── InCTF 2018 └── Decoy │ ├── Decoy.exe │ └── README.md ├── LICENSE ├── Malware Data Science └── ch1 │ ├── README.md │ ├── fakepdfmalware.exe │ ├── fakeword.exe │ └── ircbot.exe ├── Navarra Lan Party CTF 2018 ├── In time │ ├── in-time │ ├── intime.rr2 │ └── solve_intime.py └── Key is the key │ ├── keyisthekey.bin │ ├── keyisthekey_patch │ └── reverse.py ├── PatataCTF └── Angry Potato │ ├── angry-potato │ └── reverse.py ├── Practical Malware Analysis Lab ├── Lab01-01 │ ├── Lab01-01.dll │ ├── Lab01-01.exe │ ├── README.md │ └── recon-lab1-1.py └── Lab01-02 │ ├── Lab01-02.exe │ ├── README.md │ ├── Unpacked_Lab01-02.exe │ └── recon-lab1-2.py ├── README.md ├── State machine └── Ret0 │ ├── Ret0.zip │ └── keygen.py ├── X-MAS CTF 2019 ├── LAST_XMAS └── main ├── babyrevjohnson └── main ├── basic.asm ├── entropy ├── entropy └── solver.py ├── r2con2018 ├── disqualified │ ├── disqualified │ ├── disqualified.rr2 │ └── solve.py ├── forceme │ ├── forceme │ ├── reverse-brute.py │ └── reverse.py ├── psv │ ├── psv │ └── solve.py └── scrabble │ ├── reverse-brute.py │ ├── reverse.py │ └── scrabble └── whats-a-rune ├── chall.py ├── main-chall.go └── the /9447 CTF 2015/The real flag finder/flagFinderRedux: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/9447 CTF 2015/The real flag finder/flagFinderRedux -------------------------------------------------------------------------------- /9447 CTF 2015/The real flag finder/redux.rr2: -------------------------------------------------------------------------------- 1 | #!/usr/bin/rarun2 2 | program=./flagFinderRedux 3 | arg1="AAAA" 4 | 5 | -------------------------------------------------------------------------------- /9447 CTF 2015/The real flag finder/solve.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | 3 | r = r2pipe.open("./flagFinderRedux") 4 | r.cmd('e dbg.profile=redux.rr2') 5 | r.cmd('doo') # initially you are debugging rarun2 6 | r.cmd("db 0x00400729") #We realize with debugging that the flag is store at this memory address in stack... 7 | r.cmd('dc') 8 | flag = r.cmdj('pxj@rax') 9 | chrlist = [] 10 | for x in range(len(flag)): 11 | chrlist.append(chr(int(flag[x]))) 12 | if chr(int(flag[x])) == "}": 13 | print (chr(27) + "[0;33m" + "\tFlag: "+"".join(chrlist)+chr(27) + "[0m") 14 | break 15 | -------------------------------------------------------------------------------- /Atenea CTF/Counter/Counter-d060ed1dd46ee60319b7013d2b65f186.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Atenea CTF/Counter/Counter-d060ed1dd46ee60319b7013d2b65f186.exe -------------------------------------------------------------------------------- /Atenea CTF/Counter/README.md: -------------------------------------------------------------------------------- 1 | Packed .NET dnspy is your friend :) 2 | -------------------------------------------------------------------------------- /Atenea CTF/Crackme- if you can.../README.md: -------------------------------------------------------------------------------- 1 | # TL;TR 2 | Challenge
3 | We start finding interesting strings at first. After we realize that the program receive 2 arguments looking at stack memory 3.
4 | So if we put 2 arguments jle conditional doesn’t jump. Next we need path program to jnz conditional. Cool, after we enter in a function that retrieve the name of our computer in memory stack ebp-204h.
5 | We see a loop that compare our first argument with the name of our computer if it is correct go to ret and continue the program, if not exit. Next we see other important function because in this, compare the second argument and do some aritmetics operations for calculate the password. So the second argument is the password to solve this baby challenge. So --> crypt0.exe name_pc password.
6 | When our eip register retrieve cmp instruction to compare, we realize that the value of edx register is 0x4e so this is the correct first byte of password and ecx register is just our first char of second argument.
7 | So in the second lap we see that our second argument was just “N” or 0x4e and don’t put anything more so our ecx register is 0x0, but edx register is the second byte of password great!! We win then :)
8 | flag{TRY_BRO} 9 | 10 | 11 | -------------------------------------------------------------------------------- /Atenea CTF/Saint Seiya/README.md: -------------------------------------------------------------------------------- 1 | ![texto cualquiera por si no carga la imagen](https://github.com/naivenom/reversing-list/blob/master/Atenea%20CTF/Saint%20Seiya/dissas.PNG) 2 | -------------------------------------------------------------------------------- /Atenea CTF/Saint Seiya/Saint_Seiya-3db53d5cf73c57e698c0687738404478.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Atenea CTF/Saint Seiya/Saint_Seiya-3db53d5cf73c57e698c0687738404478.exe -------------------------------------------------------------------------------- /Atenea CTF/Saint Seiya/dissas.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Atenea CTF/Saint Seiya/dissas.PNG -------------------------------------------------------------------------------- /Atenea CTF/Spear Phising... Can you catch me/README.md: -------------------------------------------------------------------------------- 1 | Windows Defender is your friend :/ 2 | Challenge 3 | -------------------------------------------------------------------------------- /Atenea CTF/WannaCry/README.md: -------------------------------------------------------------------------------- 1 | Baby challenge :) 2 | -------------------------------------------------------------------------------- /Atenea CTF/WannaCry/wannacry.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Atenea CTF/WannaCry/wannacry.exe -------------------------------------------------------------------------------- /CSAW 2016/Gametime/Captura.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/CSAW 2016/Gametime/Captura.PNG -------------------------------------------------------------------------------- /CSAW 2016/Gametime/README.md: -------------------------------------------------------------------------------- 1 | # TL;TR 2 | We just need after playing the game is patch instruction to jz when we got failed and jumping to the success instead. Also it would be nice set a breakpoint after the conditional jump. 3 | ![texto cualquiera por si no carga la imagen](https://github.com/naivenom/reversing-list/blob/master/CSAW%202016/Gametime/Captura.PNG) 4 | -------------------------------------------------------------------------------- /CSAW 2016/Gametime/gametime.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/CSAW 2016/Gametime/gametime.exe -------------------------------------------------------------------------------- /Defcamp CTF Qualifications 2015/entry-language-100/r100: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Defcamp CTF Qualifications 2015/entry-language-100/r100 -------------------------------------------------------------------------------- /Defcamp CTF Qualifications 2015/entry-language-100/r100patch: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Defcamp CTF Qualifications 2015/entry-language-100/r100patch -------------------------------------------------------------------------------- /Defcamp CTF Qualifications 2015/entry-language-100/r100patch.rr2: -------------------------------------------------------------------------------- 1 | #!/usr/bin/rarun2 2 | program=./r100patch 3 | stdin="Code_" 4 | stdout= 5 | -------------------------------------------------------------------------------- /Defcamp CTF Qualifications 2015/entry-language-100/solve.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | 3 | r = r2pipe.open("./r100patch") 4 | r.cmd('e dbg.profile=r100patch.rr2') 5 | r.cmd('doo') # initially you are debugging rarun2 6 | r.cmd('db 0x00400771') 7 | r.cmd('dc') 8 | #print r.cmd('drj') 9 | def step(): 10 | r.cmd('ds') 11 | r.cmd('sr rip') 12 | while True: 13 | list_ = [] 14 | disass = [] 15 | try: 16 | if r.cmdj('drj')["rip"] == 4196212: 17 | break 18 | except TypeError: 19 | print("No more RIP instruction, breaking loop") 20 | break 21 | print (chr(27) + "[1;36m" + "[+] STAGE 1 - SOLVE: Lenght of password is 11 = 0xb" + chr(27) + "[0m") 22 | while True: 23 | instruction = r.cmdj('pdj 1')[0] 24 | try: 25 | if r.cmdj('drj')["rip"] == 4196212: 26 | key = r.cmdj('drj')["rax"] 27 | print(key) 28 | password = key-1 29 | print(r.cmd('drj')) 30 | print (chr(27) + "[0;33m" + "\tSUB Operation EDX-EAX and flag value: " +chr(password)+chr(27) + "[0m") 31 | list_.append(chr(password)) 32 | except TypeError: 33 | print("No more RIP instruction, breaking loop") 34 | break 35 | if instruction['type'] == 'cmp eax, 1': 36 | if r.cmdj('drj')['rax'] == 1: 37 | continue 38 | else: 39 | break 40 | step() 41 | -------------------------------------------------------------------------------- /Flare-On 2018/Ultimate Minesweeper/Captura.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Flare-On 2018/Ultimate Minesweeper/Captura.PNG -------------------------------------------------------------------------------- /Flare-On 2018/Ultimate Minesweeper/README.md: -------------------------------------------------------------------------------- 1 | ![texto cualquiera por si no carga la imagen](https://github.com/naivenom/reversing-list/blob/master/Flare-On%202018/Ultimate%20Minesweeper/Captura.PNG) 2 | -------------------------------------------------------------------------------- /Flare-On 2018/Ultimate Minesweeper/Solve/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Ultimate_Minesweeper 8 | { 9 | class Program 10 | { 11 | static void Main(string[] args) 12 | { 13 | uint grid = 30u; //VALLOC_NODE_LIMIT 14 | uint VALLOC_TYPE_HEADER_PAGE = 4294966400u; 15 | uint VALLOC_TYPE_HEADER_POOL = 4294966657u; 16 | uint VALLOC_TYPE_HEADER_RESERVED = 4294967026u; 17 | uint DeriveVallocType(uint r, uint c) 18 | { 19 | return ~(r * grid + c); 20 | } 21 | uint[] VALLOC_TYPES = new uint[3] 22 | { 23 | VALLOC_TYPE_HEADER_PAGE, 24 | VALLOC_TYPE_HEADER_POOL, 25 | VALLOC_TYPE_HEADER_RESERVED 26 | }; 27 | for (uint num = 0u; num < grid; num += 1u) 28 | { 29 | for (uint num2 = 0u; num2 < grid; num2 += 1u) 30 | { 31 | bool flag = true; 32 | uint row = num + 1u; 33 | uint colm = num2 + 1u; 34 | if (VALLOC_TYPES.Contains(DeriveVallocType(row, colm))) 35 | { 36 | flag = false; 37 | Console.WriteLine("FLAG--> Row:" + row + " Column:" + colm); 38 | Console.ReadLine(); 39 | } 40 | } 41 | } 42 | } 43 | } 44 | } 45 | -------------------------------------------------------------------------------- /Flare-On 2018/Ultimate Minesweeper/UltimateMinesweeper.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Flare-On 2018/Ultimate Minesweeper/UltimateMinesweeper.exe -------------------------------------------------------------------------------- /H4CK1T CTF 2016/Crypt00perator/crypt0_0perator.py: -------------------------------------------------------------------------------- 1 | def main_(): 2 | ea = idc.ScreenEA() 3 | print "0x%x %s" % (ea,ea) 4 | 5 | 6 | def debug_(addr): 7 | idc.RunTo(BeginEA()) 8 | idc.AddBpt(addr) #breakpoint 004016D5 9 | idc.GetDebuggerEvent(WFNE_SUSP,-1) 10 | idc.RunTo(addr) 11 | 12 | 13 | def help_(): 14 | print("""Functions: 15 | debug_(addr) 16 | recon() 17 | solve()""") 18 | 19 | def recon(): 20 | stdin = "abcdefghijklmnopqrstuvwxyz01234567890{}" 21 | GetDebuggerEvent(WFNE_SUSP, -1) 22 | rax = idc.GetRegValue('RAX') 23 | print("[+] Value of RAX is: %s "%rax) 24 | cipher = idc.GetString(rax) 25 | print("[+] Value of Substitution cipher is: %s "%cipher) 26 | sc = Strings() 27 | for s in sc: 28 | if s.ea == 4661280: 29 | print "%x: len=%d type=%d --> '%s'" % (s.ea, s.length, s.type, str(s)) 30 | key = str(s) 31 | print("[+] Value of Key: %s"%key) 32 | flag = '' 33 | for i in key: 34 | try: 35 | flag += stdin[cipher.index(i)] 36 | print(flag) 37 | except ValueError: 38 | pass 39 | def solve(): 40 | stdin = "abcdefghijklmnopqrstuvwxyz01234567890{}" 41 | cipher = "fedcba`onmlkjihwvutsrqp_~}76543210?>|z" 42 | key = "o3dl6s|41a42344d110746d574e35c2f77ab6>3z" 43 | flag = '' 44 | for i in key: 45 | flag += stdin[cipher.index(i)] 46 | print(flag) 47 | 48 | if __name__ == '__main__': 49 | #main_() 50 | #debug_(addr) 51 | #recon() 52 | #solve() 53 | help_() 54 | -------------------------------------------------------------------------------- /H4CK1T CTF 2016/Crypt00perator/crypt0_0perator_56e0a9f07f54b3634ab5cc2b30e5b29e.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/H4CK1T CTF 2016/Crypt00perator/crypt0_0perator_56e0a9f07f54b3634ab5cc2b30e5b29e.exe -------------------------------------------------------------------------------- /Hack The Box/Find The Easy Pass/EasyPass.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hack The Box/Find The Easy Pass/EasyPass.exe -------------------------------------------------------------------------------- /Hack The Box/Find The Easy Pass/README.md: -------------------------------------------------------------------------------- 1 | # Output 2 | ![texto cualquiera por si no carga la imagen](https://github.com/naivenom/reversing-list/blob/master/Hack%20The%20Box/Find%20The%20Easy%20Pass/output.PNG) 3 | 4 | # Solve 5 | 

 6 | [+] Value of EDX: 
 7 | 0xAAAAAAA
 8 | [+] Your password is: AAAAAAA
 9 |
10 | -------------------------------------------------------------------------------- /Hack The Box/Find The Easy Pass/output.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hack The Box/Find The Easy Pass/output.PNG -------------------------------------------------------------------------------- /Hack The Box/Find The Easy Pass/solve.7z: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hack The Box/Find The Easy Pass/solve.7z -------------------------------------------------------------------------------- /Hack The Box/Impossible Password/README.md: -------------------------------------------------------------------------------- 1 | # Output 2 | ![texto cualquiera por si no carga la imagen](https://github.com/naivenom/reversing-list/blob/master/Hack%20The%20Box/Impossible%20Password/out.png) 3 | -------------------------------------------------------------------------------- /Hack The Box/Impossible Password/impossible_password.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hack The Box/Impossible Password/impossible_password.bin -------------------------------------------------------------------------------- /Hack The Box/Impossible Password/out.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hack The Box/Impossible Password/out.png -------------------------------------------------------------------------------- /Hacklu CTF 2018/Baby Reverse/estimate.py: -------------------------------------------------------------------------------- 1 | import random 2 | import sys 3 | import r2pipe 4 | import time 5 | 6 | '''profile: chall.rr2 7 | #!/usr/bin/rarun2 8 | program=./chall 9 | stdin="AAAA" 10 | stdout= 11 | ''' 12 | r = r2pipe.open("./chall") 13 | r.cmd('e dbg.profile=chall.rr2') 14 | r.cmd('doo') # initially you are debugging rarun2 15 | r.cmd('db 0x0040008e') 16 | r.cmd('dc') 17 | print r.cmd('drj') 18 | print (chr(27) + "[0;33m" + "[+]Key: "+chr(27) + "[0m") 19 | key = r.cmdj('pxj 46@%s'%0x0040010c) 20 | print(key) 21 | key_value = 10 22 | 23 | def check_key(key): 24 | char_sum = 0 25 | for c in key: 26 | char_sum += ord(c) 27 | sys.stdout.write("{0:3} | {1} \r".format(char_sum, key)) 28 | sys.stdout.flush() 29 | return char_sum 30 | 31 | timeout = time.time()+1 32 | print (chr(27) + "[1;36m" + "[+] STAGE 1 - RECON: Estimate first values" + chr(27) + "[0m") 33 | while True: 34 | test = 0 35 | if test == 1 or time.time() > timeout: 36 | break 37 | a = "" 38 | a += random.choice("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_!{}") 39 | b = "" 40 | b += random.choice("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_!{}") 41 | rand_a = check_key(a) 42 | rand_b = check_key(b) 43 | 44 | 45 | xored = rand_a ^ rand_b 46 | if key_value == xored: 47 | print (chr(27) + "[0;33m" + "\n\tEstimate values: %s, %s "%(chr(rand_a),chr(rand_b))+chr(27) + "[0m") 48 | test = test-1 49 | 50 | print (chr(27) + "[1;36m" + "[+] STAGE 2 - SOLVE" + chr(27) + "[0m") 51 | input_zero = raw_input("Input[0]>>>") 52 | input_one = raw_input("Input[1]>>>") 53 | input_n = ord(input_one) 54 | flag = [] 55 | for i in range(len(key)-1): 56 | input_n = key[i+1]^input_n 57 | flag.append(chr(input_n)) 58 | print("".join(input_zero)+"".join(input_one)+"".join(flag)) 59 | 60 | ''' 61 | 62 | 108 | l 63 | Estimate values: f, l 64 | 70 | F 65 | Estimate values: L, F 66 | 90 | Z 67 | Estimate values: P, Z 68 | 113 | q 69 | Estimate values: {, q 70 | [+] STAGE 2 - SOLVE 71 | Input[0]>>>f 72 | Input[1]>>>l 73 | flag{Yay_if_th1s_is_yer_f1rst_gnisrever_flag!} 74 | ''' 75 | -------------------------------------------------------------------------------- /Hacklu CTF 2018/Baby Reverse/public/chall: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Hacklu CTF 2018/Baby Reverse/public/chall -------------------------------------------------------------------------------- /Hacklu CTF 2018/Baby Reverse/public/notes: -------------------------------------------------------------------------------- 1 | Hey there, future Reverser! 2 | 3 | We created this small challenge to introduce you to reversing. This task might _still_ take quite some time, but trust us, it will be very rewarding! 4 | We sadly can't spoonfeed you, but we created a set of questions which you might want to answer yourself. We expect you to google on your own and find resources. 5 | 6 | Sooo, lets get started! 7 | 8 | - What kind of binary have you got infront of you? (Hint: "file" command) 9 | - How can you disassemble the file? (objdump, gdb, radare...) 10 | - Which programs are common debuggers? 11 | - How can I use them? (we recommend gdb with the peda plugin) 12 | - - how can I set breakpoints? 13 | - - in which different ways can I step through programs? 14 | - - how can I print/examine the content of memory/addresses 15 | - what is inside registers? what's rax, rip, rsp? 16 | - what is the linux syscall convention? 17 | - - In which register is the second argument? 18 | - - In which register is the syscall number? 19 | - - - where can I find the syscall numbers on my own linux system? 20 | - what happens at a call instruction? 21 | - how can I compare strings in assembly? 22 | - .. ask your teammates for more! annoy them if anything is unclear :P 23 | - .. if you don't got any teammates, use IRC and say that it's about the baby challenge 24 | 25 | There is a lot of work ahead of you, and maybe some sleepless nights with a lot of googling - but it will be worth it;-)! 26 | We are certain that with a dedicated mind you can solve this task and from there on you'll be ready for a bright future! 27 | Don't give up, we all have been there. Stick to it and you'll be rewarded =) 28 | -------------------------------------------------------------------------------- /HoneyCON CTF 2018/Basic Conditional Decision/rev3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/HoneyCON CTF 2018/Basic Conditional Decision/rev3 -------------------------------------------------------------------------------- /HoneyCON CTF 2018/Brute Me/rev4: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/HoneyCON CTF 2018/Brute Me/rev4 -------------------------------------------------------------------------------- /HoneyCON CTF 2018/Brute Me/solve.py: -------------------------------------------------------------------------------- 1 | import random 2 | import sys 3 | def check_key(key): 4 | char_sum = 0 5 | for c in key: 6 | char_sum += ord(c) 7 | sys.stdout.write("{0:3} | {1} \r".format(char_sum, key)) 8 | sys.stdout.flush() 9 | return char_sum 10 | 11 | key = "" 12 | 13 | while True: 14 | key += random.choice("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_") 15 | s = check_key(key) 16 | key_= [13,60,15,72,30,87,48] 17 | xor = [] 18 | leak = [68,99,87,120] 19 | suma1 = 0 20 | suma2 = 0 21 | for b in range(len(leak)): 22 | suma1+=leak[b] 23 | if s > 666: 24 | key = "" 25 | elif s==666: 26 | if len(key[0:3])== 3: 27 | for x in range(len(key[0:3])): 28 | try: 29 | leak.append(ord(key[x])) 30 | suma1+= ord(key[x]) 31 | except IndexError: 32 | pass 33 | for i in range(len(key_)): 34 | xor.append(leak[i] ^ key_[i]) 35 | suma2 += xor[i] 36 | charr = '' 37 | if suma2 == 569 and suma1 ==666: 38 | for v in range(len(xor)): 39 | charr+=chr(xor[v]) 40 | print "Localizado una clave valida: {0}".format(charr) 41 | 42 | else: 43 | pass 44 | -------------------------------------------------------------------------------- /HoneyCON CTF 2018/Ultra Secure Bank Login/reto5: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/HoneyCON CTF 2018/Ultra Secure Bank Login/reto5 -------------------------------------------------------------------------------- /INSTRUO CTF 2018/Tez Bano Tez/rev150: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/INSTRUO CTF 2018/Tez Bano Tez/rev150 -------------------------------------------------------------------------------- /INSTRUO CTF 2018/Tez Bano Tez/rev150.rr2: -------------------------------------------------------------------------------- 1 | #!/usr/bin/rarun2 2 | program=./rev_patch 3 | stdin= 4 | stdout= 5 | -------------------------------------------------------------------------------- /INSTRUO CTF 2018/Tez Bano Tez/rev_patch: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/INSTRUO CTF 2018/Tez Bano Tez/rev_patch -------------------------------------------------------------------------------- /INSTRUO CTF 2018/Tez Bano Tez/solve.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | 3 | #r = r2pipe.open( 4 | #filename='', flags=['-d', 'rarun2', 'program=psv', 'stdin="r2con{"']) 5 | r = r2pipe.open("./rev_patch") 6 | r.cmd('e dbg.profile=rev150.rr2') 7 | r.cmd('doo') # initially you are debugging rarun2 8 | r.cmd('db 0x0040069a') 9 | r.cmd('dc') 10 | print r.cmd('drj') 11 | def step(): 12 | r.cmd('ds') 13 | r.cmd('sr rip') 14 | while True: 15 | list_ = [] 16 | disass = [] 17 | while True: 18 | instruction = r.cmdj('pdj 1')[0] 19 | disass.append(instruction['opcode']) 20 | if instruction['opcode'] == 'mov edx, ecx': 21 | print("[+]RCX Value: "+r.cmd('dr rcx')) 22 | value = r.cmdj('drj')["rcx"] 23 | list_.append(chr(value)) 24 | print("".join(list_)) 25 | 26 | step() 27 | -------------------------------------------------------------------------------- /InCTF 2018/Decoy/Decoy.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/InCTF 2018/Decoy/Decoy.exe -------------------------------------------------------------------------------- /InCTF 2018/Decoy/README.md: -------------------------------------------------------------------------------- 1 | # Write-up - Decoy 2 | We open the binary with IDA and we realize that the binary gets an input from stdin. Also the input password needs a 44 lenght value so we start with something like that aaaaaaaaaaabbbbbbbbbbbcccccccccccddddddddddd. We set a breakpoint here 0x0040341F and patch this instruction with jnz.
3 | After the fgets function call we will analyze important functions. 4 | ## sub_4018D9 5 | We are in this part of lenght bbbbbbbbbbb because of this instruction movzx eax, byte ptr [eax] move 0x62 byte. 6 | Here cmp dl, al we realize that this compare with the first byte of hardcoded key (mv|GLp+Gv+ xored, with our input byte xored two times so we need resolve this: 7 | 
input[0] = ?
 8 | xor1 = 0xb
 9 | xor2 = 0x13
10 | al = 0x28
11 |
12 | The first input should be 0x30 or 0 if we want that this comparation is equal to al register. After all iteration we will have 0und_Th3_n3 so we have currently this --> aaaaaaaaaaa0und_Th3_n3cccccccccccddddddddddd 13 | 14 | ## sub_401AB9 15 | Next part we enter in this function and we realize that corresponds to the first part of the flag as it uses aaaaaaaaaaa. 16 | In this instruction cmp bl, al we see that this compare with the first byte of hardcoded key }[2waHmrgxj with our input 0x61 + two bytes, so this 0x63. Also with + four bytes after sixth iteration. We need resolve this: 17 | 
0x63-0x2 = 0x61 (our input)
18 | 0x7d-0x2 = 0x7b or { (correct input)
19 |
20 | We get {Y0u_Finctf and the correct will be inctf{Y0u_F. We have currently this --> inctf{Y0u_F0und_Th3_n3cccccccccccddddddddddd
21 | In sub_4018A0 function we enter into and we realize that there is an IsDebuggerPresent so we just need patch the instruction with jnz. 22 | 23 | ## sub_401E73 24 | Next function we see that correspond with this part of lenght password ddddddddddd. 25 | In this code we need that eax register will be 0 after strncmp function call. 26 | 
lea     eax, [ebp+var_2A]
27 | mov     [esp+48h+Str2], eax ; Str2
28 | lea     eax, [ebp+var_1F]
29 | mov     [esp+48h+Str1], eax ; Str1
30 | call    strncmp
31 | mov     [ebp+var_14], eax
32 |
33 | Str1 is hardcoded string {`I5z%u5dL~ and Str2 is our input 0x64 + one byte, so this 0x65. 34 | 
0x65-0x1 = 0x64 (our input)
35 | 0x7b-0x1 = 0x7a or z (correct input)
36 |
37 | The string will be z_H4y$t4cK}. We have currently this --> inctf{Y0u_F0und_Th3_n3cccccccccccz_H4y$t4cK} 38 | 39 | ## sub_4024C3 40 | In last function we see that our input starts from the end towards the beginning so we replace this part ccccccccccc with ABCDEFGHIJK. To resolve this problem we have a key 7D 15 41 1E 70 39 66 55 39 5D 6E and other xored value: 41 | 
First:
42 | 0x4a+0x1 = 0x4b (our input)
43 | 0x7d-0x1 = 0x7c or | (correct input)
44 | Second:
45 | xor = 0x4b^0x7d                               #0x4b = input and 0x7d second value of key.
46 | R= 0x15^0x7d = 0x68 or h (correct input)      #0x15 third value of key.
47 | Third:
48 | xor = 0x49^0x15                               #0x49 = input and 0x15 third value of key.
49 | R= 0x41^0x15 = 0x54 or T (correct input)      #0x41 third value of key.
50 | And so on...
51 |
52 | Finally we get this string value 3dl3_In_Th| so the flag is: inctf{Y0u_F0und_Th3_n33dl3_In_Th|z_H4y$t4cK}
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Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. 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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Malware Data Science/ch1/README.md: -------------------------------------------------------------------------------- 1 | Code and Data 2 | -------------------------------------------------------------------------------- /Malware Data Science/ch1/fakepdfmalware.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Malware Data Science/ch1/fakepdfmalware.exe -------------------------------------------------------------------------------- /Malware Data Science/ch1/fakeword.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Malware Data Science/ch1/fakeword.exe -------------------------------------------------------------------------------- /Malware Data Science/ch1/ircbot.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Malware Data Science/ch1/ircbot.exe -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/In time/in-time: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Navarra Lan Party CTF 2018/In time/in-time -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/In time/intime.rr2: -------------------------------------------------------------------------------- 1 | #!/usr/bin/rarun2 2 | program=./in-time 3 | stdin="flag{AAAAAAAAAAAAAAAA}" 4 | stdout= 5 | -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/In time/solve_intime.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | import sys 3 | 4 | def lenght(value): 5 | for i in value[:]: 6 | if i == 0: 7 | value.remove(i) 8 | return value 9 | 10 | #SYM.TR1 FUNCTION 11 | def symtr1(msg): 12 | list_ = [] #mov rax, qword obj.msg 13 | for i in range(len(msg)): #mov rdi, rax 14 | xor = msg[i] ^ 22 #call sym.imp.strlen 15 | list_.append(xor) #xor eax, ebx 16 | return list_ 17 | 18 | #SYM.TR2 + SWEETENED ESTIMATE TIME #lea rdx, obj.j 19 | def sweetened(xored,values,key): #movzx ecx, byte [rax + rdx] 20 | list_flag = [] #mov eax, dword obj.tiempo 21 | list_estimate = [] #add eax, eax 22 | for i in range(len(values)): #lea rdx, obj.t 23 | for b in range(44): #movzx eax, byte [rax + rdx] 24 | c = values[i] ^ key[b] #xor ecx, eax 25 | if xored[i] == c: 26 | list_flag.append(c) 27 | list_estimate.append(key[b]) 28 | break 29 | return list_flag[:-2],list_estimate[:-2] 30 | 31 | 32 | if __name__ == "__main__": 33 | 34 | r = r2pipe.open("./in-time") 35 | r.cmd('e dbg.profile=intime.rr2') 36 | r.cmd('doo') #initially you are debuggign rarun2 37 | r.cmd('db main') #Random memory address code so setting bp in main 38 | r.cmd('dc') 39 | rip = r.cmdj('drj')['rip'] 40 | bp = rip+139 #distance from main to offset we want to continue 41 | r.cmd('db %s'%hex(bp)) 42 | r.cmd('dc') 43 | 44 | print (chr(27) + "[1;36m" + "[+] STAGE 1 - RECON: Getting final value, key and initial xored with input" + chr(27) + "[0m") 45 | final_values = rip+11654 #distance from main to obj.s offset. We know that this obj is the final values to cmp with sym.imp.strcmp my obj.j xored 46 | 47 | print("[+] Final values:") 48 | print(r.cmd('px 24@%s'%hex(final_values))) 49 | values = r.cmdj('pxj 24@%s'%hex(final_values)) 50 | values_ = lenght(values) 51 | lenght_values = len(values_) 52 | 53 | print (chr(27) + "[0;33m" + "\tLenght of final values is exactly: "+str(lenght_values)+chr(27) + "[0m") 54 | 55 | raw_key = rip+11718 #distance from main to obj.t offset. This key is xored with xored lenght input value. 56 | print("[+] Key:") 57 | print(r.cmd('px 50@%s'%hex(raw_key))) 58 | key = r.cmdj('pxj 50@%s'%hex(raw_key)) 59 | key_ = lenght(key) 60 | lenght_key = len(key_) 61 | 62 | print (chr(27) + "[0;33m" + "\tLenght of key is exactly: "+str(lenght_key)+chr(27) + "[0m") 63 | 64 | input_password = rip+11942 #distance from main to obj.msg offset. This key is our input password via stdin. 65 | print("[+] Our stdin:") 66 | print(r.cmd('px 50@%s'%hex(input_password))) 67 | passwd = r.cmdj('pxj 50@%s'%hex(input_password)) 68 | passwd_ = lenght(passwd) 69 | lenght_passwd = len(passwd_) 70 | 71 | print (chr(27) + "[0;33m" + "\tLenght of our input: "+str(lenght_passwd)+chr(27) + "[0m") 72 | if lenght_passwd != lenght_values: 73 | print("[!] Error: Our input value has to be 22 of lenght and you put: %s"%str(lenght_passwd)) 74 | sys.exit(1) 75 | r.quit() 76 | print("[+] Final values: %s"%values_) 77 | print (chr(27) + "[1;36m" + "[+] STAGE 2 - ESTIMATED TIME: We estimate the time because of the frecuency key index used, using as example flag{ format" + chr(27) + "[0m") 78 | xored_input = symtr1(passwd_) 79 | print("[+] Xored input with input lenght: %s"%xored_input) 80 | estimated = sweetened(xored_input,values_,key_) 81 | print("[+] Valid Xored values: %s"%estimated[0]) 82 | tohex = [] 83 | est_ = estimated[1] 84 | for i in range(len(est_)): 85 | hex_ = hex(est_[i]) 86 | tohex.append(hex_) 87 | print("[+] Valid key values: %s"%estimated[1]+"~"+"".join(str(tohex))) 88 | hex_key = [] 89 | print("[+] Hex list key values reference:") 90 | for i in range(len(key_)): 91 | hex_key.append(hex(key_[i])) 92 | print(hex_key) 93 | print (chr(27) + "[0;33m" + "\tTo SOLVE XOR Operation: Final values ^ Valid key values = xored_input^0x16"+chr(27) + "[0m") 94 | -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/Key is the key/keyisthekey.bin: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Navarra Lan Party CTF 2018/Key is the key/keyisthekey.bin -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/Key is the key/keyisthekey_patch: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Navarra Lan Party CTF 2018/Key is the key/keyisthekey_patch -------------------------------------------------------------------------------- /Navarra Lan Party CTF 2018/Key is the key/reverse.py: -------------------------------------------------------------------------------- 1 | import sys 2 | import time 3 | def time_sweetened(): 4 | b = time.strftime("%M",time.gmtime()) 5 | sweetened = int(b)+65 6 | return sweetened 7 | 8 | #SYM.Y FUNCTION 9 | def symy(key): 10 | key_list = [] 11 | try: 12 | key0 = 0xc9 ^ 0x91 13 | key0 = chr(key0) 14 | if key[0] == key0 and int(key[1]) in range(0,10): 15 | key_list.append(key0) 16 | key2 = 0x70 ^ 0x32 17 | key2 = chr(key2) 18 | if key[2] == key2 and int(key[3]) in range(0,10): 19 | key_list.append(key2) 20 | key5 = 0x94 ^ 0xce 21 | key5 = chr(key5) 22 | if key[5] == key5 and int(key[6]) in range(0,10): 23 | key_list.append(key5) 24 | key7 = 0x41 ^ 0x0b 25 | key7 = chr(key7) 26 | if key[7] == key7 and int(key[8]) in range(0,10): 27 | key_list.append(key7) 28 | key10 = 0x4c ^ 0x15 29 | key10 = chr(key10) 30 | if key[10] == key10 and int(key[11]) in range(0,10): 31 | key_list.append(key10) 32 | key12 = 0xa9 ^ 0xe2 33 | key12 = chr(key12) 34 | if key[12] == key12 and int(key[13]) in range(0,10): 35 | key_list.append(key12) 36 | key15 = 0x2d ^ 0x6e 37 | key15 = chr(key15) 38 | if key[15] == key15 and int(key[16]) in range(0,10): 39 | key_list.append(key15) 40 | key17 = 0x37 ^ 0x7b 41 | key17 = chr(key17) 42 | if key[17] == key17 and int(key[18]) in range(0,10): 43 | key_list.append(key17) 44 | else: 45 | print("[!] Error: Wrong KEY!") 46 | sys.exit(1) 47 | except ValueError: 48 | print("[!] Error: Wrong VALUE TYPE IN KEY!") 49 | sys.exit(1) 50 | return key_list 51 | 52 | #SYM.X FUNCTION 53 | def symx(y_value): 54 | list_ = [] 55 | xor_list = [] 56 | good = [] 57 | for x in range(0,10): 58 | list_.append("0x3"+str(x)) 59 | for i in range(0,10): 60 | if int(key[1]) or int(key[3]) or int(key[6]) or int(key[8]) or int(key[11]) or int(key[13]) or int(key[16]) or int(key[18]) == int(list_[i][3]): 61 | hex_key = list_[i] #movzx eax, byte [rax] 62 | #movsx eax, al 63 | sub = int(hex_key,16)-48 #sub eax, 0x30 64 | value = 6 #mov eax, dword [local_3ch] 65 | xor = sub ^ value #xor eax, dword [local_38h] 66 | xor_list.append(xor) #mov dword [local_34h], eax 67 | print (chr(27) + "[0;33m" + "\tXOR Values of 0x30 to 0x39: "+"".join(str(xor_list))+chr(27) + "[0m") 68 | for i in range(len(y_value)): 69 | rax = symc(y_value[i]) 70 | if y_value[i] == y_value[0]: 71 | if rax == xor_list[int(key[1])]: #cmp eax, dword [local_34h] 72 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 73 | good.append(int(key[1])) 74 | else: 75 | print("[!] Error: Wrong VALUE IN KEY!") 76 | sys.exit(1) 77 | elif y_value[i] == y_value[1]: 78 | if rax == xor_list[int(key[3])]: #cmp eax, dword [local_34h] 79 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 80 | good.append(int(key[3])) 81 | else: 82 | print("[!] Error: Wrong VALUE IN KEY!") 83 | sys.exit(1) 84 | elif y_value[i] == y_value[2]: 85 | if rax == xor_list[int(key[6])]: #cmp eax, dword [local_34h] 86 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 87 | good.append(int(key[6])) 88 | else: 89 | print("[!] Error: Wrong VALUE IN KEY!") 90 | sys.exit(1) 91 | elif y_value[i] == y_value[3]: 92 | if rax == xor_list[int(key[8])]: #cmp eax, dword [local_34h] 93 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 94 | good.append(int(key[8])) 95 | else: 96 | print("[!] Error: Wrong VALUE IN KEY!") 97 | sys.exit(1) 98 | elif y_value[i] == y_value[4]: 99 | if rax == xor_list[int(key[11])]: #cmp eax, dword [local_34h] 100 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 101 | good.append(int(key[11])) 102 | else: 103 | print("[!] Error: Wrong VALUE IN KEY!") 104 | sys.exit(1) 105 | elif y_value[i] == y_value[5]: 106 | if rax == xor_list[int(key[13])]: #cmp eax, dword [local_34h] 107 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 108 | good.append(int(key[13])) 109 | else: 110 | print("[!] Error: Wrong VALUE IN KEY!") 111 | sys.exit(1) 112 | elif y_value[i] == y_value[6]: 113 | if rax == xor_list[int(key[16])]: #cmp eax, dword [local_34h] 114 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 115 | good.append(int(key[16])) 116 | else: 117 | print("[!] Error: Wrong VALUE IN KEY!") 118 | sys.exit(1) 119 | elif y_value[i] == y_value[7]: 120 | if rax == xor_list[int(key[18])]: #cmp eax, dword [local_34h] 121 | print (chr(27) + "[0;33m" + "\tGood EAX = RBP-0x34: "+str(rax)+chr(27) + "[0m") 122 | good.append(int(key[18])) 123 | else: 124 | print("[!] Error: Wrong VALUE IN KEY!") 125 | sys.exit(1) 126 | return good 127 | #SYM.C FUNCTION 128 | def symc(y_value): 129 | rax = 0 130 | char_ = ord(y_value) #mov eax, dword [local_14h] 131 | while True: 132 | local4 = char_ & 1 #and eax, 1 133 | #mov dword [local_4h], eax 134 | char_ = char_>>1 #sar eax, 1 135 | if char_ == 1: 136 | rax = rax+1 #add eax, 1 137 | return rax 138 | if local4 == 1: #cmp dword [local_4h], 1 139 | rax = rax+1 #add dword [local_8h], 1 140 | 141 | if __name__ == "__main__": 142 | print(''' 143 | /$$ /$$ /$$$$$$ /$$ /$$ 144 | | $$ /$$/ /$$__ $$ | $$ | $$ 145 | | $$ /$$/ /$$$$$$ /$$ /$$ | $$ \ $$ /$$ /$$ /$$$$$$ | $$$$$$$ 146 | | $$$$$/ /$$__ $$| $$ | $$ /$$$$$$| $$$$$$$$| $$ | $$|_ $$_/ | $$__ $$ 147 | | $$ $$ | $$$$$$$$| $$ | $$|______/| $$__ $$| $$ | $$ | $$ | $$ \ $$ 148 | | $$\ $$ | $$_____/| $$ | $$ | $$ | $$| $$ | $$ | $$ /$$| $$ | $$ 149 | | $$ \ $$| $$$$$$$| $$$$$$$ | $$ | $$| $$$$$$/ | $$$$/| $$ | $$ 150 | |__/ \__/ \_______/ \____ $$ |__/ |__/ \______/ \___/ |__/ |__/ 151 | /$$ | $$ 152 | | $$$$$$/ Ultimate ultra-mega hacker key checker 153 | \______/ Version: 01.1337 (Only 1 key has been saved)''') 154 | try: 155 | if sys.argv[1] and sys.argv[2]: 156 | time_value = time_sweetened() 157 | print (chr(27) + "[0;33m" + "\tTime is time, do you know what I mean...: "+"".join(chr(time_value))+chr(27) + "[0m") 158 | try: 159 | if ord(sys.argv[1][1:]) == time_value and sys.argv[1][:1] == "-": 160 | if len(sys.argv[2]) == 19: 161 | key = sys.argv[2] 162 | if key[4] and key[9] and key[14] == "-": 163 | y_value = symy(key) 164 | if y_value == None: 165 | print("[!] Error: Wrong KEY!") 166 | sys.exit(1) 167 | else: 168 | print (chr(27) + "[1;36m" + "[+] STAGE 1: Checking A-Z char in Key succesfully!: %s"%(y_value) + chr(27) + "[0m") 169 | x_value = symx(y_value) 170 | print (chr(27) + "[1;36m" + "[+] STAGE 2: Checking 0-9 numbers in Key succesfully!: %s"%(x_value) + chr(27) + "[0m") 171 | final_key = [] 172 | for a in range(len(y_value)): 173 | final_key.append(y_value[a]) 174 | final_key.append(str(x_value[a])) 175 | if a == 1 or a == 3 or a == 5: 176 | final_key.append("-") 177 | print (chr(27) + "[0;33m" + "\tFlag: "+"".join(final_key)+chr(27) + "[0m") 178 | else: 179 | print("[!] Error: Wrong FORMAT KEY!") 180 | else: 181 | print("[!] Error: Wrong LENGHT!") 182 | else: 183 | print("[!] Error: Wrong TIME!") 184 | except TypeError: 185 | print("[!] Error: Wrong ARG FORMAT!") 186 | except IndexError: 187 | print("Usage: python reverse.py arg1 arg2") 188 | 189 | 190 | -------------------------------------------------------------------------------- /PatataCTF/Angry Potato/angry-potato: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/PatataCTF/Angry Potato/angry-potato -------------------------------------------------------------------------------- /PatataCTF/Angry Potato/reverse.py: -------------------------------------------------------------------------------- 1 | import sys 2 | 3 | #REVERSE ENGINEERING 4 | def control(suma): 5 | if len(hex(suma)) == 11: 6 | splitt = hex(suma).split()[0][3:] 7 | suma = int(splitt,16) 8 | return suma 9 | 10 | #SYM.HASH FUNCTION 11 | def symhash(password): 12 | for i in range(len(password)): 13 | if i == 0: 14 | fabada = 16431834 #mov eax, ebp-0x4 (0xfabada) 15 | shl = fabada<<6 #shl eax,6 16 | #print hex(shl) 17 | elif i == 1 or i == 2 or i == 3 or i == 4 or i == 5 or i == 6: 18 | #print hex(local4) 19 | fabada = local4 #mov eax, ebp-0x4 20 | shlOP = fabada<<6 #shl eax,6 21 | splitt = hex(shlOP).split()[0][4:] 22 | shl = int(splitt,16) 23 | #print hex(shl) 24 | 25 | #mov edx, eax 26 | #mov eax, ebp-0x4 27 | 28 | 29 | 30 | if len(hex(shl+fabada)) > 10: 31 | sum1 = control(shl+fabada) 32 | chrr = password[i] #mov eax, ebp-0x8 33 | #print chrr 34 | if len(hex(sum1+chrr)) > 10: 35 | sum2 = control(sum1+chrr) #add eax,edx 36 | sum3 = sum2+sum2 #add eax,eax 37 | local4 = sum3 #mov ebp-0x4,eax 38 | #print hex(local4) 39 | else: 40 | sum2 = sum1+chrr 41 | sum3 = sum2+sum2 42 | local4 = sum3 43 | #print hex(local4) 44 | else: 45 | sum1 = shl+fabada 46 | ##print(hex(sum1)) 47 | chrr = password[i] 48 | #print chrr 49 | if len(hex(sum1+chrr)) > 10: 50 | sum2 = control(sum1+chrr) 51 | sum3 = sum2+sum2 52 | local4 = sum3 53 | #print hex(local4) 54 | else: 55 | sum2 = sum1+chrr 56 | #print hex(sum2) 57 | if len(hex(sum2+sum2)) > 10: 58 | sum3 = control(sum2+sum2) 59 | local4 = sum3 60 | #print hex(local4) 61 | else: 62 | sum3 = sum2+sum2 63 | local4 = sum3 64 | #print hex(local4) 65 | 66 | return hex(local4) 67 | 68 | #SYM.HASH2 FUNCTION 69 | def symhash2(password): 70 | for i in range(len(password)): 71 | if i == 0: 72 | beef = 48879 #mov eax, ebp-0x4 (0xbeef) 73 | shl = beef<<5 #shl eax,6 74 | #print hex(shl) 75 | elif i == 1 or i == 2 or i == 3 or i == 4 or i == 5 or i == 6: 76 | #print hex(local4) 77 | beef = local4 #mov eax, ebp-0x4 78 | shlOP = beef<<5 #shl eax,5 79 | if len(hex(shlOP)) > 11: 80 | splitt = hex(shlOP).split()[0][4:] 81 | shl = int(splitt,16) 82 | #print hex(shl) 83 | elif len(hex(shlOP)) > 10: 84 | splitt = hex(shlOP).split()[0][3:] 85 | shl = int(splitt,16) 86 | #print hex(shl) 87 | else: 88 | shl = shlOP 89 | #print hex(shl) 90 | #mov edx,eax 91 | #mov eax,ebp-0x4 92 | 93 | 94 | if len(hex(shl+beef)) > 10: 95 | sum1 = control(shl+beef) #add edx, eax 96 | chrr = password[i] #mov eax, ebp-0x8 97 | #print chrr 98 | if len(hex(sum1+chrr)) > 10: 99 | sum2 = control(sum1+chrr) #add eax,edx 100 | local4 = sum2 #mov ebp-0x4,eax 101 | #print hex(local4) 102 | else: 103 | sum2 = sum1+chrr 104 | local4 = sum2 105 | #print hex(local4) 106 | else: 107 | sum1 = shl+beef 108 | ##print(hex(sum1)) 109 | chrr = password[i] 110 | #print chrr 111 | if len(hex(sum1+chrr)) > 10: 112 | sum2 = control(sum1+chrr) 113 | local4 = sum2 114 | #print hex(local4) 115 | else: 116 | sum2 = sum1+chrr 117 | #print hex(sum2) 118 | local4 = sum2 119 | #print hex(local4) 120 | 121 | return hex(local4) 122 | 123 | if __name__ == "__main__": 124 | try: 125 | if sys.argv[1]: 126 | password = [] 127 | for i in range(len(sys.argv[1])): 128 | password.append(ord(sys.argv[1][i])) 129 | if len(password) == 7: 130 | print (chr(27) + "[1;36m" + "[+] REVERSE ENGINEERING" + chr(27) + "[0m") 131 | local20 = 2941729636 #mov qword [local_20h], -0x50a8c49c == 0xffffffffaf573b64 == low part 0xaf573b64 132 | local28 = 1512702707 #mov QWORD PTR [rbp-0x28], 0x5a2a02f3 133 | hash1 = symhash(password) #ret 134 | print("First Hash: "+hash1) 135 | local30 = int(hash1, 16) #mov ebp-0x30, rax 136 | hash2 = symhash2(password) #ret 137 | print("Second Hash: "+hash2) 138 | local38 = int(hash2, 16) #mov ebp-0x38, rax 139 | rax = local30 #mov rax, ebp-0x30 140 | 141 | #Now the first check compare the first hash with local variable local20 whose content in stack is 0xaf573b64 142 | 143 | if rax == local20: #cmp rax,QWORD PTR [rbp-0x20] 144 | rax = local38 #mov rax,QWORD PTR [rbp-0x38] 145 | if rax == local28: #cmp rax,QWORD PTR [rbp-0x28] Second check with hash2 and local28 hardcoded 146 | print("\nGood!") #mov DWORD PTR [rbp-0x4],0x10 147 | 148 | else: 149 | print("\nBad") #mov DWORD PTR [rbp-0x4],0xc 150 | else: 151 | print("\nBad") #mov DWORD PTR [rbp-0x4],0xc 152 | else: 153 | print("[!] Error: Wrong LENGHT!") 154 | except IndexError: 155 | print("Usage: python reverse.py password") 156 | 157 | -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-01/Lab01-01.dll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Practical Malware Analysis Lab/Lab01-01/Lab01-01.dll -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-01/Lab01-01.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Practical Malware Analysis Lab/Lab01-01/Lab01-01.exe -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-01/README.md: -------------------------------------------------------------------------------- 1 | # Lab 01-01 2 | Scripting with r2pipe and getting information from malware binary. 3 | -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-01/recon-lab1-1.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | import base64 3 | import socket 4 | def valid_ip(address): 5 | try: 6 | socket.inet_aton(address) 7 | return True 8 | except: 9 | return False 10 | 11 | r = r2pipe.open("Lab01-01.dll") 12 | r.cmd('aaa') 13 | print (chr(27) + "[1;36m" + "\t\t\t\t\tSTAGE 1 - RECON: Getting information from Strings in PE File" + chr(27) + "[0m") 14 | out = r.cmdj('izj') 15 | print("[+] Strings from binary:") 16 | for i in range(len(out)): 17 | encoded_ = out[i]["string"] #All base64 strings 18 | strings = base64.b64decode(encoded_) 19 | print(strings) 20 | if strings == "KERNEL32.dll": 21 | print (chr(27) + "[0;33m" + "[+] Suggestion: If we look imports from %s probably we see functions for opening and manipulating files"%strings + chr(27) + "[0m") 22 | elif strings == "FindNextFileA" or strings == "FindFirstFileA": 23 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s function tell us that probably the malware searches through the filesystem, and that i can open and modify files"%strings + chr(27) + "[0m") 24 | elif strings == ".exe": 25 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string maybe it will search for executables on the victim's system"%strings + chr(27) + "[0m") 26 | elif strings == "CreateProcessA" or strings == "Sleep": 27 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s function imported from Kernel32.dll which are commonly used by backdoors"%strings + chr(27) + "[0m") 28 | elif strings == "WS2_32.dll": 29 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s probably connects to a network or performs network-related tasks"%strings + chr(27) + "[0m") 30 | elif strings == "exec": 31 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string is probably sent over the network to command the backdoor to run a program with CreateProcess"%strings + chr(27) + "[0m") 32 | elif strings == "sleep": 33 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string is probably used to command the backdoor program to sleep"%strings + chr(27) + "[0m") 34 | elif valid_ip(strings) == True: 35 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s this IP Address should be routable and it would be a good network-based indicator for use in identifying probably malware"%strings + chr(27) + "[0m") 36 | -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-02/Lab01-02.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Practical Malware Analysis Lab/Lab01-02/Lab01-02.exe -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-02/README.md: -------------------------------------------------------------------------------- 1 | Scripting with r2pipe and getting information from malware binary. 2 | -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-02/Unpacked_Lab01-02.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/Practical Malware Analysis Lab/Lab01-02/Unpacked_Lab01-02.exe -------------------------------------------------------------------------------- /Practical Malware Analysis Lab/Lab01-02/recon-lab1-2.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | import base64 3 | import socket 4 | import re 5 | 6 | def valid_url(string): 7 | url = re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\), ]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', string) 8 | return url 9 | 10 | def valid_ip(address): 11 | try: 12 | socket.inet_aton(address) 13 | return True 14 | except: 15 | return False 16 | 17 | r = r2pipe.open("Unpacked_Lab01-02.exe") 18 | r.cmd('aaa') 19 | print (chr(27) + "[1;36m" + "\t\t\t\t\tSTAGE 1 - RECON: Getting information about Sections" + chr(27) + "[0m") 20 | out = r.cmdj('iSj') 21 | for i in range(len(out)): 22 | print(out[i]["name"]) 23 | print("[+] Virtual Size: %i"%out[i]["vsize"]) 24 | print("[+] Raw Data Size: %i"%out[i]["size"]) 25 | print("[+] Permission: %s"%out[i]["perm"]) 26 | 27 | print (chr(27) + "[1;36m" + "\t\t\t\t\tSTAGE 1 - RECON: Getting information from Strings in PE File" + chr(27) + "[0m") 28 | out = r.cmdj('izj') 29 | print("[+] Strings from binary:") 30 | for i in range(len(out)): 31 | encoded_ = out[i]["string"] #All base64 strings 32 | strings = base64.b64decode(encoded_) 33 | print(strings) 34 | if strings == "KERNEL32.dll" or strings == "KERNEL32.DLL": 35 | print (chr(27) + "[0;33m" + "[+] Suggestion: If we look imports from %s probably we see functions for opening and manipulating files"%strings + chr(27) + "[0m") 36 | elif strings == "FindNextFileA" or strings == "FindFirstFileA": 37 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s function tell us that probably the malware searches through the filesystem, and that i can open and modify files"%strings + chr(27) + "[0m") 38 | elif strings == ".exe": 39 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string maybe it will search for executables on the victim's system"%strings + chr(27) + "[0m") 40 | elif strings == "CreateProcessA" or strings == "Sleep": 41 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s function imported from Kernel32.dll which are commonly used by backdoors"%strings + chr(27) + "[0m") 42 | elif strings == "WS2_32.dll": 43 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s probably connects to a network or performs network-related tasks"%strings + chr(27) + "[0m") 44 | elif strings == "exec": 45 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string is probably sent over the network to command the backdoor to run a program with CreateProcess"%strings + chr(27) + "[0m") 46 | elif strings == "sleep": 47 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s string is probably used to command the backdoor program to sleep"%strings + chr(27) + "[0m") 48 | elif valid_ip(strings) == True: 49 | print (chr(27) + "[0;33m" + "[+] Suggestion: %s this IP Address should be routable and it would be a good network-based indicator for use in identifying probably malware"%strings + chr(27) + "[0m") 50 | elif strings == "WININET.dll": 51 | print (chr(27) + "[0;33m" + "[+] Suggestion: Imports from %s tell us that this code connects to the Internet"%strings + chr(27) + "[0m") 52 | elif strings == "ADVAPI32.dll": 53 | print (chr(27) + "[0;33m" + "[+] Suggestion: Imports from %s tell us that the code creates a service"%strings + chr(27) + "[0m") 54 | try: 55 | if valid_url(strings)[0] == strings: 56 | print (chr(27) + "[0;33m" + "[+] Suggestion: URL %s probably opened by InternetOpenURL function"%strings + chr(27) + "[0m") 57 | except IndexError: 58 | pass 59 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | It is a list of reversing challenges compiled from different CTF, whose content is the binary and solution using r2pipe, IDAPython or just reverse binary in high-level language like Python or C, and some writeups!. It is a list in continuous update so enjoy and learn!. 2 | # Baby 3 | | Challenge | Output and info| 4 | | ----- | ------ | 5 | | 9447 CTF 2015: The real flag finder | Usage: ./flagFinderRedux [arg1]
![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 6 | | Defcamp CTF Qualifications 2015: entry-language-100 | Enter the password: [stdin]
![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 7 | | Hack The Box: Find The Easy Pass | Enter Password: [stdin]
![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 8 | | Hack The Box: Impossible Password | * [stdin]
![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 9 | | CCN-Cert Atenea CTF: WannaCry | ![#FF0000](https://placehold.it/15/ff0000/000000?text=+) Malware ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 10 | | CCN-Cert Atenea CTF: Saint Seiya | Enter Key: [stdin]
![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe | 11 | | CCN-Cert Atenea CTF: Spear Phising... Can you catch me? | ![#FF0000](https://placehold.it/15/ff0000/000000?text=+) Malware ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 12 | | CCN-Cert Atenea CTF: Counter | ![#D2691E](https://placehold.it/15/d2691e/000000?text=+) Packed ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 13 | | CCN-Cert Atenea CTF: Crackme! if you can... | Usage: crypt0.exe [arg1] [arg2]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 14 | | H4CK1T CTF 2016: Crypt00perator | Enter th3 k3y: [stdin]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 15 | | CSAW 2016: Gametime | ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 16 | | Hack.lu CTF 2018: Baby Reverse | Welcome to this Chall! Enter the Key to win: [stdin]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 17 | | INSTRUO CTF 2018: Tez Bano Tez | INSTRUO-2018 IIEST-S *** Calculating key...
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 18 | | HoneyCON CTF 2018: Basic Conditional Decision | Usage: rev3 [arg1],
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 19 | | X-MAS CTF 2019: Santa's crackme | [stdin], Binary: main
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 20 | | X-MAS CTF 2019: Santa's crackme | [stdin], Binary: main
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 21 | | Basic Algorithm Decrypt function | Usage: entropy [arg1], Binary: entropy
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 22 | | Iris CTF 2024, Baby rev Johnson | Usage: main [stdin], Binary: main
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 23 | | Iris CTF 2024, Whats a rune | Usage: main.go , Source Code: main.go
![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Golang| 24 | 25 | # Easy 26 | | Challenge | Output and info| 27 | | ----- | ------ | 28 | | r2con2018: psv | Welcome to PSV (Perfectly Secure Vault)! Enter your secret key to unlock: [stdin]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 29 | | r2con2018: scrabble | Usage: scrabble [arg1],
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 30 | | r2con2018: forceme | ****** As a Lockpicking master, Open the Lock! ******* Usage: forceme [arg]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 31 | | Navarra Lan Party CTF 2018: Key is the key | Ultimate ultra-mega hacker key checker Version: 01.1337 (Only 1 key has been saved) Usage: keyisthekey [arg1] [arg2] by KaoRz (@alextaito99)
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#D2691E](https://placehold.it/15/d2691e/000000?text=+) Packed ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf ![#9900ff](https://placehold.it/15/9900ff/000000?text=+) Anti-Debugging| 32 | | Flare-On 2018: Ultimate Minesweeper | .NET Game by Nick Harbour (@nickharbour)
![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 33 | | HoneyCON CTF 2018: Brute Me | Usage: rev4 [arg1],
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 34 | | HoneyCON CTF 2018: Ultra Secure Bank Login | Es necesario introducir los 8 PINes para realizar login en FWHIBBIT Bank PIN 1: [stdin],
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 35 | 36 | # Medium 37 | 38 | | Challenge | Output and info| 39 | | ----- | ------ | 40 | | r2con2018: disqualified | Show me what you got: [stdin] by Megabeets (@megabeets_)
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 41 | | Navarra Lan Party CTF 2018: In time | Introduce tu flag y comprueba si es la correcta [stdin] Espere unos instantes... by Gibdeon (@gibdeon)
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 42 | | PatataCTF 2018: Angry Potato | ./angry-patatas [arg] by Patatas (@HackingPatatas)
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf| 43 | | InCTF 2018: Decoy | Input: [stdin]
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe ![#9900ff](https://placehold.it/15/9900ff/000000?text=+) Anti-Debugging| 44 | | X-MAS CTF 2019: Last Christmas | Binary: LAST_XMAS
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf ![#D2691E](https://placehold.it/15/d2691e/000000?text=+) Packed ![#9900ff](https://placehold.it/15/9900ff/000000?text=+) Anti-Debugging| 45 | | CTF FWHIBBIT 2020: EB SECRET | Web Access DON'T RUN AS ROOT
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#ffff1a](https://placehold.it/15/ffff1a/000000?text=+) Elf ![#8000ff](https://placehold.it/15/8000ff/000000?text=+) Obfuscate ![#9900ff](https://placehold.it/15/9900ff/000000?text=+) Anti-Debugging| 46 | | State Machine 2018: Ret0 |CLS Team 2018 Enter Password: [stdin] by @Bym24v
![#c5f015](https://placehold.it/15/c5f015/000000?text=+) Crackme ![#1aa3ff](https://placehold.it/15/1aa3ff/000000?text=+) Exe| 47 | 48 | # Hard 49 | | Challenge | Output and info| 50 | | ----- | ------ | 51 | 52 | 53 | # Insane 54 | | Challenge | Output and info| 55 | | ----- | ------ | 56 | -------------------------------------------------------------------------------- /State machine/Ret0/Ret0.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/State machine/Ret0/Ret0.zip -------------------------------------------------------------------------------- /State machine/Ret0/keygen.py: -------------------------------------------------------------------------------- 1 | import random 2 | import sys 3 | import time 4 | def check_key(key): 5 | char_sum = 0 6 | for c in key: 7 | char_sum += ord(c) 8 | sys.stdout.write("{0:3} | {1} \r".format(char_sum, key)) 9 | sys.stdout.flush() 10 | return char_sum 11 | 12 | print (chr(27) + "[1;32m" + "S T A T E M A C H I N E Keygen Ret0 by @naivenom"+chr(27) + "[0m") 13 | time.sleep(2) 14 | timeout = time.time()+1 15 | first = [];second = [];third = [];four = [];five = [];six = [];seven = [];eight = [];nine = [];ten = []; 16 | eleven = [];twelve = [] ;thirteen=[]; fourteen = []; fifteen = []; sixteen = []; seventeen = []; eighteen = []; 17 | nineteen = []; twenty = []; twenty_one = []; 18 | while True: 19 | test = 0 20 | if test == 1 or time.time() > timeout: 21 | break 22 | key = "" 23 | key += random.choice("a#bcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_!$%&'()*+,./:;<>=?@[]`{~}\"") 24 | v2 = check_key(key) 25 | #print(v2) 26 | v3 = v2>>1 27 | #print("Division %d"%v3) 28 | if v3 <= 33: 29 | mult = v3*2 30 | v0 = 27 31 | esi = mult*v0 >> v0/5 32 | if esi == 28: 33 | print (chr(27) + "[0;33m" + "\n\tCase 28: %s "%(chr(v2))+chr(27) + "[0m") 34 | first.append(chr(v2)) 35 | twenty_one.append(chr(v2)) 36 | elif esi == 55: 37 | print (chr(27) + "[0;33m" + "\n\tCase 55: %s "%(chr(v2))+chr(27) + "[0m") 38 | fourteen.append(chr(v2)) 39 | 40 | if v3 >= 125: 41 | pass 42 | 43 | else: 44 | v0 = 27 45 | esi = v3*v0 >> v0/5 46 | if esi == 39: 47 | print (chr(27) + "[0;33m" + "\n\tCase 39: %s "%(chr(v2))+chr(27) + "[0m") 48 | second.append(chr(v2)) 49 | seven.append(chr(v2)) 50 | thirteen.append(chr(v2)) 51 | twenty.append(chr(v2)) 52 | elif esi == 40: 53 | print (chr(27) + "[0;33m" + "\n\tCase 40: %s "%(chr(v2))+chr(27) + "[0m") 54 | six.append(chr(v2)) 55 | elif esi == 41: 56 | print (chr(27) + "[0;33m" + "\n\tCase 41: %s "%(chr(v2))+chr(27) + "[0m") 57 | eleven.append(chr(v2)) 58 | elif esi == 34: 59 | print (chr(27) + "[0;33m" + "\n\tCase 34: %s "%(chr(v2))+chr(27) + "[0m") 60 | third.append(chr(v2)) 61 | eight.append(chr(v2)) 62 | elif esi == 42: 63 | print (chr(27) + "[0;33m" + "\n\tCase 42: %s "%(chr(v2))+chr(27) + "[0m") 64 | four.append(chr(v2)) 65 | seventeen.append(chr(v2)) 66 | elif esi == 43: 67 | print (chr(27) + "[0;33m" + "\n\tCase 43: %s "%(chr(v2))+chr(27) + "[0m") 68 | ten.append(chr(v2)) 69 | eighteen.append(chr(v2)) 70 | elif esi == 44: 71 | print (chr(27) + "[0;33m" + "\n\tCase 44: %s "%(chr(v2))+chr(27) + "[0m") 72 | twelve.append(chr(v2)) 73 | elif esi == 45: 74 | print (chr(27) + "[0;33m" + "\n\tCase 45: %s "%(chr(v2))+chr(27) + "[0m") 75 | sixteen.append(chr(v2)) 76 | elif esi == 48: 77 | print (chr(27) + "[0;33m" + "\n\tCase 48: %s "%(chr(v2))+chr(27) + "[0m") 78 | five.append(chr(v2)) 79 | nine.append(chr(v2)) 80 | elif esi == 49: 81 | print (chr(27) + "[0;33m" + "\n\tCase 49: %s "%(chr(v2))+chr(27) + "[0m") 82 | nineteen.append(chr(v2)) 83 | elif esi == 50: 84 | print (chr(27) + "[0;33m" + "\n\tCase 50: %s "%(chr(v2))+chr(27) + "[0m") 85 | fifteen.append(chr(v2)) 86 | 87 | 88 | 89 | test = test-1 90 | print (chr(27) + "[1;32m" + "V A L I D S E R I A L S:"+chr(27) + "[0m") 91 | for i in range(48): 92 | print(chr(27) +"[0;33m"+"".join(first[i]*3)+ 93 | "".join(second[i]*2)+"".join(third[i]*1)+"".join(four[i]*1)+"".join(five[i]*1)+"".join(six[i]*1) 94 | +"".join(seven[i]*1)+"".join(eight[i]*1)+"".join(nine[i]*1)+"".join(ten[i]*1)+"".join(eleven[i]*1) 95 | +"".join(twelve[i]*1)+"".join(thirteen[i]*1)+"".join(fourteen[i]*1)+"".join(fifteen[i]*1) 96 | +"".join(sixteen[i]*1)+"".join(seventeen[i]*1)+"".join(eighteen[i]*1)+"".join(nineteen[i]*1) 97 | +"".join(twenty[i]*2)+"".join(twenty_one[i]*3)+chr(27) +"[0m") 98 | 99 | print("--------------------------------") 100 | -------------------------------------------------------------------------------- /X-MAS CTF 2019/LAST_XMAS: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/X-MAS CTF 2019/LAST_XMAS -------------------------------------------------------------------------------- /X-MAS CTF 2019/main: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/X-MAS CTF 2019/main -------------------------------------------------------------------------------- /babyrevjohnson/main: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/babyrevjohnson/main -------------------------------------------------------------------------------- /basic.asm: -------------------------------------------------------------------------------- 1 | ; Assemble: nasm -f elf64 -l reto.lst reto.asm 2 | ; Link: gcc -m64 -o reto reto.o 3 | section .text 4 | global main 5 | main: 6 | mov ecx, 41 ;Mueve 0x29 a ECX 7 | lop: ;Bucle 8 | mov eax, msg ;Mueve la direccion de memoria de msg a EAX 9 | add eax, ecx ;Suma 0x29 a EAX 10 | mov edx, 0 ;Mueve 0 a EDX 11 | mov edx, [eax] ;Mueve el contenido de EAX a EDX 12 | xor edx, 0xb ;Operacion XOR de 0xb con EDX 13 | mov [eax], edx ;Mueve EDX, al contenido de EAX 14 | mov edx, 0 ;Mueve 0 a EDX 15 | mov dx, [eax] ;Mueve el contenido de EAX a DX (Parte baja de EDX, 16 bytes) 16 | rol dx, 0x5 ;Rota 5 bits a la izquierda a DX (16 bits) binary 0b0000000101100000 17 | mov edx, 0 ;Mueve a EDX 0 18 | mov dl, [eax] ;Mueve el contenido de EAX a DL (Parte baja de DX, 8 bytes) 19 | ror dl, 0x9d ;Rota 157 bits a la derecha a DL (8 bits) 20 | sub ecx, 1 ;Contador decrementa valor de msg 21 | cmp ecx, 0 ;Compara si es 0, si es 0 salta 22 | jge lop ;Salto condicional 23 | mov edx, 41 24 | mov ecx, msg 25 | mov ebx, 1 26 | mov eax, 4 27 | int 0x80 28 | mov eax, 1 29 | int 0x80 30 | 31 | section .data 32 | msg db 0x63, 0x64, 0x65, 0x6e, 0x72, 0x68, 0x64, 0x65, 0x39, 0x40, 0x3a, 0x33, 0x70, 0x3a, 0x54, 0x67, 0x3b, 0x7d, 0x38, 0x54, 0x73, 0x33, 0x3d, 0x54, 0x3f, 0x78, 0x78, 0x38, 0x66, 0x69, 0x67, 0x72, 0x54, 0x68, 0x3f, 0x69, 0x38, 0x78, 0x63, 0x3b, 0x76 33 | -------------------------------------------------------------------------------- /entropy/entropy: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/entropy/entropy -------------------------------------------------------------------------------- /entropy/solver.py: -------------------------------------------------------------------------------- 1 | from z3 import * 2 | 3 | def func_input_transf(x): 4 | x = (x * 0x5deece66d + 0xb) & 0xffffffffffff; 5 | return simplify(x) 6 | 7 | input_transf = BitVec("x", 48 ) #creates a bit-vector variable in Z3 named x with 48 BITS 8*6 8 | 9 | #Decrypt 100 times 10 | for i in range(100): 11 | input_transf = func_input_transf(input_transf) 12 | 13 | #But check is just with func_input_transf 100 times, and not xored. 14 | solve(input_transf == 0xfd94e6e84a0a) 15 | #result in decimal, little endian 16 | -------------------------------------------------------------------------------- /r2con2018/disqualified/disqualified: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/r2con2018/disqualified/disqualified -------------------------------------------------------------------------------- /r2con2018/disqualified/disqualified.rr2: -------------------------------------------------------------------------------- 1 | #!/usr/bin/rarun2 2 | program=./disqualified 3 | stdin="AAAA" 4 | stdout= 5 | -------------------------------------------------------------------------------- /r2con2018/disqualified/solve.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | import sys 3 | #r = r2pipe.open( 4 | #filename='', flags=['-d', 'rarun2', 'program=psv', 'stdin="r2con{"']) 5 | r = r2pipe.open("./disqualified") 6 | r.cmd('e dbg.profile=disqualified.rr2') 7 | r.cmd('doo') #initially you are debuggign rarun2 8 | r.cmd('db main') #Random memory address code so setting bp in main 9 | r.cmd('dc') 10 | #print r.cmd('drj') 11 | 12 | 13 | #STAGE 1 14 | if sys.argv[1] == "stage1": 15 | print (chr(27) + "[1;36m" + "[+] STAGE 1 - RECON: Getting key and xor 4 bytes with function prelude opcodes:554889e5" + chr(27) + "[0m") 16 | while True: 17 | list_ = [] 18 | disass = [] 19 | chrlist = [] 20 | if r.cmdj('drj')["rcx"] == 196: 21 | break 22 | while True: 23 | instruction = r.cmdj('pdj 1')[0] 24 | disass.append(instruction['opcode']) 25 | #RECON: Getting key and xor 4 bytes with function prelude opcodes:554889e5 26 | #push rbp 27 | #mov rbp, rsp 28 | if instruction['opcode'] == "movzx eax, byte [rax]": 29 | if r.cmdj('drj')["rcx"] == 28: 30 | print(instruction['opcode']) 31 | print(r.cmdj('drj')["rcx"]) 32 | xor = r.cmdj('drj')["rcx"] ^ 85 33 | list_.append(xor) 34 | elif r.cmdj('drj')["rcx"] == 101: 35 | print(instruction['opcode']) 36 | print(r.cmdj('drj')["rcx"]) 37 | xor = r.cmdj('drj')["rcx"] ^ 72 38 | list_.append(xor) 39 | elif r.cmdj('drj')["rcx"] == 197: 40 | print(instruction['opcode']) 41 | print(r.cmdj('drj')["rcx"]) 42 | xor = r.cmdj('drj')["rcx"] ^ 137 43 | list_.append(xor) 44 | elif r.cmdj('drj')["rcx"] == 196: 45 | print(instruction['opcode']) 46 | print(r.cmdj('drj')["rcx"]) 47 | xor = r.cmdj('drj')["rcx"] ^ 229 48 | list_.append(xor) 49 | #print(list_) 50 | for x in range(len(list_)): 51 | #print(chr(int(list_[x]))) 52 | chrlist.append(chr(int(list_[x]))) 53 | print (chr(27) + "[0;33m" + "\tFirst characters of flag: "+"".join(chrlist)+chr(27) + "[0m") 54 | break 55 | r.cmd('ds') 56 | r.cmd('sr rip') 57 | 58 | #STAGE 2 59 | elif sys.argv[1] == "stage2": 60 | print (chr(27) + "[1;36m" + "[+] STAGE 2 - SOLVE: Getting the next keys using the previous part of flag and xor 4 bytes with function prelude opcodes:554889e5" + chr(27) + "[0m") 61 | while True: 62 | list_ = [] 63 | disass = [] 64 | chrlist = [] 65 | opcodes = [85,72,137,229] #function prelude opcodes 66 | if r.cmdj('drj')["rax"] == 72: 67 | break 68 | while True: 69 | instruction = r.cmdj('pdj 1')[0] 70 | disass.append(instruction['opcode']) 71 | #SOLVE: Getting the next keys using the previous part of flag and xor 4 bytes with function prelude opcodes:554889e5 72 | #push rbp 73 | #mov rbp, rsp 74 | if instruction['opcode'] == "mov esi, eax": 75 | if r.cmdj('drj')["rax"] == 72: 76 | r.cmd('ds') 77 | r.cmd('sr rip') 78 | print("[+]Getting instruction: "+instruction['opcode']) 79 | #print(r.cmdj("drj")["rdi"]) 80 | dir_addr = hex(r.cmdj("drj")["rdi"]-664) #0x298 = Distance to get the next memory address whose content is the key 81 | print("[+]Memory address of key: "+dir_addr) 82 | key = r.cmdj("pxj 4 @%s"%dir_addr) 83 | for x in range(len(key)): 84 | xor = int(key[x]) ^ opcodes[x] 85 | chrlist.append(chr(xor)) 86 | print (chr(27) + "[0;33m" + "\tNext 4 Bytes of flag: "+"".join(chrlist)+chr(27) + "[0m") 87 | dir_ = r.cmdj("drj")["rdi"]-664-72 #We realize that the distance to get the other keys it is at 0x48 88 | print("[+]Memory address of key: "+hex(dir_)) #So we just need to subtraction 0x48 each time and xored for getting the flag 89 | for x in range(4): 90 | chrlist = [] 91 | key = r.cmdj("pxj 4 @%s"%dir_) 92 | for x in range(len(key)): 93 | xor = int(key[x]) ^ opcodes[x] 94 | chrlist.append(chr(xor)) 95 | print (chr(27) + "[0;33m" + "\tNext 4 Bytes of flag: "+"".join(chrlist)+chr(27) + "[0m") 96 | dir_ = dir_-72 97 | print("[+]Memory address of key: "+hex(dir_)) 98 | break 99 | r.cmd('ds') 100 | r.cmd('sr rip') 101 | -------------------------------------------------------------------------------- /r2con2018/forceme/forceme: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/r2con2018/forceme/forceme -------------------------------------------------------------------------------- /r2con2018/forceme/reverse-brute.py: -------------------------------------------------------------------------------- 1 | import random 2 | import sys 3 | 4 | def check_key(key): 5 | char_sum = 0 6 | for c in key: 7 | char_sum += ord(c) 8 | sys.stdout.write("{0:3} | {1} \r".format(char_sum, key)) 9 | sys.stdout.flush() 10 | return char_sum 11 | 12 | 13 | #REVERSE ENGINEERING 14 | #password = [101,115,105,108,114,117,108,101,122] #Solve it 15 | key_ = [0x90, 0xa6, 0x9c, 0x99, 0xa7, 0xa0, 0x99, 0x90, 0xaf] 16 | 17 | #SYM.CODE 18 | def code(): 19 | i = 0 20 | list_ = [] 21 | while True: 22 | key = "" 23 | key += random.choice("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_!$%&#'()*+,./:;<>=?@[]`{~}\"") 24 | local14 = check_key(key) 25 | local8 = 7 #mov dword [local_8h], 7 26 | local4 = 69 #mov dword [local_4h], 0x45 27 | shl = local8<<4 #shl eax,4 28 | xor = local14 ^ local4 29 | add = xor + shl 30 | if add == key_[i]: 31 | list_.append(chr(local14)) 32 | #print hex(add) 33 | if key_[i] == 0xaf: 34 | return list_ 35 | i += 1 36 | 37 | if __name__ == "__main__": 38 | hardcoded_check = code() 39 | print("Flag -->"+"".join(hardcoded_check)) 40 | -------------------------------------------------------------------------------- /r2con2018/forceme/reverse.py: -------------------------------------------------------------------------------- 1 | #REVERSE ENGINEERING 2 | password = [101,115,105,108,114,117,108,101,122] #Solve it 3 | 4 | 5 | #SYM.CODE 6 | def code(): 7 | list_ = [] 8 | for i in range(len(password)): 9 | local14 = password[i] 10 | local8 = 7 #mov dword [local_8h], 7 11 | local4 = 69 #mov dword [local_4h], 0x45 12 | shl = local8<<4 #shl eax,4 13 | xor = password[i] ^ local4 14 | add = xor + shl 15 | list_.append(hex(add)) 16 | #print hex(add) 17 | 18 | return list_ 19 | 20 | if __name__ == "__main__": 21 | hardcoded_check = code() 22 | print(hardcoded_check) 23 | 24 | -------------------------------------------------------------------------------- /r2con2018/psv/psv: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/r2con2018/psv/psv -------------------------------------------------------------------------------- /r2con2018/psv/solve.py: -------------------------------------------------------------------------------- 1 | import r2pipe 2 | 3 | #r = r2pipe.open( 4 | #filename='', flags=['-d', 'rarun2', 'program=psv', 'stdin="r2con{"']) 5 | r = r2pipe.open("./psv") 6 | r.cmd('e dbg.profile=psv.rr2') 7 | r.cmd('doo') # initially you are debugging rarun2 8 | r.cmd('db 0x0040084a') 9 | r.cmd('dc') 10 | #print r.cmd('drj') 11 | def step(): 12 | r.cmd('ds') 13 | r.cmd('sr rip') 14 | while True: 15 | list_ = [] 16 | disass = [] 17 | if r.cmd('dr rdx') == "0x0000ffff": 18 | break 19 | while True: 20 | instruction = r.cmdj('pdj 1')[0] 21 | disass.append(instruction['opcode']) 22 | if instruction['type'] == 'xor': 23 | print("[+] RDX Value: "+r.cmd('dr rdx')+" RCX Value: "+r.cmd('dr rcx')+" RAX Value: "+r.cmd('dr rax')) 24 | xor = int(r.cmd('dr rdx'),16)^int(r.cmd('dr rax'),16) #xor operation to get password 25 | if xor > 256: 26 | print("\tNon chr") 27 | else: 28 | print (chr(27) + "[0;33m" + "\tXOR Operation RAX ^ RDX: " +chr(xor)+chr(27) + "[0m") 29 | value = r.cmdj('drj')["rcx"] 30 | list_.append(value) 31 | 32 | elif r.cmd('dr rdx') == "0x0000ffff": 33 | #print(list_) 34 | break 35 | step() 36 | -------------------------------------------------------------------------------- /r2con2018/scrabble/reverse-brute.py: -------------------------------------------------------------------------------- 1 | import random 2 | import sys 3 | 4 | #REVERSE ENGINEERING 5 | key_ = [87,107,50,112,50,112,109,51,119,103,55,101,111,55,100] #key 6 | #password = [84,104,49,115,49,115,110,48,116,100,52,102,108,52,103] 7 | def check_key(key): 8 | char_sum = 0 9 | for c in key: 10 | char_sum += ord(c) 11 | sys.stdout.write("{0:3} | {1} \r".format(char_sum, key)) 12 | sys.stdout.flush() 13 | return char_sum 14 | 15 | def main(): 16 | i = 0 17 | list_ = [] 18 | while True: 19 | key = "" 20 | key += random.choice("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_!$%&#'()*+,./:;<>=?@[]`{~}\"") 21 | password = check_key(key) 22 | local18 = 0 23 | xor = key_[i] ^ 3 #xor eax, 3 24 | local14 = xor-password #sub edx, eax 25 | #print("Distance: "+str(local14)) 26 | if local14 == 0: #cmp dword [local_14h], 0 Compare to win 27 | list_.append(chr(xor)) 28 | print("Distance: "+str(local14)) 29 | if key_[i] == 100: 30 | return list_ 31 | i += 1 32 | if __name__ == "__main__": 33 | print("For win the distance has to be = 0 cmp dword [local_14h], 0") 34 | hardcoded_check = main() 35 | print("Flag --> "+"".join(hardcoded_check)) 36 | -------------------------------------------------------------------------------- /r2con2018/scrabble/reverse.py: -------------------------------------------------------------------------------- 1 | #REVERSE ENGINEERING 2 | key = [87,107,50,112,50,112,109,51,119,103,55,101,111,55,100] #key 3 | password = [84,104,49,115,49,115,110,48,116,100,52,102,108,52,103] 4 | 5 | 6 | def main(): 7 | list_ = [] 8 | local18 = 0 9 | for i in range(len(key)): 10 | xor = key[i] ^ 3 #xor eax, 3 11 | resta = xor-password[i] #sub edx, eax 12 | local14 = resta 13 | print("Distance: "+str(local14)) 14 | if local14 == 0: #cmp dword [local_14h], 0 Compare to win 15 | list_.append(hex(xor)) 16 | 17 | return list_ 18 | 19 | if __name__ == "__main__": 20 | print("For win the distance has to be == 0 #cmp dword [local_14h], 0") 21 | hardcoded_check = main() 22 | print(hardcoded_check) 23 | -------------------------------------------------------------------------------- /r2con2018/scrabble/scrabble: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/naivenom/reversing-list/aeba6c734770ccac2824fb12f351a526e019f474/r2con2018/scrabble/scrabble -------------------------------------------------------------------------------- /whats-a-rune/chall.py: -------------------------------------------------------------------------------- 1 | def decrypt_flag(encrypted_flag): 2 | runed = [] 3 | z = "\x00" 4 | 5 | for v in encrypted_flag: 6 | runed.append(chr(ord(v) - ord(z))) 7 | z = runed[-1] 8 | 9 | return ''.join(runed) 10 | 11 | def main(): 12 | try: 13 | with open("the", "r") as file: 14 | encrypted_flag = file.read().strip() 15 | flag = decrypt_flag(encrypted_flag) 16 | print("Decrypted flag: ", flag) 17 | except Exception as e: 18 | print(e) 19 | finally: 20 | file.close() 21 | 22 | if __name__ == "__main__": 23 | main() 24 | 25 | -------------------------------------------------------------------------------- /whats-a-rune/main-chall.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "os" 6 | "strings" 7 | ) 8 | 9 | var flag = "irisctf{this_is_not_the_real_flag}" 10 | 11 | 12 | func main() { 13 | runed := []string{} 14 | z := rune(0) 15 | 16 | for _, v := range flag { 17 | fmt.Println("v+z :",v+z) 18 | runed = append(runed, string(v+z)) 19 | fmt.Println("z :",z) 20 | fmt.Println("v :",v) 21 | fmt.Println("runed :",runed) 22 | z = v 23 | } 24 | 25 | flag = strings.Join(runed, "") 26 | fmt.Println(runed) 27 | fmt.Println("asdasd") 28 | file, err := os.OpenFile("the", os.O_RDWR|os.O_CREATE, 0644) 29 | if err != nil { 30 | fmt.Println(err) 31 | return 32 | } 33 | 34 | defer file.Close() 35 | if _, err := file.Write([]byte(flag)); err != nil { 36 | fmt.Println(err) 37 | return 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /whats-a-rune/the: -------------------------------------------------------------------------------- 1 | iÛÛÜÖ×ÚáäÈÑ¥gebªØšÔž’Íãâ£i¥§²ËÅÒÍÈä --------------------------------------------------------------------------------