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[C++] PatternFind (Pattern Find + Search & Replace)


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Hello everyone,

For x64_dbg I had to create a pattern finder and mudlord asked me to extend it with a pattern search & replace ability.

Example of usage:

#include "patternfind.h"int main(int argc, char* argv[]){    unsigned char data[0x100];    memcpy(data, main, sizeof(data));    //find pattern offset    size_t found = patternfind(data, sizeof(data), "68 ?? ?1 0? 00");    printf("found: main+%p\n", found);    if(found==-1) //not found        return 0;    //print current data    for(int i=0; i<5; i++)        printf("%.2X ", data[found+i]);    puts("");    //search & replace    if(!patternsnr(data, sizeof(data), "68 ?? ?1 0? 00", "?? ?1 1? 21 23"))        return 0; //search & replace failed    //print replaced data    for(int i=0; i<5; i++)        printf("%.2X ", data[found+i]);    puts("");    return 0;}
found: main+0000002668 00 01 00 0068 01 11 21 23
Feel free to use it wherever you like, credit (link to http://x64dbg.com) is appreciated, but not required.

Attached the full source (only ~150 lines)


Mr. eXoDia


  • Like 7
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  • 5 weeks later...

@newbie_newbe: just add the .cpp and .h file to your coding project and include the .h file.

This is not useful if you want some GUI or anything, just for coding projects that require a pattern searcher.


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  • 1 month later...
  • 1 month later...

thanks, it's nicer than the code i use.  i wrote a little tool that uses BeaEngine to hook anywhere in code, and i use a few different pattern matching algorithms to find my hook targets.

Edited by electroglyph
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