Ghost in the Shellcode 2014 Write-up Collection

We had a great time solving a few problems from the Ghost in the Shellcode CTF this past weekend and wanted to have an easy place with links to write-ups from all around the Internet, so we created it here.  If you know of a link we have missed, please let...

Ghost in the Shellcode 2014 Write-up, Crypto 75: "dogecrypt"

We are given the hint “Solveable in <5m. Much attack very wamerican-small.” The file begins with “VimCrypt~01!” and research on vim’s encryption method reveals that this means the file has been encrypted with the Unix crypt function....

Ghost in the Shellcode 2014 Write-up, Trivia 150: "inview"

Viewing the file with whitespace visible in vim shows that there are strange combinations of tabs and spaces at the end of each line. Assuming there’s more to whitespace than meets the eye, we search for all non-whitespace characters: …and remove them. We...

CSAW CTF 2013 Qualification Round: Reversing

Each year, the Information Systems and Security Laboratory (ISIS Lab) of the Polytechnic Institute of New York University hosts a Cyber Security Awareness Week, bringing together students and researchers to discuss the latest in cybersecurity.  Cybersecurity...

CSAW CTF 2013 Qualifiers: Crypto 300 Write-up

The CSAW CTF 2013 online qualifiers were held last weekend (09/19/2013 through 09/22/2013). The top 10 undergraduate teams will participate in the CSAW CTF finals in November; however the qualifiers were open to everyone and a small team from Digital Operatives...