Cyber Santa is Coming to Town 2021
A 5-day long CTF, with a challenge of every category coming out every day. Challenges range from beginner to medium.
CryptoScripting +325 points
Forge your own SHA512 signature using a length extension attack to execute signed SQL queries and get the flag.
Meet me halfway
Double AES ECB encryption. Use a cryptographic trick to brute force 2 keys separately and decrypt the flag.
ForensicsMiscellaneous +300 points
A memory dump that needs to be analyzed to find traces of a malware attack
CryptoReversing +325 points
A packet capture file with encrypted data, and reverse the assembly instructions to decrypt the data