Sharing writeups of CTF challenges and Machines
Description The factory is hiding things from all of its users. Can you login as Joe and find what they’ve been looking at? https://jupiter.challenges.picoctf.org/problem/44573/ (link) or http://jupiter.challenges.picoctf.org:44573 Solution Go to the link, we see a login page. I read the source code but there were no useful information. I just cliked every buttons and I noticed we … Read More “picoCTF2019 – logon” »
Description I’ve hidden a flag in this file. Can you find it? Forensics is fun.pptm Solution Let’s see what is hidden in the ppt file. OK, There are quite many files hidden. Let’s extract them. Then we get the directory called _Forensics is fun.pptm.extracted Let’s see what’s inside. Found the file hidden! What’s written inside … Read More “picoCTF2021 – MacroHard WeakEdge write up” »
Description Kishor Balan tipped us off that the following code may need inspection: https://jupiter.challenges.picoctf.org/problem/9670/ (link) or http://jupiter.challenges.picoctf.org:9670 Solution Let’s check the webpage. There is the first part of the flag in page source view. The second part is hidden in the link at mycss.css And the last piece of the flag is in the myjs.js … Read More “picoCTF2019 – Insp3ct0r write up” »
Description Files can always be changed in a secret way. Can you find the flag? cat.jpg Solution Check out the details of the attached image file. exiftool can be used. Then, we get the result as below. License looks like base 64 encoded. Let’s decode it. picoCTF{the_m3tadata_1s_modified}
Description crackme.py Solution Check the source code of the python file. We can see there are two functions decode_secret() and choose_greatest(). At the end of the file, choose_greatest function is called. But, we don’t need this function. So let’s delete it. Instead, we want to use decode function. Also, we are given with the encoded … Read More “picoCTF2021 – crackme-py write up” »
I share how I solved They Are Coming CTF challenge. When I access to the web page, there was a robot pic. Also, I noticed that the question continuously mentions robots. So I checked the robots.txt file first. and Yes, there was something on the text file. The decryption key is given which means the … Read More “Vishwa CTF’24 They Are Coming write up” »
