deayzl's blog

This challenge is easy but there were some mistakes so I couldn't solve it quickly.I think I need to practice taking care of details of my solve script fast.Recently, I'm even thinking of solving leetcode thanks to my poor script writing skills :( This challenge is in c++ and uses std::variant, std::_Function_base::_Base_manager, blahblahblah.The tricky point of this challenge is that it impleme..

It was a simple challenge using clamav which parses a binary in a specific rule. https://github.com/Cisco-Talos/clamav GitHub - Cisco-Talos/clamav: ClamAV - Documentation is here: https://docs.clamav.netClamAV - Documentation is here: https://docs.clamav.net - Cisco-Talos/clamavgithub.com run.sh:#!/bin/shdocker run -v /home/ctf/clamav/:/test/ --rm -it clamav/clamav clamscan --bytecode-unsigned -..

The binary consists of two functions; main and main[cold]. main: int __cdecl main(int argc, const char **argv, const char **envp) { __int64 v3; // rax char *v4; // rdi char *v5; // rdx char *v6; // rax __int64 v7; // rsi __int64 v8; // rcx signed __int64 v9; // rbx signed __int64 v10; // rax size_t v11; // rdx char *v12; // rsi __int64 v13; // rbx int v14; // ebp char v15; // cl int *v16; // rdi..

I did play this ctf as team 프로그램털모찌.It was about 7 am for me in korea when I solved this.I spent the night with no sleep. Then I fell asleep right after I solved this.I realized that.. guys, try to sleep at the appropriate time, or you gon miss upcoming challenges.When I opened my eyes, there was already "subformore" released long time ago :((this is why I could only give an aaw primitive functi..

box.c : // gcc box.c -o box -no-pie #include #include #include #include #include #include #include #include #define FLAG_PATH "/flag" int install_seccomp(uint8_t *filt, unsigned short len); void vuln(); void read_flag(); uint32_t target = 0xdead; int main(int argc, char **argv) { uint32_t filt_len; setvbuf(stdin, NULL, _IONBF, 0); setvbuf(stdout, NULL, _IONBF, 0); setvbuf(stderr, NULL, _IONBF, 0..

Tool: ghidra 10.2.2 with GolangAnalyzerExtension Exploit: making utf-8 shellcode (pwnable) feat. I've never written any code in go language, so all of these are from internet references and quite a lot of my predictions. So there might be something wrong with my analysis. /* WARNING: Unknown calling convention */ /* Name: main.handleConnection Start: 004cd140 End: 004cdb00 */ void main.handleCon..