transposition-trial Description Our data got corrupted on the way here. Luckily, nothing got replaced, but every block of 3 got scrambled around! The first word seems to be three letters long, maybe you can use that to recover the rest of the message. Download the corrupted message here. Solving Looking into the encrypted message we can see, that the first
rail-fence Description A type of transposition cipher is the rail fence cipher, which is described here. Here is one such cipher encrypted using the rail fence with 4 rails. Can you decrypt it? Download the message here. Put the decoded message in the picoCTF flag format, picoCTF{decoded_message}. Solving So – there is everything we need to know in the challenge
diffie-hellman Description Alice and Bob wanted to exchange information secretly. The two of them agreed to use the Diffie-Hellman key exchange algorithm, using p = 13 and g = 5. They both chose numbers secretly where Alice chose 7 and Bob chose 3. Then, Alice sent Bob some encoded text (with both letters and digits) using the generated key as
credstuff Description We found a leak of a blackmarket website’s login credentials. Can you find the password of the user cultiris and successfully decrypt it? Download the leak here. The first user in usernames.txt corresponds to the first password in passwords.txt. The second user corresponds to the second password, and so on. Solving We got a tar file – extract
AAAAA AAAAA. That’s all Download AAAAA Okay – first of all, like always I run file on this AAAAA file. This will tell us, that this is a data file. After that, I tried binwalk. BÄM There is an image included. My colleague uses CyberChef for this. There you can import the file and run Extract files on. I just
Deep Bielsa: ‚A man with new ideas is a madman, until his ideas triumph‘ Given is this foto: Todos Okay guys – this one is an easy one, but I did not solved that by my own! My personal rabbitholes Disclaimer: I couldn’t solve the challenge and had to bang my head on the edge of the table for hours
Noise Messi: ‚When the year starts, the objective is to win with all the team, personal records are secondary‘ Todos Given was this picture: In this stego challenges the first approach is to check the file type and look for some strings. $ ~ # file challenge.png challenge.png: PNG image data, 926 x 1262, 8-bit grayscale, non-interlaced That looks normal…
BSides-Jeddah-CTF Writeups to the BSides Jeddah CTF – 2021 Situation – BSides Jeddah BSides Jeddah is coming up with a blueteam flavored CTF this year hosted by CyberDefenders. This will be a Jeopardy-style intermediate CTF with a few harder challenges, including network analysis, memory forensics, and malicious document analysis. To get latest updates, follow us on twitter @JeddahBsides , @CyberDefenders.
BSides-Jeddah-CTF Writeup to the BSides Jeddah CTF – 2021 Situation – BSides Jeddah BSides Jeddah is coming up with a blueteam flavored CTF this year hosted by CyberDefenders. This will be a Jeopardy-style intermediate CTF with a few harder challenges, including network analysis, memory forensics and malicious document analysis. To get the latest updates, follow us on twitter @JeddahBsides ,
Poor MEGAN! Points 20 Description Oh, NO! Poor Megan! She’s just been bitten by a ZOMBIE! We can save her if we act fast, but the formula for the antidote has been scrambled somehow. Figure out how to unscramble the formula to save Megan from certain zombification. Enter the answer as flag{here-is-the-answer}. The formula for the antidote: j2rXjx9dkhW9eLKsnMR9cLDVjh/9dwz1QfGXm+b9=wKslL1Zpb45 Getting the