[Write-up] CSAW CTF 2015 - Crypto notesy 100

notesy

100

269 solves

http://52.7.208.12/

The flag is not in the flag{} format.

I'm happy when I didn't spend too much time with this challenge. Poor you :v
We were given a link. Try some inputs and I can see it's just a substitute cipher.
And google for an alphabet english:
https://en.wikipedia.org/wiki/English_alphabet
(because I'm very lazy to fill in the input form).
ABCDEFGHIJKLMNOPQRSTUVWXYZ

UNHMAQWZIDYPRCJKBGVSLOETXF

Booom! Can't believe this is our flag :D

--- matnacian ---

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[Write-up] MMA CTF 2015 - MQAAAA 70

Problem

I0B+Xk1RQUFBQT09CVVtLmJ3RFIrMXRLY0p0SCkJRHRubTZWbFRtaEtETnxyZHtLNDZFZG1DT2JXVThyYmpSSUFBQT09XiN+QA==

It's easy to see that's base64 encoded. Decode this string:
#@~^MQAAAA== Um.bwDR+1tKcJtH) Dtnm6VlTmhKDN|rd{K46EdmCObWU8rbjRIAAA==^#~@

"MQAAAA"! Yes, we are on the right way.
Just google "MQAAAA" and you can find this link: 
LANGUAGE = VBScript.Encode %> <%#@~^CgAAAA==[b ...
www.rzc.com.cn/images/images.asp

OK, VBScript.Encode. Decode this with: http://ayra.ch/service/vbs/vbs.asp
Got it, MMA{the_flag_word_is_obfuscation}

--- matnacian ---

--- ctf for beginners ---

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