Dec 29, 2019#kksctf open 2019 — PostmanThe Challenge Hey, some kaсkers steal my mail. Can you help return and deliver it? The Postman challenge provides us with a remote website and port. Navigating to the site shows us only a single line of text asking us to help the user retrieve their email. The Solution Let’s help the user get…Infosec2 min readInfosec2 min read
Dec 29, 2019#kksctf open 2019 — Xmas TreeThe Challenge Do you like to decorate the Christmas tree? This challenge was listed as “Misc”, and no other hints were provided. The Solution This was an easy challenge, as the answer was literally staring participants in the face during the entire CTF. Navigating to the kksctf web page showed a variety of Christmas themes, including a neat ASCII Christmas tree.Cybersecurity2 min readCybersecurity2 min read
Dec 29, 2019#kksctf open 2019 — Stego WarmupThe Challenge We get some file. Can you find secret? We are provided the above file of Shaq gracefully obfuscating himself behind a tree. No other clues or hints are provided. The Solution This was an extremely easy steganography challenge. The flag we are looking for is embedded inside the image data. We can extract the EXIF metadata from the image using exiftool, revealing the final flag.Infosec1 min readInfosec1 min read
Dec 29, 2019#kksctf open 2019 — Red XOXOXOThe Challenge We receive a message that is captured, and since this challenge is listed as “crypto”, we need to decipher the cipher text of -*;91~.,1*1=12~;-*?<27–6;:r~+-;~=27;0*~*1~=100;=*p~7y3~)?7*709~81,~+,~,;.2'p~55-%?**j=5.?*.:j)0#Cybersecurity2 min readCybersecurity2 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019 — Challenge ZeroThis write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. Prior to the start of OverTheWire Advent Bonanza 2019, the creators released a “Challenge Zero” for teams to work on. The challenge was located at https://advent2019.overthewire.org/challenge-zero…Ctf Writeup5 min readCtf Writeup5 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019 — Sudo SudokuThis write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. The Challenge Santa’s little helpers are notoriously good at solving Sudoku puzzles. Because regular Sudoku puzzles are too trivial, they have invented a variant.Programming3 min readProgramming3 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019–Santa’s SignatureThis write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. The Challenge Can you forge Santa’s signature? The Data We are provided a remote service to connect to, as well as some source code on how that service is running.Infosec3 min readInfosec3 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019–tiny runesThis write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. The Challenge One of Santa’s Little Helpers received an unusual Christmas wish, a copy of the yet to be released Deus Hex game. All they managed to find…Ctf4 min readCtf4 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019–moooThis write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. The Challenge ‘Moo may represent an idea, but only the cow knows.’ — Mason Cooley Mooo was one of the more fun challenges and provided us with a…Hacking4 min readHacking4 min read
Dec 27, 2019OverTheWire Advent Bonanza 2019–7110This write up is part of a bigger Capture The Flag competition. You can see other challenge write ups on the main post here. The Challenge Santa is stranded on the Christmas Islands and is desperately trying to reach his trusty companion via cellphone. We’ve bugged the device with a primitive keylogger…Cybersecurity5 min readCybersecurity5 min read
