CTF challenges & writeups

241 challenges in family ⊕ misc ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
Waguri2 #brainfuck-esolang	LYKNCTF 2026	–	Reverse	files wu 1
HEuristic #ckks #microsoft-seal #approximate-common-divisor #lattice	R3CTF 2026	35.95	Misc	files wu 1
Tsukis_Rhythm_Game #pyinstaller #aes-cbc #marshal-bytecode #malware-c2	R3CTF 2026	35.95	Misc	files wu 1
mafuyuuuuu #xoshiro256 #prng-state-recovery #dotnet-random	R3CTF 2026	35.95	Misc	files wu 1
trustedhash #tpm2 #remote-attestation #sealed-object #pcr	R3CTF 2026	35.95	Misc	files wu 1
Buried_Treasure #multi-stage-unpacking #memfd-create #xor #strace-dump	RITSEC 2026	–	Reverse	files wu 1
impossibler_pygolf #micropython #code-golf #grep-mbedtls-test-vector	RITSEC 2026	–	Misc	files wu 1
F_K #brainfuck #timing-side-channel	ScriptCTF 2026	–	Reverse	files wu 1
SekaiID #android #ipc-abuse #claims-forgery	SekaiCTF 2026	79.25	Misc	files wu 1
Beaconing_from_above #sdr #signal-analysis #morse	Starpwn 2026	–	Misc	files wu 1
Silent_Beacon #ccsds #covert-channel	Starpwn 2026	–	Misc	files wu 1
quant #quantum-computing #grovers-algorithm	UMDCTF 2026	–	Misc	files wu 1
GISSNINGSLEK #bash-injection	Hack.lu 2025	98.02	Misc	files wu 1
Invaders #godot-game-reversing	N0PSctf 2025	24.34	Pwn	files wu 1
Learning_OOP #heap-overflow #vtable #safe-linking-bypass	SekaiCTF 2025	55.00	Pwn	files wu 1
BigMak #keyboard-layout-mapping	SunshineCTF 2025	51.65	Misc	files wu 1
Tribble_with_my_Skin #steganography #png	SunshineCTF 2025	51.65	Misc	files wu 1
verified_toolbox #cve-2024-38807 #jar-signature-forgery	TPCTF 2025	–	Misc	files wu 1
ai_clippy #mcp-exploitation #prompt-injection	UIUCTF 2025	–	Misc	files wu 1
Odd_One_Out #qr-code	UMassCTF 2025	48.38	Misc	files wu 1
dont_whisper #adversarial-audio	bi0sCTF 2025	95.79	Misc	files wu 1
whatever_floats_your_boat #vm-reversing #floating-point #mxcsr	corCTF 2025	82.00	Reverse	files wu 1
Layers #file-concatenation #binary-to-ascii-decoding	1337UP 2024	–	Misc	files wu 1
Quick_Recovery #qr-code-reconstruction #brute-force-permutation	1337UP 2024	–	Misc	files wu 1
My_Brain_Hurts #brainfuck	BCACTF 2024	–	Reverse	files wu 1
Decompressor #huffman-coding #compression-reconstruction	BackdoorCTF 2024	–	Misc	files wu 1
Melek #shamir-secret-sharing #lagrange-interpolation #non-coprime-exponent #modular-square-root	Crypto 2024	65.62	Misc	files wu 1
gpwaf #web #prompt-injection #ejs-ssti #rce	DiceCTF 2024 Quals	54.40	Web	files wu 1
zshfuck #misc #jail #zsh #restricted-charset	DiceCTF 2024 Quals	54.40	Misc	files wu 1
What_the_Beep #audio-triangulation	IrisCTF 2024	24.59	Forensics	files wu 1
shattered_memories #constraint-reconstruction	LA 2024	–	Reverse	files wu 3
Thats_Not_My_Base #base92-decoding	NahamCon 2024	41.61	Misc	files wu 1
Uriel #double-url-decode	NahamCon 2024	41.61	Misc	files wu 1
DHCPPP #chacha20-poly1305 #nonce-reuse #tag-forgery	PlaidCTF 2024	95.19	Misc	files wu 1
Hijacker #android #overlay-attack #tapjacking	SekaiCTF 2024	36.96	Misc	files wu 1
Miku_vs._Machine #ppc #scheduling-algorithm	SekaiCTF 2024	36.96	Misc	files wu 1
Stegharmed_Part_1 #steganography #audio	THCon 2024	–	Stego	files wu 1
Astea #python-jail-escape #ast	UIUCTF 2024	–	Misc	files wu 1
Agent_P #keyboard-cipher	UMassCTF 2024	43.10	Misc	files wu 1
Magic_The_Ungathering #image-analysis	UMassCTF 2024	43.10	Misc	files wu 1

Challenges