56100.rar -

: Use xxd or a hex editor to look for magic bytes (e.g., 50 4B for ZIP) if the file command fails. 5. Finding the Flag

The challenge involves a recursive "Russian Doll" style of nested archives where each layer requires a different extraction or decoding technique to proceed to the next. Challenge Write-up: "Deep" 56100.rar

: This typically yields a new file, often another archive or a file with a numerical name (e.g., dark.zip or a series of numbers). 2. Identifying File Types : Use xxd or a hex editor to look for magic bytes (e

: Usually, the password for the current layer is the name of the file itself or a string found inside a .txt file within the previous layer. Challenge Write-up: "Deep" : This typically yields a

: If the file is p@ssword.zip , the password is often p@ssword . 4. Decoding and Hex Analysis Some layers may not be archives but encoded text files.

: Because this challenge is repetitive, many participants use a bash script or Python script to loop the file identification and extraction commands until the flag is reached.

The goal is to navigate through multiple layers of compression and encoding to find the hidden flag. 1. Initial Extraction The file 56100.rar is a standard RAR archive. : Extract the file using unrar x 56100.rar .