HSCTF_2017:

Category: Reversal Points: 100 Description:

Too many hashes. Help Keith get to the flag!

Write-up

Just b64decode it to hex encoding, get the md5 hash and run it against hashkiller.

$ ./solve.py 
MD5 of Flag: 4f79807a7c47f697bd5f06beef955cfd
SHA1 of Flag: f4fdaef8ade8edf707858fe4294d780d69d4d6a8
Flag: TlZMN09

Therefore, the flag is TlZMN09.