AMOS

Inspired by real-world obfuscation techniques used in the AMOS Stealer malware, this challenge hides a flag using a transformation cipher.

You are provided with a compiled Linux binary that prompts for a decryption key. Analyze the binary to understand the algorithm and find the correct key to reveal the flag.

Binary Information:

Filename: amos
Size:     14,680 bytes (15 KB)
MD5:      c3ebc34c4b249eefdf70b7413782e927
SHA1:     b32b7ba4595ffe133a6ba8d83d77d0fa6e64badf
SHA256:   1a6e42f4f8df4b1e1b5f2d10b5a4ececc8dbfb844869bccbcb37d58e2523843c

Verify integrity after download:

md5sum amos
sha1sum amos
sha256sum amos