Defcon 2015 Quals - mathwhiz solution

Category: Baby's First Points: 1

The information given to us:

mathwhiz_c951d46fed68687ad93a84e702800b7a.quals.shallweplayaga.me:21249

After connecting to it we can see it's giving us mathematical operations and he's waiting for the result. The solution is pretty easy. Get the data and pass it to python eval and return the result to the server.

Defcon 2015 Quals - Babyecho Writeup

This write-up is made by boogy of the on_est_pas_contents ctf team

This was an cool challenge which was worth 1 point. But nevertheless we enjoyed solving it. The binary is 32bit and striped:

Ghost in the Shellcode 2015: Cloudfs writeup

Category: Forensics Points: 200

The file we were given if a pcapng file. To be able to read'it with scapy we need to convert it to pcap. The easiest way is to use tcpdump as so:

tcpdump -r cloudfs-31c938df3531611b82fddf0685784a2b67373305ec689015f193a555b756beb2 -w cloudfs.pcap

Use scapy to extract all icmp packets:

31c3ctf devilish writeup

This is my first ctf writeup so I hope it won't be to horrible. And sorry in advance for my bad English.
I'll talk about devilish a web challenge from the 31c3ctf 2014 CTF. I'll give credit to one of our team members on this one "Michael", because we were both working on this challenge.

Well lets get to business with the devilish 30 points challenge. 24 teams solved it.
Here is the description of the challenge:

It's some devilish community public portal, we're pretty sure there's something else out there, a private portal maby, we'd like to know the secret behind it