Resethacker CTF 2020 - dumpster diving 1
Aug 29, 2020
Challenge Description
Restcon users are solving a CTF Challenge and got fed up too soon can you solve it -
firefox.zip
Solution
Great, look like we have some firefox profiles to inspect, leets dump the content with dumpzilla
dumpzilla x2p79maw.default-esr/ --History
we see some web requests beying sent to cyberchef engine
https://gchq.github.io/CyberChef/#recipe=ROT13(true,true,11)To_Hex('Space',0)&input=ZDc1Mzc1MzQ2NGY1MzNmNDEzNTM5NTEzZjU5NTMzZjRmNDEzMzVmNTI1NDM3NTE1Yjc5NWE1ZTQ1NDQ0MDUzNA
and it seems like the user was trying to decode that cypher
d753753464f533f413539513f59533f4f41335f525437515b795a5e454
we can give it a try on cyberchef :)
- From Hex :
×Su4dõ3ô.S..õ.3ôô.5õ%Cu.·.¥äT - Rotat Right :
}5WCF_3O15Y1_Y3OO1S_R4WQ{YZNE - Reverse it :
ENZY{QW4R_S1OO3Y_1Y51O3_FCW5} - Rot13(-11) :
TCON{FL4G_H1DD3N_1N51D3_URL5} - Final Flag :
RESTCON{FL4G_H1DD3N_1N51D3_URL5}
m3dsec