ghidra Automating ghidra Ghidra is an awesome RE tool that quickly took off after its initial launch in 2019. It can display not only the disassembly of our binary but also have a
nes Solving Space Fights CTF Few months back I was solving a CTF challenge for the NES system. It was one of the Flare-On challenges for 2019. This time we will solve another one for
tamctf TAMUCtf - leaning tower There were multiple things wrong with this CTF but this one challenge was an interesting one. Windows binary, no noticeable entry point and no messages on screen. It's time to
debugging Debugging .Net applications without source code with dotPeek Symbol Server Few years ago I've made a video that demonstrates how one can debug (from Visual Studio) without having source code by using the dotPeek Symbol Server. You can see the
insomnihack Kaboom! This wasn't a difficult task but it had one tricky trick that made it took way more time than it should be required. We started with an exe file that
hitcon Core Dumb - HitCon 2019 Note: challenge was solved together with Disconnected. Damn it my flag checker is so buggy it destroyed the program itself 😱 All I left is a core dump file :( Could you
lego Hitcon 2019 Qualification - EV3 Arm It's one of those challenges that brings together two things that I like - this time it was reverse engineering nad lego bricks. What was the input in this challenge
flare-on Flare-On 2019 solutions/notes (upd. 11.02) I'm well aware that there's multiple write-ups/solutions presenting 2019's Flare-On solutions but I've decided to provide my own for two reasons. Firstly, to have some notes I can easily
SEGA Solving SEGA Genesis ROM CTF Challenge File fot the challenge can be downloaded from here. In order to run the file we need an emulator. There are few available but I've used gens. Probably a better
reversing Oldschool - CONFidence Teaser 2019 Gynvael did a survey lately to see what kind of assembly is taught in Polish universities, and if any of them is still teaching the old 8086. Let us extend
ctf Never ever be fooled to pay ransomware! — Has Your Android Phone Been Infected with Malware? — Yes! — It’s awful but we have a cure! #rev #forensics Solved together with: disconnect3d The challange was part of CTFZone 2018
radre2 Handling self-modifying code with radare2 This is a post that explains a little bit in details what was shown in the two videos that could be watched on my YT channel. If you haven't seen
gynvael GynvaelEN - Mission 023 - Solution Prefere videos? You can also watch it - if not, continue reading. Mission status: http://gynvael.vexillium.org/ext/43bf753f/mission023.txt We are given the package that consists of
ctf Stop KrkAnalytica - solution NeverLeaks is in danger and your help is needed! An anonymous hacker reported that Krakow Analytica company had prepared some actions to sabotage a befriended producer of aircraft tanks -
gynvael Gynvael - Mission 22 - Solution This was a hard one. Information about this mission can be found in stream #64 and the mission itself is here. It's in Polish but the most relevant information here
gynvael GynvaelEN - Mission 022 - Solution Blokchain. *Coin. Hot topis for today. The 22nd mission is about blokchain and about coins. SpyCoins. The mission can be found on Stream #49. The SpyCoin center is here: http:
gynvael Gynvael - Mission 021 - Solution The source for this mission can be found in stream 63. It is in Polish but it can be easily spotted that the main source is a PCAP file that
gynvael Finding "Praktyczna Inżyniera Wsteczna" last hidden flag. If you read this blog you can see that from time to time I participate in missions published by Gynvael Coldwind on his English and Polish streams. You might not
solution Assembly job offer... "Follow the white rabbit" solution In a cold Novemeber night I was standing at a bus stop and saw and advertisement on the streets of Wrocław. What was odd about it it was written purely
gynvael Gynvael - Mission 015 - Solution Last time, there was no mission on EN stream, so I've decided to describe the one from PL stream sice it was also quite a nice one. The mission is
gynvael GynvaelEN - Mission 19 - Solution Gynvael is back with streams and with missions. The 39th stream contains mission no 19 that can be found here. In this mission we are given a CHIP-8 ROM image.
ECMS ECSM 2017 CTF I really liked the last year ECSM 2016 CTF created by CERT & p4 team and I was a bit down learning that this year it was scheduled on the
p4 SecurityPWNing 2017 - p4 CTF On 6th & 7th November 2017 there was a 2nd edition of Security Pwning conference held in Warsaw and, like the last time (link1, link2), there was a CTF organized
gynvael GynvaelEN - Mission 018 - Solution This is an another GynvaelEN mission solution. This time, the task is simple. We're given a script and we nned to find the correct password to get the flag. The
gynvael Gynvael - Mission 012 - Solution This mission was on the Polish stream, but it's a nice one so I've decided to describe it anyway. If you don't understand the language let me quickly bring you
