Developer - Reverse Engineer - CTF player - Scrub. 🔧 I develop #AsmResolver, ✍️ blog at blog.washi.dev/, and sometimes 👾 hack with @Shellphish
McMurdo Station, Antarctica
- Tweets 277
- Following 109
- Followers 1,957
- Likes 521
Pinned Tweet
Did you know you could write entire #csharp programs just by using the "await" keyword?
OK, well not really, but I spent some weekends developing AwaitFuscator: A (dumb) #obfuscator that turns your #dotnet program into nothing but "await" expressions!
👉blog.washi.dev/posts/awaitfu…
5
33
134
25,879
So who is down to set up a human-only leaderboard for this year🙃
#flareon13
I gave Opus one prompt and all nine Flare-On 12 challenges. It solved them all in 4h 28m. No IDA, no decompiler, no debugger, and it never ran a single binary. Python with capstone, unicorn and z3.
More info 👇
#FlareOn #ReverseEngineering #CTF
3
5
42
6,171
Never would I have expected this for a spare time hobby project. 1 million downloads is crazy, thank you all ❤️
#asmresolver #malware #dotnet #reversing
2
4
69
2,832
The timer for #flareon13 started on flare-on.com
I will likely participate, but not sure I will try to speed-solve it like previous years.
Last year was already somewhat pay-to-win. I expect this year to be worse. I don't see any fun in competing against unlimited AI
1
9
61
4,146
I hate writing pattern-matching code for function identification in my .NET #deobfuscator and config extractor. So I built a tool to help me out with it.
Meet CILFI: A function identification tool for .NET binaries:
👉blog.washi.dev/posts/cilfi/
#dotnet #reversing #malware #ioc
3
50
221
10,704
This is actually a very well-explained beginner series on #dotnet #reversing. We need more good beginner-friendly sources like these.
🧩 Video 2 in the .NET obfuscation series is now public!
piped.video/6rcUxmRGhlg
In this video we'll explore the Global Module Constructor (.cctor) to analyze the impact of anti-debugging and anti-tamper protections.
3
24
2,318
Custom attributes in #dotnet give me nightmares.
Read my new blog post to learn why:
👉blog.washi.dev/posts/custom-…
#reversing #malware #pe #binary #asmresolver
1
12
44
4,306
#AsmResolver 6.0.0 is finally here!
- Support for more PE architectures
- Supercharged .NET multi-assembly processing
- Compatible with NixOS and legacy .NET FX 3.5
- Many API improvements
- Massive performance boosts
👉github.com/Washi1337/AsmReso…
#pe #dotnet #reversing #malware
17
72
4,613
Washi retweeted
The first release candidate of dnSpyEx 6.6.0 is now available for download.
github.com/dnSpyEx/dnSpy/rel…
2
25
90
14,369
Washi retweeted
Taka 📦‼️
The PC port of Twilight Princess is near, its being shown playable, and was showcased on stream. It might just be days away from its final release.
Twilight Princes Dusk is a native port for PC/Android/Linux/Mac and iOS. We are so close!
282
2,989
20,738
1,610,716
You can call me a "nerd" that's fine. Making a mistake is also fine!
Unnecessary sensationalism is not fine. You have a big following. I'm asking you to be responsible with it.
9
616
ILSpy does not and never has owned a WordPress. See github.com/icsharpcode/ILSpy…
Maybe consider verifying your "news" before spreading false information and fear mongering.
6
467
Washi retweeted
UPDATE: our work won a best paper award 🏆 @NDSSSymposium! Check out our work on establishing the first measurements for understanding how LLMs are changing reverse engineering.
Shout out to the whole team from @SCAI_ASU, @EURECOM, and @UniPadova
Do LLMs actually help hackers reverse engineer and understand the software they want to exploit?
We ran the first fine-grained human study of LLMs + reverse engineering.
To appear at NDSS 2026.
Interested? Some quick findings in 🧵👇
Paper: zionbasque.com/files/papers/…
4
17
68
4,282
Over the past couple years, I have come to know the #dotnet platform pretty well, from a developer's and a #reversing standpoint.
I can’t always say the same the #infosec community.
Today, I decided to rant a little (or maybe a lot 🙃)
👉 blog.washi.dev/posts/misconc…
4
23
72
5,290
Washi retweeted
Pwndbg 2026.02.18 is out!
We visualize branches in nearpc, sync ur decompiler (IDA/Binja/Ghidra) via decomp2dbg, annotate stack vars from dbgsyms/decomp, added new cmds for tracing kernel allocs/frees, dump task info: github.com/pwndbg/pwndbg/rel…
Sponsor us: github.com/sponsors/pwndbg/
2
123
662
43,821
Maybe noob question. Why do we care whether malware was created with help of AI?
I see people talking about it like it matters a lot, but for us defenders, it's still just code that you can reverse/write rules for, no? Besides, it's not as if most malware wasn't slop already..🙃
9
3
40
35,177
Better late than never, I finally managed to finalize my #flareon12 write-ups😄
Overall, it was a fun set of challenges and the latter ones a reminder of how much I still have to learn in the field of RE :).
👉 blog.washi.dev/posts/flareon…
👉 washi1337.github.io/ctf-writ…
1
20
101
7,118
Washi retweeted
Do LLMs actually help hackers reverse engineer and understand the software they want to exploit?
We ran the first fine-grained human study of LLMs + reverse engineering.
To appear at NDSS 2026.
Interested? Some quick findings in 🧵👇
Paper: zionbasque.com/files/papers/…
4
71
238
26,176