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by cryptbe 779 days ago
Thanks for sharing. I'm one of the co-authors of the blog post. Let me know if you have any questions!

tl;dr: We analyzed a LockBit v3 variant, and rediscovered a bug that allows us to decrypt some data without paying the ransom. We also found a design flaw that may cause permanent data loss. Nothing's earth-shattering, but it should be a fun read if you're into crypto and security!

1 comments

Respectfully, doesnt sharing this information ensure that whoever is behind LockBit can improve and fix it? Surely that isnt desirable?
From the article:

> The crypto bug is already known to the malware author. We have observed newer variants where we can no longer take advantage of this bug.

I think the first few paragraphs of the article explain why analysis is worthwhile pretty succinctly.