Binary L33tness 300

Summary

Question

There's an answer in here somewhere.

Files

Local mirror

Summary

Always check for stupid challenges

Flag

mYg0dthi$isD@k3y

Walkthrough

We didn't solve this during the competition; teammates mostly worked on it and I didn't think of this:

$ chmod +x b300_01118fdc9c9b52aa.bin 
$ ./b300_01118fdc9c9b52aa.bin 
Encrypted key
7d343be755ff63e0a5908f625c203573
Hash for offset 0:
4a977fd18d9eada7b5a8cb9009311b77
Xor value is
37a34436d861ce47103844f255112e04
Hash for offset 17:
5afa2306bc15a62e345137b6157a1d7d
Xor value is
6d5967306474686924697344406b3379
Final decrypted key value
6d5967306474686924697344406b3379
$ echo 'print "6d5967306474686924697344406b3379".decode("hex")' | python -
mYg0dthi$isD@k3y

Sigh.