Expertise gained during Capture The Flag competitions to support the security research community
Link: https://wargame.whitehat.vn/Challenges/DetailContest/143 Points: 100 Category: RE Description http://material.wargame.whitehat.vn/contests/11/digital_fortrees.exe flag = SHA1(FirstRoom:SecondRoom:ThridRoom) tl;dr Simple python program packed with py2exe. After recovering python code back from it, turns out all you need to do is factorize 28-digit number made of 3 primes. Solution…
Link: https://wargame.whitehat.vn/Challenges/DetailContest/141 Points: 100 Category: RE Description http://material.wargame.whitehat.vn/contests/11/re1_d3309936b177b41dada3796c4c3acadf.zip tl;dr see below Solving the task When executed the program asks for input. It seems that regardless of what is being provided the answer is always “wrong“. Simplified reversed C code for…
Points: 100 Categories: forensic, network Task description “Mysterious traffic”, or in other words, we have a dump of network traffic and we’re asked to analyze what it says. Provided is a pcapng file with the dump of the traffic. tl;dr…
Link: https://backdoor.sdslabs.co/challenges/DTUNE Author: Vishrut Kumar Mishra Points: 70 Category: forensic, sound Description Vector recorded this audio when Gill Bates was opening his/her vault and Gru stole this recording from him (stealing from a thief ain’t a crime, right?). Help Gru…
Link: https://backdoor.sdslabs.co/challenges/CRC Author: IamLupo Points: 250 Category: crypto Description Backdoor user IamLupo wanted to submit his challenge for BackdoorCTF16 but he was struck by lightening and his challenge file shattered into 26 pieces. We want you to recover it for…
Link: https://backdoor.sdslabs.co/challenges/WORST-PWN-EVER Author: Ashish Chaudhary Points: 100 Category: pwn, Python Description tocttou is an enviornmentalist. But some say he has a vicious motive and he uses nature to hide his dark side. We found a weird shell on his amazon…
Link: https://backdoor.sdslabs.co/challenges/LOSSLESS Author: Arpit Singla Points: 100 Category: stegano Description d4rth used his dirty methods to hide a secret in a png file. He is cleverly trying to divert your focus from challenge, but the force is strong with you.…