https://ihuomtia.fyi Last 10 notes on ihuomtia's blog Quartz -- quartz.jzhao.xyz https://ihuomtia.fyi/ https://ihuomtia.fyi/ Welcome to ihuomtia's blog ᕙ(⇀‸↼‶)ᕗ 🇵🇸 Free Palestine 🇵🇸 . Wed, 17 Jun 2026 15:26:48 GMT https://ihuomtia.fyi/contact https://ihuomtia.fyi/contact Email You can contact me via this email: contact[at]ihuomtia{dot}fyi Public key -----BEGIN PGP PUBLIC KEY BLOCK----- mQINBGkMcYwBEADGXd/LJC8FwdA+nc+u3oH/hET2QnWHHdcTXwKvE0HXoM6Zo6Pn /0KhGnPZ3AMbEMmlaZQTRxH3UiNStpK0Nma4p1PW5bXsnMCxv/sLG57grk57x15r gvXOcJEInsIJCtgJx2ufrMjOjOHheYHDEEDRPImb6bSb4wakKkRiA... Wed, 17 Jun 2026 15:26:48 GMT https://ihuomtia.fyi/about https://ihuomtia.fyi/about Me イフオムティア Embedded Systems Engineer | Offensive Security Consultant I’m a cybersecurity enthusiast with an engineering degree in embedded systems. Wed, 17 Jun 2026 15:26:47 GMT https://ihuomtia.fyi/buckeye-forensics-heap-exploitation https://ihuomtia.fyi/buckeye-forensics-heap-exploitation Recovering a file from a core dump of a crashed process by dumping the heap memory regions, and then stitching the fragmented file contents back together. Mon, 10 Nov 2025 00:00:00 GMT https://ihuomtia.fyi/why2025-rev-zenmaster https://ihuomtia.fyi/why2025-rev-zenmaster Analysis of a Base64-encoded ELF execution service, bypassing restrictions, and reverse-engineering AMD microcode to recover the flag (unintended solution). Sun, 10 Aug 2025 00:00:00 GMT https://ihuomtia.fyi/ductf-pwn-fakeobj-py https://ihuomtia.fyi/ductf-pwn-fakeobj-py Exploiting Python object internals to hijack the __repr__ function pointer, redirecting execution to system("/bin/sh") for a shell, with adjustments for version-specific memory layouts. Mon, 21 Jul 2025 00:00:00 GMT https://ihuomtia.fyi/umass-hw-hidden-in-flash https://ihuomtia.fyi/umass-hw-hidden-in-flash Extracting data from a CAT24C64B EEPROM via custom ATmega328P I2C firmware, dumping its contents, discovering it’s a SWF file, and analyzing it to reveal the hidden flag. Mon, 21 Apr 2025 00:00:00 GMT https://ihuomtia.fyi/uoftctf-rev-py_flagchecker https://ihuomtia.fyi/uoftctf-rev-py_flagchecker Extracting and defeating a self-referential Python flag checker that uses version-specific marshal bytecode and anti-tampering keys by building a custom Python 3.10.12 interpreter with added debug prints to reveal the decrypted flag. Mon, 13 Jan 2025 00:00:00 GMT https://ihuomtia.fyi/uiuctf-rev-summarize https://ihuomtia.fyi/uiuctf-rev-summarize A stripped binary hides a flag behind complex modular arithmetic, requiring the discovery of six precise nine-digit integers to unlock it. Tue, 02 Jul 2024 00:00:00 GMT https://ihuomtia.fyi/uiuctf-pwn-syscalls https://ihuomtia.fyi/uiuctf-pwn-syscalls A seccomp-restricted binary forces the use of only safe syscalls (openat, preadv2, dup2, and writev) to craft shellcode that reads flag.txt and prints its contents despite strict syscall filtering. Mon, 01 Jul 2024 00:00:00 GMT