=== Solution ===
The file 7139a4ea239dcac655f7c38ca6a77b61.bin is a regular pcap file which contains a single TCP session.
== #2 AL's Revenge ==
* file 49dd327824d5afe9cdf931ea4b13719f.bin says xz compressed file -> xzcat > f
* file f says LLVM bitcode -> llvm-dis > f.s (only works with LLVM 2.8, not with 3.0)
* analyze disassembly, extract C representation:
== #3 Hackquest ==
* Remote system running some sort of text adventure.