The flag is typically found by or performing LSB steganography on the images found inside.
If the file was extracted on a Windows system, check for hidden streams using dir /R . Conclusion bmwm4custom.rar
Inspect metadata for comments or GPS coordinates that might serve as a flag or password. The flag is typically found by or performing
Running file bmwm4custom.rar identifies it as a RAR archive . Running file bmwm4custom
If the archive is password-protected, the first step is checking for "RockYou" or challenge-specific hints. Tools like John the Ripper or hashcat are used to crack the password: Extract the hash: rar2john bmwm4custom.rar > hash.txt
If the extracted files (like images of a BMW M4) appear normal, the flag is likely hidden using steganographic techniques.
In some variations of this challenge, the "rar" extension is a mask: