# SEC-T CTF ## Bad AES - Crypto \[100 pts] \[Not Solved] > Acid Burn found this AES-CBC encrypted text in the garbage file that Joey stole from the Gibson. Sadly, Joey didn't get the full S-BOX used by The Plague. Can you help them recover the text? {% file src="" %} BadAES {% endfile %} ## Qproximity- Crypto \[200 pts] \[Not Solved] > n = 2462649746477364143454082050368305440553491900304388646893610847386194301369924385009730987303651345060031438478297733694036327257723431468649220444397635127530301992505638291521092898714917678389314956983918603221732358628680256253537449204312287724750669208856634711056863315465220853759428826555838536733 \ > e = 201527 Solution Here ## Joeys Screenshot - Misc \[50 pts] > Joey gave me this screenshot to prove he got into The Gibson. Can you help us hack The Gibson too? {% file src="" %} screenshot {% endfile %} Starting out we use `binwalk -e chall.png` and find that there are a lot of files. They are named with just some letters and looking through them there was a pattern. Noticed there is a letter followed by a number. I wrote some code to rearrange it and put it into an empty array. ```python import os files = os.listdir(".") print(files) cx = [] # Character Array for i in range(0, 50): cx.append("-") for filename in files: if "." not in filename: print(filename) f = open(filename) fs = f.readline() print(len(fs)) let = fs[0] # Letter place = int(fs[1:]) # Place cx[place] = let ans = "" for xx in cx: ans += xx print(ans) ``` Flag: SECT{D4\_K3Y\_2\_D4\_G1B50N\_5UP3RU53R\_15\_G0D\_H3H3!} ## Acid Burn - Misc \[200 pts] \[Not Solved] > I suspect Acid Burn is hiding something in her background image, but I can't quite figure out what is it. Can you help me?\ > Author: SecureLink / klondike {% file src="" %} Acid\_burn {% endfile %} 77 teams solved ## Report - Misc \[200 pts] \[Not Solved] > Mr. Belford sucks, is he hiding something....\ > Author: d3vnu11 {% file src="" %} Report {% endfile %} 48 teams solved