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All Projects → deadPix3l → Cryptsky

deadPix3l / Cryptsky

Licence: unlicense
A simple, fully python ransomware PoC

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python
139335 projects - #7 most used programming language

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malwareransomware

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CryptSky

CryptSky is an open source, fully python ransomware PoC. It's main purpose is not to be run like most software projects, but to be read for educational purposes.

Aside from very minor testing to ensure there are no syntax errors, no testing has been done. This may occur at a later time to ensure it performs in all expected environments,but that is not the point. The point is to be a simple to read PoC that makes for an easy example of what ransomware is and how it works. And hopefully, this can lead to a better understanding of ransomware in the network defense and sysadmin communities.

Warning: This project is young and incomplete. It will encrypt and decrypt files. That's about it. No key generation, no sending the key back over a secure channel, no dropping new files or wallpapers or whatever. I'll get to that. Maybe. Open an issue if you so desire, pull requests welcome.

Why?

There is a severe lack of open source ransomware, and for good reason! But by having so few examples, and those examples being inaccurate (intentionally bad code with flaws), or just too complicated, it doesn't leave much to analyze and learn from. People seem to think that ransomware is hard to write. That it's this complex, hard to develop, hard to RE, and hard to prevent beast. A quick read through of this codebase will prove that's not true. Im hoping this can lead to better signatures, a better understanding of how ransomware works and what can be done to stop it, and an overall safer internet.

Objections!

But aren't you worried someone will abuse it for profit?

  • Not really. There are plenty of much better, more advanced ransomware out there. Even if they do, it's hopefully few compared to the good it will do.

But when they do, it would be your fault!

  • Nope! I only wrote it. I didnt deploy it, I didnt sell it, it's not my problem. Hopefully nobody uses it for evil but thats the price to be paid for good. There's always someone who will do it.

But...

  • Alright. Bottom line. Security is a very reactive business. To make the world more secure you first have to make it less secure. To make better AV and signatures, you must first make better malware. And that's what we're doing here.
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