deayzl's blog

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 f..

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..

이름: 안현준 대학: 단국대학교 사이버보안학과 23학번 나이: 2003년생 소속: cat :flag_kr: 취미: 음악 듣기(발라드 제외), 게임, 해킹, 해외 축구 시청 좋아하는 분야: Pwn, Rev Education: 202201 학기, POCU Academy COMP3200 - 알고리듬 및 자료구조 (Java) (성적: 80%) 202205 학기, POCU Academy COMP3500 - C++ Unmanaged Programming (성적: 91%) 수료 2023.07 ~ 2024.03 , BoB 12th 취약점분석트랙 (top30) Career: Dreamhack CTF Season 2 Rank 11th Dreamhack CTF Season 3 Rank 6th 2023.08 ~ , ctf t..

files: encrypt.c, isThisFileUseful.txt, justBinaries.txt, up_down.py isThisFileUseful.txt: 1001010110001010100011001000101110011110100101001001101010000110 justBinaries.txt: 11110100000101010111111101110011111001001101000010001101101101001100101100000111111110100111000110000001100011011111111101000010001101101100010110100100101100111110000111011111111001001000101010010100100011100000010100010010..