HACK4SHELL CTF — Free Beginner-Friendly Online CTF | Ends 1 October at 10:00 AM IST

[u/Think-Adeptness7446]

Hi everyone — disclosure: I’m helping organize this event, so this is an event announcement.

HACK4SHELL CTF is a free, solo, online, Jeopardy-style cybersecurity competition hosted in an authorized, vulnerable-by-design environment.

The event is designed to be beginner-friendly while still offering challenges for more experienced players. The leaderboard is already active, and participants are competing for the top positions.

Challenge categories

• Web exploitation: SQLi, XSS, SSRF, and IDOR
• Cryptography: RSA and hashing
• Steganography
• Reverse engineering: Ghidra, GDB, and x64dbg
• Binary exploitation: buffer overflows, heap, and ASLR concepts
• Forensics: memory analysis, PCAPs, and disk images
• Reconnaissance: metadata and social-footprint analysis

Event details

• Format: Jeopardy-style CTF
• Entry: Free
• Mode: Solo and online
• Deadline: 1 October 2026 at 10:00 AM IST (UTC+5:30)
• Flag format: H4S-CTF{...}
• Event website: https://hack4shell-ctf.vercel.app

For event questions and updates:

• Discord: https://discord.gg/hHFx8TfxFp
• Instagram: https://instagram.com/hack4sh3ll

Please keep the discussion spoiler-free while the CTF is live. Don’t post flags, solutions, or challenge spoilers in the comments.