Super AES
A challenge from GCC CTF
Description
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RSA Destroyer
A challenge from FCSC
Challenge description : This destroyes the RSA cryptosystem. Resolution : So, we have two files which are : output.txt e = 65538 n = 444874973852804286630293120525019547982392964519934608680681255396764239795499482860997657663742247333836933457910503642061679607999128792657151145831533603267962151902191791568052924623477918783346790554917615006885807262798511378178431356140169891510484103567017335784087168191133679976921108092647227149255338118895695993606854195408940572577899625236666854544581041490770396755583819878794842828965377818593455075306655077757834318066860484956428681524881285058664687568640627516452658874124048546780999256640377399347893644988620246748059490751348919880389771785423781356133657866769589669296191804649195706447605778549172906037483 c = 95237912740655706597869523108017194269174342313145809624317482236690453533195825723998662803480781411928531102859302761153780930600026069381338457909962825300269319811329312349030179047249481841770850760719178786027583177746485281874469568361239865139247368477628439074063199551773499058148848583822114902905937101832069433266700866684389484684637264625534353716652481372979896491011990121581654120224008271898183948045975282945190669287662303053695007661315593832681112603350797162485915921143973984584370685793424167878687293688079969123983391456553965822470300435648090790538426859154898556069348437896975230111242040448169800372469 rsa_destroyer.py ```python from Crypto.Util.number import isPrime, bytes_to_long from Crypto.Random.random import getrandbits [Read More] -
Malware 1/3
A challenge from FCSC
Resolution : First of all, we have a file ”snapshot.sav” wich is a memory dump. We know that this file contains a program which can encrypt ”/home/%USER%/Desktop/flag.txt”. That means it’s a linux memory dump. We need to find the username, the hostname and the command line which encrypts the flag.... [Read More]