CTF-NYP-DEC-2023

A collection of writeups for NYP InfoSec (SIG)'s CTF organised in Dec 2023.

Completed 3rd position for Year 2 category, and 5th position of 48 competitors overall.

Frozen Scoreboard: Scoreboard Screenshot
Completed Challenges: Challenges Screenshot

Previous CTF Participated

If you're interested in the 2022 NYP InfoSec (SIG)'s May CTF writeup, you can find it here: https://github.com/taronaeo/CTF-NYP-MAY-2022

Socials

• Discord: @theglobalrussian
• LinkedIn: in/taronaeo

Tools Used

• zsteg
• stegsolve
• flask-unsign
• html2text (sudo apt install html2text)

Table Of Challenges

Category	Challenge	Status	Flag	Writeup	Files
Warmup	Warmup	Solved	NYP{read_the_rules}	(No Writeup Required)
Web	Poro!	Solved	NYP{h1diNG_IN_p@g3_!N5pe(T}	(Lim Xuan Kai's writeup)
Web	Games or No Games But Unlimited Games	Solved	NYP{Fl4$K_$ST1_1nj3ct10n@1B2C3}	(Here)
Web	Requesting Guidebook	Solved	NYP{1n53cURE_AP1_H4Ck1nG_4_r00k1es}	(Here)
Web	Ouch	Solved	NYP{oUcH_tH3_1nj3c71on_w@s_p@infu1}	(Here)
Web	Where you from?	Solved	NYP{3z_r3fer3r}	(Here)
Web	Genshin Code	Unsolved	NYP{fL@sK_s3ss1On_m@N1pulAT10N}	(Here)
OSINT	What am I	Solved	NYP{SPILOPELIA_CHINENSIS}	(Here)	(image.jpeg)
OSINT	Find me	Solved	NYP{544886}	(Here)	(image.jpg)
OSINT	Glitched and Lost	Solved	NYP{Vallejo_Steps}	(Link to Joshua) (Lim Xuan Kai's writeup)	(glitched.png)
OSINT	Where am I	Solved	NYP{Y0u-f0unD-m3!}	(Here)
OSINT	Boss Encounter-The Robot In The Mirror	Solved	NYP{L1kE&sUb5cr1Be}	(Here) (Lim Xuan Kai's writeup)
OSINT	LITTLE BUSTERS	Unsolved		(Looking for writeup)
Forensics	Advertisment	Solved	NYP{streams_@re_aL7ern@t1ng}	(Here)	(flag.wim)
Forensics	Shucks	Solved	NYP{packe7_dE7ec7ive}	(Here)	(shucks.pcapng)
Forensics	Weeb	Solved	NYP{domain_expansion}	(Here)	(bruh_moment.png)
Forensics	Running Man	Solved	NYP{1nF053c!?}	(Here)	(running-man.png)
Forensics	One too many	Solved	NYP{th3_0n3_oF_m4ny}	(Here)	(challenge.zip)
Forensics	Bruh	Solved	NYP{cyB3r_f0r3nS1c$_&&&_t3chNoloG1es}	(Here)	(something_is_wrong.webp)
Forensics	A Little Help	Solved	(TBF)	(WIP)	(johns_drive.zip)
Forensics	Poor Management	Solved	NYP{u5e_str0nk_p@5sw0rDs}	(Here)	(File too big)
Forensics	Boss Encounter-The Cartridge King	Unsolved		(Lim Xuan Kai's writeup)	(Quest_For_The_Flag.png)
Forensics	The Bridge (Faulty Challenge)	Unsolved			(bridge.png)
Forensics	The Guardian	Unsolved		(Looking for writeup)	(history.pcapng)
Reverse	RE Adventure 1	Solved	NYP{RE_4dven7uRE_7h3_b4siCs}	(Here)	(chall)
Reverse	Flag Guesser	Solved	NYP{b1n4ry_C_FL4g_GU35S1ng}	(Here)	(flag_guesser)
Reverse	esreveR	Unsolved		(WIP)	(ouroboros.bin) (output.txt)
Reverse	RE Adventure 2	Unsolved		(WIP)	(chall)
Crypto	Ancient Waves	Solved	NYP{nUmb3rs_4_daY5}	(WIP)	(Ancient_Waves.jpg)
Crypto	Decrypting the Gamer's Code!	Solved	NYP{GANONDORF}	(WIP)	(my-favourite-game-franchise.7z) (clues.png)
Crypto	Which map did bro play on?	Solved	NYP{G0Od_JoB_l!l_br@}	(WIP)	(which_map_did_bro_play_on.py)
Crypto	Forbidden Language	Solved	(TBF)	(WIP)	(code.txt)
Crypto	Empty File	Solved	NYP{ 1 T i 5 n T 3 M p 7 Y ! ! ? }	(WIP)	(flag.txt)
Crypto	I'm Xorry	Solved	NYP{p1aintX+a@attackk}	(Lim Xuan Kai's writeup)	(xorry.py)
Crypto	Caesar is fun	Unsolved		(Lim Xuan Kai's writeup)	(chall.py) (encrypted.txt)
Crypto	Spot me	Unsolved		(Looking for writeup)	(text.txt)
Misc	ASCII Arts	Unsolved		(Looking for writeup)	(scuffedascii.txt)
Misc	Boss Encounter - The Quiz Master	Unsolved		(WIP)
Misc	Uncalibrated Algorithm	Unsolved		(Looking for writeup)	(Uncalibrated_algorithm.py)
Misc	Netception	Unsolved		(WIP)	(ctf_challenge.pka)
Physical	Physical Challenge - Slay the Dragron	Solved	NYP{DR4G0N_5L@IN3D!}	(WIP)