ATHERCRC32 Provide developers with a complete framework for using CRC32 in functions/classes in memory, and protecting your software against WriteProcessMemory or changes during execution in memory, protecting your intellectual property.
6 |
7 |
Very simple to use
8 |
9 | ```c++
10 | //__________________________________
11 | // INCLUDE FOR ATHERCRC32 LIB
12 | //__________________________________
13 | #include "includes/ATHERCRC32.h"
14 | //__________________________________
15 |
16 | // Create an ATHERCRC instance
17 | ATHERCRC32* ATHERCRC = new ATHERCRC32();
18 | ATHERCRC32_WARNING* ATHERCRCWARNING = new ATHERCRC32_WARNING();
19 |
20 | //Simple steps to implement for functions that are not class members
21 |
22 | // We get the size of the process memory function
23 | unsigned int iTamanho = ATHERCRC->obtemTamanhoDeUmaFuncaoDaMemoria(minhaFuncao);
24 |
25 | // We calculate the CRC32
26 | uint32_t CRC32MinhaFuncao = ATHERCRC->calcularCRC32DEUMAFUNCAO(minhaFuncao, iTamanho);
27 |
28 | // Even simpler implementation for methods and classes
29 |
30 | // Getting a pointer to a specific method / function of a class
31 | auto pFuncaoParaVoidCasting = ATHERCRC->pvoid_cast(&MyClassTest::MyFunction);
32 |
33 | // Calculating the size in memory
34 | iTamanho = ATHERCRC->obtemTamanhoDeUmaFuncaoDaMemoria(pFuncaoParaVoidCasting);
35 |
36 | // Calculating the CRC32
37 | CRC32MinhaFuncao = ATHERCRC->calcularCRC32DEUMAFUNCAO(pFuncaoParaVoidCasting, iTamanho);
38 |
39 | ```
40 |
41 |
Simple to implement and much simpler to detect
42 |
43 | ```c++
44 | // It will be displayed and calculated that the CRC32 of the memory block is wrong and has been changed
45 | // Just detect, and writes to the console that a change was found in the process memory block.
46 | ATHERCRCWARNING->AntiMemoryWriteDectLite(minhaFuncao, iTamanho, CRC32MinhaFuncao);
47 |
48 | // It will be displayed and calculated that the CRC32 of the memory block is correct
49 | //You can assign between true and false if you want to show a warning to your user.
50 | ATHERCRCWARNING->AntiMemoryWriteDetect(minhaFuncao, iTamanho, CRC32MinhaFuncao, true);
51 | ```
52 |
53 |
See protection working
54 |
55 |
56 |
57 | In this example using the x32dbg tool I found the memory pointer of a string that I would like to modify
58 |
59 |
60 |
61 |
62 | I decided to modify the function and its received parameters and its strings
63 |
64 |
65 |
66 |
67 | After making some modifications, and cracking attempts and changes in the process memory
68 |
69 |
70 |
71 |
72 |
73 | I decided to run the software after my modifications and I was detected and the software was protected from my attack.
74 |
75 |
76 |
Copyright (C) Keowu | ATHERCRC32 OpenSource | please leave a like in the repository if this library is useful for you
77 |
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/CRC32_SOFTWARE_SECURITY.vcxproj:
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1 |
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5 | Debug
6 | Win32
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8 |
9 | Release
10 | Win32
11 |
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13 | Debug
14 | x64
15 |
16 |
17 | Release
18 | x64
19 |
20 |
21 |
22 | 16.0
23 | Win32Proj
24 | {d614cd1e-e6b1-403e-a93f-53a302160f7d}
25 | CRC32SOFTWARESECURITY
26 | 10.0
27 |
28 |
29 |
30 | Application
31 | true
32 | v142
33 | Unicode
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36 | Application
37 | false
38 | v142
39 | true
40 | Unicode
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49 | Application
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87 | Level3
88 | true
89 | WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
90 | true
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94 | true
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100 | true
101 | true
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103 | WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
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108 | true
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116 | true
117 | _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
118 | true
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127 | Level3
128 | true
129 | true
130 | true
131 | NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
132 | true
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469 | sale, or importing the Program or any portion of it.
470 |
471 | 11. 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. For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 |
487 | Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 |
492 | In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement). To "grant" such a patent license to a
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497 | patent against the party.
498 |
499 | If you convey a covered work, knowingly relying on a patent license,
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503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
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509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
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512 |
513 | If, pursuant to or in connection with a single transaction or
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520 |
521 | A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License. You may not convey a covered
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526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
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529 | parties who would receive the covered work from you, a discriminatory
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534 | or that patent license was granted, prior to 28 March 2007.
535 |
536 | Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 |
540 | 12. 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
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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
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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
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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. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. 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 |
--------------------------------------------------------------------------------
/CRC32_SOFTWARE_SECURITY.cpp:
--------------------------------------------------------------------------------
1 | /*****************************************************************************************
2 | * GNU GENERAL PUBLIC LICENSE *
3 | * Version 3, 29 June 2007 *
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675 | *. *
676 | * *
677 | * *
678 | * _ *
679 | * _. .' `-. *
680 | * .' `-.::/_. `. *
681 | * / _. .' \ *
682 | * .' .'\ `./ `. \ *
683 | * .-' / '. .'. \ ; *
684 | * .-' .-' \ .' \ . | *
685 | * .-' .' .-._'_.-. \ . : *
686 | * / / .-' ' `. '. \ : *
687 | * : : / `. '. `. /| *
688 | * \ | / /`. '-. `-._.' ; *
689 | * ; | .; : \ '-. / *
690 | * `. / :.'/ _ _ \ \ \ _.' *
691 | * \`._.' // : .s$$P T$$s. '. \ ; \ *
692 | * `._. .': | .dP' `Tb. \ \ | `. *
693 | * / / | | dP .-. .-. Tb ; . | `-. *
694 | * `_.' : | |' 'd$b d$b` `|` | | | `. *
695 | * '. | | : ':$$$ $$$:` '\ | ' /| \ *
696 | * `-'| | :` ; |T$P T$P| : ' :| / .' ; ; *
697 | * : : \\`-:__. .__:-'/ .' |.'\_.' / | *
698 | * /\ \ .\ s / : /| / : *
699 | * . '. \ | \ .___. / \ : | .' / *
700 | * .' \ 'X '. .'\ '.\|\.-' .' *
701 | * .' \ '. |`. .'| : `.'. .-'| *
702 | * / ' '-: `-._.-'; | `. \ '-.' ; *
703 | * : ' \ / |--.._J.-. '. './ -. *
704 | * \ \ \ : / . `-. \ '. \`. *
705 | * `. . ; ; / `-. `-.; \ : . *
706 | * `-._.' | | __/ /| \._.' ' *
707 | * .' . ; : _.-"'.' .: | ; / *
708 | * / |\ / / .' .-' .-' \| | / *
709 | * / : '._.' .'. .' / .-' .' : .' *
710 | * : \ .'-. `. .' .-' .-' / /"' *
711 | * .:' | |`-.__.-'`-. \_ `s'.-' .-' / .' *
712 | * .'/ : : `._.' `._.-' : .-' *
713 | * .' : \ \ `._.' | ( *
714 | *. : /`. `-. ;|: [bug] : \ *
715 | *: `._.' `-._ `-. , : . |\ '. *
716 | * `. `. `. ;'. ; ' `. `-.__. *
717 | * `-._ _.' ;\ `. | : | / `*+.__.-' *
718 | * .' `"' / ; \ |.' | ' *
719 | * / .' | . : ` ;--._ _.-' *
720 | * / : _.-' : | \ / *
721 | *: |\ / ; V *
722 | *| `.`. _.' / *
723 | *: \ `-.._.-' .' *
724 | * *
725 | * *
726 | * *
727 | * ___ _____ _ _ ___________ _____ ______ _____ _____ _____ *
728 | * / _ \_ _| | | || ___| ___ \ / __ \| ___ \/ __ \ |____ |/ __ \ *
729 | * / /_\ \| | | |_| || |__ | |_/ / ______ | / \/| |_/ /| / \/ / /`' / /' *
730 | * | _ || | | _ || __|| / |______| | | | / | | \ \ / / *
731 | * | | | || | | | | || |___| |\ \ | \__/\| |\ \ | \__/\ .___/ /./ /___ *
732 | * \_| |_/\_/ \_| |_/\____/\_| \_| \____/\_| \_| \____/ \____/ \_____/ *
733 | * *
734 | * *
735 | * *
736 | * *
737 | * *
738 | * Copyright (C) 2021 by Keowu *
739 | * Contact me: joaovitordev@protonmail.ch *
740 | * www.joaovitor.gq *
741 | * www.github.com/keowu *
742 | * *
743 | ******************************************************************************************/
744 | #include
745 |
746 | //__________________________________
747 | // INCLUDE FOR ATHERCRC32 LIB
748 | //__________________________________
749 | #include "includes/ATHERCRC32.h"
750 | //__________________________________
751 |
752 | //Test header
753 | //__________________________________
754 | #include "CRC32_SOFTWARE_SECURITY.h"
755 | //__________________________________
756 |
757 | #include
758 |
759 | bool minhaFuncao() {
760 | std::cout << "Hi, from ATHER CRC32" << std::endl;
761 | return false;
762 | }
763 |
764 | void minhaFuncaoErrada() {
765 | int i = 0;
766 | }
767 |
768 |
769 | void MyClassTest::MyFunction() {
770 | std::cout << "Class, CRC32 :) WITH ANY TYPE !" << std::endl;
771 | }
772 |
773 |
774 | int main()
775 | {
776 | // Set Locale VS2019
777 | setlocale(LC_ALL, ".utf8");
778 |
779 | std::cout << "Hello World! from João Ferreira(@keowu teste) | Hello, from ATHERCRC32 :) \n";
780 |
781 | // Create an ATHERCRC instance
782 | ATHERCRC32* ATHERCRC = new ATHERCRC32();
783 | ATHERCRC32_WARNING* ATHERCRCWARNING = new ATHERCRC32_WARNING();
784 |
785 | // We get the size of the process memory function
786 | unsigned int iTamanho = ATHERCRC->obtemTamanhoDeUmaFuncaoDaMemoria(minhaFuncao);
787 |
788 | // We write the size for testing
789 | std::cout << "My function size of" << std::hex << iTamanho << std::endl;
790 |
791 | // We calculate the CRC32
792 | uint32_t CRC32MinhaFuncao = ATHERCRC->calcularCRC32DEUMAFUNCAO(minhaFuncao, iTamanho);
793 |
794 | /// ________________________________________________________________
795 | ///
796 | /// Chamadas para as funções desejadas
797 | ///
798 | /// ________________________________________________________________
799 | minhaFuncao();
800 |
801 | minhaFuncaoErrada();
802 | /// ________________________________________________________________
803 |
804 | // We write the CRC32 value from the process memory
805 | std::cout << "The CRC32 is: " << std::hex << CRC32MinhaFuncao << std::endl;
806 |
807 | // It will be displayed and calculated that the CRC32 of the memory block is correct
808 | ATHERCRCWARNING->AntiMemoryWriteDectLite(minhaFuncao, iTamanho, CRC32MinhaFuncao);
809 |
810 | // It will be displayed and calculated that the CRC32 of the memory block is wrong and has been changed
811 | ATHERCRCWARNING->AntiMemoryWriteDectLite(minhaFuncaoErrada, iTamanho, CRC32MinhaFuncao);
812 |
813 | // It will be displayed and calculated that the CRC32 of the memory block is correct
814 | ATHERCRCWARNING->AntiMemoryWriteDetect(minhaFuncao, iTamanho, CRC32MinhaFuncao, true);
815 |
816 | // It will be displayed and calculated that the CRC32 of the memory block is wrong and has been changed and terminates the application
817 | ATHERCRCWARNING->AntiMemoryWriteDetect(minhaFuncaoErrada, iTamanho, CRC32MinhaFuncao, true);
818 |
819 | //________________________CRC-32 FOR CLASSES OR NON VOID FUNCTIONS
820 |
821 | // Test class instance
822 | MyClassTest *myclass = new MyClassTest();
823 |
824 | // Getting a pointer to a specific method / function of a class
825 | auto pFuncaoParaVoidCasting = ATHERCRC->pvoid_cast(&MyClassTest::MyFunction);
826 |
827 | // Calculating the size in memory
828 | iTamanho = ATHERCRC->obtemTamanhoDeUmaFuncaoDaMemoria(pFuncaoParaVoidCasting);
829 |
830 | // Calculating the CRC32
831 | CRC32MinhaFuncao = ATHERCRC->calcularCRC32DEUMAFUNCAO(pFuncaoParaVoidCasting, iTamanho);
832 |
833 | std::cout << "The CRC32 of my nonvoid function is: " << std::hex << CRC32MinhaFuncao << std::endl;
834 |
835 | // Validating to see if there were any changes in memory in a LITE way
836 | ATHERCRCWARNING->AntiMemoryWriteDectLite(pFuncaoParaVoidCasting, iTamanho, CRC32MinhaFuncao);
837 |
838 | // Validating to see if there were any changes in memory in a HARD way
839 | ATHERCRCWARNING->AntiMemoryWriteDetect(pFuncaoParaVoidCasting, iTamanho, CRC32MinhaFuncao, true);
840 |
841 | }
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4 | 
57 | In this example using the x32dbg tool I found the memory pointer of a string that I would like to modify
58 | 
62 | I decided to modify the function and its received parameters and its strings
63 | 
67 | After making some modifications, and cracking attempts and changes in the process memory
68 | 