1GN1tE / CTF_Writeups

Writeups of some Reverse Engineering challenges in CTFs I played

Writeups

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BambooFox CTF 2021

• Flag Checker Tags: Verilog
• Better Than ASM Tags: LLVM

JustCTF[*] 2020

• That's not crypto Tags: Python
• reklest Tags: Rust, JavaScript
• debug_me_if_you_can Tags: ptrace, anti-re
• Rusty Tags: Rust, DOS, PE file structure
• ABNF: grammar is fun Tags: Regex in C++
• REmap Tags: Py2exe, Anti-Re in python.dll

Aero CTF 2021

• Dummyper Tags: memdump, crypto

zer0pts CTF 2021

• Infected Tags: Character Device
• Super Secret Login Tags: AutoIt, Cheat Engine
• Syscall 777 Tags: syscall, SECCOMP, BPF

BsidesSF 2021 CTF

• Keygenme Tags: keygen, .NET
• Relaunch Tags: Bindiff

UTCTF 2021

• UTCTF Adventure ROM Part 3 Tags: GameBoy

BlueHens (UDCTF) 2021

• compUDer Tags: VM
• watman Tags: wasm
• Entropy Tags:

VolgaCTF 2021 Qualifier

• Snake Tags: wasm, game

UMassCTF 2021

• Chains Tags: ARM, optimize me

ångstromCTF 2021

• Infinity Gauntlet Tags: PPC
• FLag Submission Server Tags: server binary
• Lockpicking Tags: virtual lock
• Dysfunctional Tags: dynamic encryption

Midnight Sun CTF 2021 Quals

• murmur Tags: hash
• Blueberry Pop Tags: time based enc
• oVER9000 Tags: custom stream cipher

S4CTF 2021

• RE Diary Tags: enc
• Water Color Tags: apk
• Dive in to Numbers Tags: maths

3kCTF-2021

• Crackme Tags: VM
• Layers Tags: LLVM Obfuscation
• Microscopic Revenge Tags: nanomites , windows

Pwn2Win CTF 2021

• The Return of Too Slow Tags: optimize me , DOS

Zh3r0 CTF V2

• Sabloom Text 6 Tags: app registration
• OptimiseMe Tags: VM , optimize me
• Pyaz Tags: VM , ecnrypted layers

Others

• TUMCTF 2017
• Pico CTF 2021