Pragyan CTF 2020 Writup

Name-Up_can_be_Down

Category-Forensics

Points-100

Description=Mr. Robot is being sent to future. But accidently he lost his passkey which he needs to activate the Time Machine. But he is smart and had already asked Elliot to save the key inside a file to use it in such conditions but safely so that others can’t retrieve it easily. Can you help Mr. Robot to find the secret passkey from the file?

Solution

So we are provided with a file called mrRobot.txt

Running exif tool on the image gives us

we can see that there is a base 64 string in Format value:U29tZSBTSEEgbWF5YmUhISEh

Decoding it gives us the hint to crack the hash trying the hash on https://crackstation.net/

now trying the key avium as passphrase to steghide

so the flag is

p_ctf{s0rry_6ut_1_@m_n0t_@_r060t}