Browse challenge writeups by category. Each category covers challenges from major global CTF events — Google CTF, DEF CON, picoCTF, HackTheBox CTF, and more — organized by year.
Web Exploitation
SQLi, XSS, SSRF, SSTI, HTTP Request Smuggling, OAuth, JWT, GraphQL, Prototype Pollution
Binary Exploitation (Pwn)
Stack overflow, ROP chains, heap exploitation, format strings, ret2libc, kernel exploits
Reverse Engineering
ELF/PE analysis, anti-debugging, obfuscation bypass, firmware RE, malware analysis
Cryptography
RSA attacks, AES mode weaknesses, ECC, hash collisions, classical cipher breaking
Digital Forensics
Memory dumps, PCAP analysis, disk forensics, steganography, log analysis, DFIR
OSINT
Geolocation, social media intel, metadata analysis, domain footprinting, OSINT trails
Misc / Programming
Pyjails, bash scripting, custom protocols, regex bypasses, blockchain challenges
Active Directory
Kerberoasting, AS-REP, ACL abuse, constrained/unconstrained delegation, AD CS ESC chains
PicoCTF
Guided educational security challenges: web, cryptography, forensics, reversing, binary exploitation.
Other CTF's
Exploitation walkthoughs and writeups from various online and offline CTF events.
🏆 Major CTF Events Coverage
| Event | Type | Frequency | Top Categories |
|---|---|---|---|
| Google CTF | International | Annual (June) | Web, Pwn, Reversing, Crypto |
| DEF CON CTF Quals | International | Annual (May) | Pwn, Reversing, Binary |
| picoCTF | Educational | Annual (March) | All categories, beginner-friendly |
| HTB Cyber Apocalypse | International | Annual | Web, Pwn, Reversing, Forensics |
| HTB Business CTF | International | Annual | Web, Cloud, Reversing, Blockchain |
| CTFtime Global Events | Various | Year-round | All categories |
| CSAW CTF | Academic | Annual (Sept) | Web, Pwn, Reversing, Forensics |
| NahamCon CTF | Community | Annual | Web, OSINT, Misc, Forensics |
| PicoCTF | Educational | Annual | All, beginner-friendly |
| MetaCTF | Community | Annual | Web, Pwn, OSINT |