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fsharp

@fsharp123

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Following
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Cybersecurity hobbyist @DeadSecCTF, @malta_ctf and @ctfminions. Mainly interested in reverse engineering and forensics.

Joined November 2022
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@fsharp123
fsharp
2 months
Last week, I played QnQSec CTF 2025 with @DeadSecCTF and solved several reverse engineering challenges, one of which only got 3 solves out of 738 teams. I enjoyed solving it and made a writeup: https://t.co/uA0ldt0iga Thanks to @qnqsec for the fun CTF!
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@fsharp123
fsharp
6 months
I played bi0sCTF 2025 with @DeadSecCTF and got first blood🩸on one of the reverse engineering challenges! This was really fun and I made a writeup on it: https://t.co/WFVjITUg5R Thanks to @teambi0s for the cool challenges!
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@fsharp123
fsharp
11 months
A week ago, I played IrisCTF 2025 with @DeadSecCTF and solved the hardest reverse engineering challenge (7 solves out of 1064 teams). It really tested my WASM reversing skills! This is my writeup on it: https://t.co/sLbAezswNI Many thanks to @IrisCTF for hosting a great CTF!
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@fsharp123
fsharp
1 year
Got through the first half of #flareon11 yesterday, and now I'm stuck trying to understand the goal behind level 6. I think I know what should happen if I did 'the right thing,' but currently I don't see how to figure that out. Is it okay if I asked the author for clarification?
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@fsharp123
fsharp
1 year
In UIUCTF 2024, I got second blood on a reverse engineering challenge ('tooooo fancy') that was solved by only 6 teams out of 958. It was very interesting and I made a writeup on it: https://t.co/2upF5vFyNZ Thanks to @sigpwny for hosting a fun CTF and congrats to the winners!
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@fsharp123
fsharp
2 years
I played @Bugcrowd's CTF alone and placed 4th out of 325 teams! The challenges were interesting and some of them were quite tough, especially the ones in the web and OSINT categories. Congrats to the winners and thanks for the fun CTF!
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@fsharp123
fsharp
2 years
Has anyone solved flake from #flareon10 the way I did? To bypass the snake length check, I patched the hardcoded high score to a low number. I then bypassed the constants object CRC check during runtime and played the game normally. No need to mess with the config file.
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@fsharp123
fsharp
2 years
After 27 days, 5 hours and 38 minutes, I've cleared #flareon10. My favourite challenges are FlareSay, kupo and over_the_rainbow. Looking forward to next year's Flare-On CTF!
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