::-1
Jujutsu High reviewed your technique twice and certified it completely harmless. Please try to look surprised when the paperwork catches…
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Challenge
15 writeups
18 writeups
~/ARCHIVE / MEMORY MAP
Challenge
archive.
CTF writeups, complete solvers, and original labs organized by event, category, and difficulty.
Choose an event or search its writeups.60 challenges
COLLECTION // 01
Securinets ENIT Friendly CTF 2026
Pwn challenges authored by r3t0x for Securinets ENIT Friendly CTF 2026.
12 challengesBlack Flash
Jujutsu High's cursed-tool shop is running a Black Flash Sale. Your wallet is weak, the minimum order is absurd, and accounting insists…
CALCULUS II
F**k calculus…
Forbidden Vocabulary
Jujutsu High reviewed your technique and declared it completely safe. The review lasted eleven seconds, so naturally nothing can go wrong.
Grade 4 Technique
Your cursed technique has finally been approved for live demonstration. The evaluators have lowered their expectations accordingly. Try…
Infinite Void
Unlimited knowledge is included. Exporting it requires the premium plan, which your team apparently could not afford.
NAH
Jujutsu High sealed a special-grade cursed object behind its newest barrier. You are a Grade 4 sorcerer with no clearance, no technique…
Reach Back
The secret was already delivered. You just need to remember where the caller left it. Upload one x86-64 shared object exporting `solve`…
Read It and Weep
Jujutsu High prints every complaint exactly as submitted. Your opinion matters almost as much as their memory-safety policy.
Return Policy
Jujutsu High guarantees every trainee returns safely. The guarantee was written by the same people who approved this program.
Special Grade Paperwork
Jujutsu High hired a special-grade security committee and gave it a clipboard. Your data has never been safer, statistically speaking.
Strongest Argument
Gojo said a strong argument wins every debate. You brought confidence; the CPU is still waiting for an actual value.
COLLECTION // 02
Securinets Friendly CTF 2026
Official misc and pwn walkthroughs from Securinets Friendly CTF 2026.
33 challengesCATEGORY // 01
Misc
APPROVED
No further action was requested.
are MATH D'ING
You look very confident. Adorable.
Banned in Leonida
Rockstar banned the words responsible for the leak. The leak did not get the memo.
BEGNERZZZZ MAXIING
Maxed out the LARP build and left evidence at level one.
Cheat Code
Rockstar left the developer console in the release build. Quality control must have been watching the trailer.
EMPTY THREATS
Bro wrote a whole paragraph and still said nothing.
FLOATING RECEIPTS
The numbers are real. The receipts are questionable.
Follow Me
I asked for the file, not its life story.
Human After All
Haters gonna say it s AI…
JS 1.0
Parser vs filter. We taught a regex to understand JavaScript. The language specification can retire now.
PAID IN FULL
Accounting insists this invoice is ordinary. It looks right, prints right, and even copy-pastes right. Still, something in the type does…
POSTMORTEM
One byte was wrong. The process has prepared several megabytes of excuses.
TRAFFIC LIGHTS
CyberLeek synchronized every traffic light in Vice City. The pattern was never meant for drivers.
UNIX
Two codes are already on the screen. Predict the next one, Professor Probability. Go on. The machine could use a laugh.
VICE CITY FM
Vice City FM lost every song, but the playlist still remembers how long each track was supposed to last.
CATEGORY // 02
Pwn
2nd_download
Rockstar's relay records only the beginning of every transfer before launching it. CyberLeek knows the opening fragment was never meant…
BETTER CALL WAWA
Some names never leave the contact list. When every Rockstar line went silent, one number still answered: WAWA. CyberLeek has one call to…
Chop's Last Fetch
CyberLeek entrusted the final piece of the GTA VI build to the only courier in Los Santos who could never be bribed, traced, or…
Cyberleek Hotline
Cyberleek loves using netcat, so use it to cooperate with him.
CyberLeek's Burner
CyberLeek's burner phone has started receiving fragments from somewhere inside Vice City. Every transmission disappears almost…
CyberLeek's Final Upload
The final GTA VI archive is already leaving Rockstar's internal network. CyberLeek reached the relay, but the interface was destroyed and…
Drop a Pin
The getaway driver refuses to move without an exact pickup point. Give him the right location and CyberLeek's next upload is yours. Miss…
Full Heat
Rockstar put all of Leonida on lockdown. Surely that will stop CyberLeek this time.
GATEWAY
A burner call exposed one live Rockstar location. CyberLeek has one shot to enter the archive, steal the build, and disappear before the…
Night Shift
The night desk is open.
Off the Radar
Rockstar's new wanted system knows more than how many stars you have. CyberLeek is visible, identified, trapped inside the search area…
One Street Over
CyberLeek's escape route was almost perfect. The final build is not across Leonida. It is only one street away from where the driver…
RADIO
Rockstar says the signal is gone. CyberLeek disagrees.
skiiiiiip
Rockstar's archive always begins with one final security sequence. Anyone who watches from the first frame is immediately removed.
The First Leek
Rockstar called it a rumor. CyberLeek called it Tuesday. Something from GTA VI escaped into the streets of Leonida, and everyone who…
The Spill
Rockstar insists the situation is contained. CyberLeek recommends checking the floor.
Works on My Machine
It worked perfectly on the developer's laptop. If it misbehaves now, that sounds impressively like your problem.
XYZ
Every time CyberLeek reconnects, Rockstar's relay broadcasts a different location. It arrives without a label, a sender, or instructions.
COLLECTION // 03
MOJO-JOJO CTF
Original pwn challenges authored for the MOJO-JOJO CTF collection.
8 challengesCS 12.06 - SYSTEM 2.0
XIIVI ONCE SAID "IINEK DIMA AL HOLILA"…
dl
A dynamic loader exploitation challenge. Abuse the linker's resolution mechanism to hijack control flow and redirect execution to your…
HIP-HOP
MOJO-JOJO CTF binary-exploitation writeup.
MOJO_LAB
MOJO-JOJO CTF binary-exploitation writeup.
Oracle
The Oracle knows all — but can you make it speak? Exploit a format string vulnerability to leak secrets from memory and gain arbitrary…
ret2libc
Classic return-to-libc attack. The stack is non-executable, but libc is loaded and ready. Leak a libc address, calculate offsets, and…
Two Echoes - Revenge
MOJO-JOJO CTF binary-exploitation writeup.
Warmup
A beginner-friendly buffer overflow warmup. Smash the stack, overwrite the return address, and redirect execution to the win function. No…
COLLECTION // 04
FST Bootcamp
Binary-exploitation training labs created for the FST Bootcamp.
7 challengesb0f
Buffer overflow 101. A straightforward stack smashing exercise — overflow the input buffer and take control of EIP/RIP. Your entry ticket…
captchahell
Bypass a CAPTCHA-protected service by exploiting a binary vulnerability lurking behind the verification layer. Solve the puzzle, find the…
Expertly Secured
Our system is so secure, it's actually insulting that you're even trying to look at it. We've implemented the latest "Trust Me Bro"…
please
Sometimes all you have to do is ask nicely... or exploit the binary's trust. Manipulate the input to satisfy conditions and trick the…
ret2shellcode
NX is off — the stack is executable. Inject your shellcode, find the buffer address, and redirect execution straight into your payload.
ret2vault
The vault function holds the treasure but no direct path leads there. Overflow the buffer, chain your gadgets, and return straight into…
The Fragmented Scribe
The scribe is dying. The message is breaking. Only 100 fragments (bytes) remain. The language has been stripped of its direct commands…
0x00000000
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