Defeat IsDebuggerPresent
reverse · medium · +45 XP
Target
GET /api/lab/antidbg-101/disasm (call site + surrounding code)
POST /api/lab/antidbg-101/patch body {addr, bytes_hex} (apply patch + run)
Goal: at 0x401080 the code does call IsDebuggerPresent; test eax,eax; jnz die. Patch the test (85 c0) at 0x401087 to xor eax,eax (31 c0). Submit addr+bytes_hex.
// AI hint · first is free · then 1 credit or 5 XP
// attack console
/api/lab/antidbg-101/
// reuse on the cli
// submit flag
// no solves yet
8 of 12 · reverse