SunCTF
yesterday i participated in my college's internal CTF, mostly as committee while playing some challenges as a walk-in (non participatory). i designed the main logo and acted as the photographer! my friends did a really good job hosting the event, so i hope everyone who participated had fun!
i'll add some very brief writeups (if you can call it that) for some challenges
Crypto
Bot - 50
01110011 01110101 01101110 01100011 01110100 01100110 01111011 01101101 01010010 01011111 01110010 00110000 01100010 00110000 01110100 01011111 00110001 01110011 01011111 01100001 01011111 01110010 00110000 01100010 00110000 01110100 00111111 00100001 01111101
binary ->
sunctf{mR_r0b0t_1s_a_r0b0t?!}
Based - 50
73756e6374667b62617365645f6f6e5f6465657a5f6e75747a7d
hex ->
sunctf{based_on_deez_nutz}
Base64 - 100
as stated, the message is encoded in base64 multiple times, when decoded ->
sunctf{did_you_script_this?}
ROTten - 100
kmf[l^s^),_kW\(flWj(lu
this is rot47, amount = 8 in cyberchef
sunctf{f14gs_d0nt_r0t}
House Keys - 150
use the private key to decrypt ->
sunctf{d0ct0r_h0us3_l0st_h1s_k3ys}
Misc
Sit Back and Relax - 100
web server that runs on... HTPCPCP! which is an april fools joke. sending in an outdated request (there's one on stackoverflow, which i think was assumed what most people would do first)
but using the updated RFC 7168, which is actually built for tea, will yield the flag:
Forensics
Sussy Disk 5 - 500
this is a 3 part question that can be found all over the disk image! each one gives hints to the next spot, and the first part can be found by taking part of a PS script:
second part by decrypting this txt file with base64 text to get this:
taking part of it and editing it to my own locations, i get this:
third part can be found here, in this python script:
just run it:
all together:
sunctf{malware_analysis_is_not_that_hard}
OSINT
Motto - 50
find the motto of our uni:
sunctf{Fortuna Erudites Favet}
Promo OSINT - 100
from b64 ->
sunctf{baz1ng4}
furthermore there was a web one called Robots where the challenge was to go to the robots.txt and grab the flag in one of the pages but I forgot the flag...
furthermore here are some shots of my cats
