Sharing writeups of CTF challenges and Machines
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” »