Flatpack-522.rar < LATEST • Method >

The goal of the challenge is to retrieve the hidden flag that the creator has concealed inside the RAR file. The write‑up is organized into the typical CTF sections: , exploitation / analysis , extraction , and flag retrieval . 1. Overview & Goal | Item | Description | |------|-------------| | Challenge name | FlatPack‑522 | | File | flatpack-522.rar (≈ 2 MiB) | | Category | Forensics / Reverse Engineering | | Typical points | 200‑300 (depends on the event) | | Goal | Extract the hidden flag (format: HTB... or FLAG... ) from the archive. |

$ binwalk -e mystery.bin This creates a folder _mystery.bin.extracted containing 00000000.png . Open it: flatpack-522.rar

The archive is deliberately obfuscated: it contains a password‑protected inner RAR, a steganographically‑hidden image, and a small custom‑packed executable that must be run in a controlled environment. $ file flatpack-522.rar flatpack-522.rar: RAR archive data, version 5, created Tue Sep 5 13:42:10 2023, encrypted The goal of the challenge is to retrieve

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