shellcode-bad-char-detector

Find bad chars in your shellcode

How to use

• Locate your shellcode in memory using WinDbg.
• Copy the hexdump dd eip L100 into the bad_chars_hunter.py file
• Add your msfvenom output too
• Set the aligner to bypass any nops
• Run
• Copy entire console output into CyberChef->Diff
• Diff by Word

Bad chars can cause subsequent bytes to get mangled or just cause it to be replaces with another.