Rating: 5.0

We got a pcap, the problem was obvious from the challenge name
(heartbleed). Given the RSA-2048 pubkey we sought for prime numbers of
around 1024 bits in the pcaps, then reconstructed the private key and
used it to decrypt the encrypted part of the session, which contained
the flag.

Original writeup (https://duksctf.github.io/Inso2016-pcapbleeding/).