CTF challenges & writeups

21438 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
You_Scanned_WHAT #sinogram-reconstruction	L3akCTF 2026	34.47	Forensics	files wu 2
po1337nomial_revenge #mersenne-twister-untemper	L3akCTF 2026	34.47	Crypto	files wu 1
Control_Freak_1 #custom-cipher-reversing	LYKNCTF 2026	–	Reverse	files wu 1
Control_Freak_2 #splitmix64-prng	LYKNCTF 2026	–	Reverse	files wu 1
Ez_Pwn #signed-integer-overflow	LYKNCTF 2026	–	Pwn	files wu 1
FU_Career #sql-injection-into-outfile	LYKNCTF 2026	–	Web	files wu 1
Follow_The_Layer #blockchain-transaction-tracing	LYKNCTF 2026	–	Forensics	files wu 1
H34P_D3V1L #tcache-poisoning	LYKNCTF 2026	–	Pwn	files wu 1
I_HATE_THIS_APP #static-string-analysis	LYKNCTF 2026	–	Reverse	files wu 1
I_HATE_THIS_APP_REVENGE #aes-ctr-fixed-key	LYKNCTF 2026	–	Reverse	files wu 1
Return_to_Lose #ret2win	LYKNCTF 2026	–	Pwn	files wu 1
Waguri2 #brainfuck-esolang	LYKNCTF 2026	–	Reverse	files wu 1
World_Cup_1 #lsb-steganography	LYKNCTF 2026	–	Forensics	files wu 1
World_Cup_2 #polyglot-appended-zip	LYKNCTF 2026	–	Forensics	files wu 1
RepusPing #ptr-guard-key-recovery	MntcrlCTF 2026	25.00	Pwn	files wu 1
Blinky #pointer-authentication #speculative-execution #cache-side-channel #mips	R3CTF 2026	35.95	Misc	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
r3ticket #lagrange-interpolation #negative-index #linear-algebra	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
T_reasure_Chest #xtea	RITSEC 2026	–	Reverse	files wu 1
doMonkeysSwim #static-rop #stack-buffer-overflow #stack-pivot #syscall	RITSEC 2026	–	Pwn	files wu 1
impossibler_pygolf #micropython #code-golf #grep-mbedtls-test-vector	RITSEC 2026	–	Misc	files wu 1
not_quite_optimal #gmp #tetration #power-tower	RITSEC 2026	–	Reverse	files wu 1
obfpyscated #python-obfuscation #xor #aes	RITSEC 2026	–	Reverse	files wu 1
F_K #brainfuck #timing-side-channel	ScriptCTF 2026	–	Reverse	files wu 1
Misdirection #bacon-cipher #24-letter-alphabet	ScriptCTF 2026	–	Crypto	files wu 1
Open_World #blockchain #ton #shared-state-abuse	SekaiCTF 2026	79.25	Blockchain	files wu 1
PP_Farming_2 #smart-contract #storage-collision	SekaiCTF 2026	79.25	Blockchain	files wu 1
SekaiID #android #ipc-abuse #claims-forgery	SekaiCTF 2026	79.25	Misc	files wu 1
Untitled_Encore #reversing #constraint-solving	SekaiCTF 2026	79.25	Reverse	files wu 1
oneline6ryp7o #lattice #modular-arithmetic #mersenne-modulus	SekaiCTF 2026	79.25	Crypto	files wu 1
MSN_Revive #idor #broken-access-control	Srdnlen 2026 Quals	34.76	Web	files wu 2
Beaconing_from_above #sdr #signal-analysis #morse	Starpwn 2026	–	Misc	files wu 1
Oversized_Downlink #steganography	Starpwn 2026	–	Misc	files wu 1
Silent_Beacon #ccsds #covert-channel	Starpwn 2026	–	Misc	files wu 1
loud_packets #network-forensics #pcap #spectrogram	TJCTF 2026	–	Forensics	files wu 1
rotated #reversing #byte-rotation	TJCTF 2026	–	Reverse	files wu 1

Challenges