Decoding JTAG

read more# PoliCTF 2017 - Ham writeup

Discovering and decoding a hidden BPSK31 transmission

read more# Trend Micro CTF 2017 Quals - Forensic 300 writeup

Restoring ransomware-encrypted files from Cuckoo logs

read more# Trend Micro CTF 2017 Quals - Misc 400 writeup

DNS packets aren't what they seem

read more# Google CTF 2017 Quals - RSA CTF Challenge writeup

Delving into lackluster implementations of PKCS#1 v1.5

read more# ASIS CTF 2017 Quals - Crows know! writeup

This time, the task is very simple: after completing an obligatory proof of work (a basic SHA256 bruteforce) and waiting a couple seconds we are presented with a couple of pretty big integers,

`a`

and`b`

. So what's the mission?read moreYour mission is to find x, y such that x …

# Nuit du Hack XV Quals - codetalkers writeup

So this challenge was comprised of a single 15-megabyte animated gif, flashing various symbols at you one at a time for more than a thousand frames, each different color and size, positioned randomly on a black background. It seemed wise to disregard everything about them except what the actual symbol …

read more# BSIDES CTF 2017 - nibbler writeup

Alright. Alright, I'm doing this one.

So for the nibbler challenge we've got something pretty simple - a source code of basically a Snake game, with a little bit of a twist in that instead of your usual score items the snake eats literally nibbles, or 4-bit chunks of data, that …

read more# BSIDES CTF 2017 - ximage writeup

Well this was a fun one.

So what we've got here is this archive of seven BMP images: ximage.zip, and we also know from the description that every one of them should contain the same flag, starting with 'FLAG:'. Thumbing through them, we can see at a glance that …

read more# Codegate 2017 Prequals - Meow writeup

We're given a binary which won't lauch without libcrypto1.0.0.so, and when launched asks for a password. Upon examination, turns out that the password should be at most 10 characters long, with its md5 hash equal to

read more`9f46a92422658f61a80ddee78e7db914`

(that's where the OpenSSL import comes in, but the implementation …

Page 1 / 2 »