Steganography

Posts tagged "Steganography"

2 posts found

4 min read

TJCTF 2026 — loud-packets Writeup

A pcap posing as a Bluetooth file transfer actually carries a WAV file split across 459 UDP packets. The audio is not a protocol — it is a Hellschreiber bitmap, and the spectrogram is the decoder.

#CTF#Cybersecurity#Forensics

3 min read

TraceBash 2026 — The Silent Echo Writeup

A tiny capture that looks like DNS noise, a decoy ICMP flood and a fake SSH session. The real message is smuggled in two header fields nobody reads: the IP identification field of ICMP echoes and the TCP window size of an HTTP flow.

#CTF#Cybersecurity#Forensics

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Cybersecurity31CTF23Web12Network8API Security7Forensics7IDOR6Penetration Testing5Linux5OSCP4PEN-2004XSS4Reverse Engineering4Defense4Authorization4GoCat3Networking3Mobile Security3Access Control3Testing3