Cyclix

Inspired by real-world malware obfuscation techniques, this challenge implements a cyclic encryption routine to hide its secrets.

You are provided with a compiled Linux binary that prompts for a decryption key. The encrypted data is split into multiple parts to make static analysis more challenging. Analyze the binary to understand the encryption mechanism and recover the flag.

Binary Information:

Filename: cyclix
Size:     14,680 bytes (15 KB)
MD5:      26fe34e3745a99211f8fd268b073679f
SHA1:     4003061d4d608d6f2433ae1233eac9d568130475
SHA256:   c0bfee719986c09b5bb7ddce208fc974834e39f885f0ddf4adf95d4a90f938de

Verify integrity after download:

md5sum cyclix
sha1sum cyclix
sha256sum cyclix