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Gunra Ransomware's Linux Variant Has a Fatal Flaw: time()-Seeded rand() Makes Encrypted Files Recoverable Without Paying
intel.breakglass.tech

Gunra Ransomware's Linux Variant Has a Fatal Flaw: time()-Seeded rand() Makes Encrypted Files Recoverable Without Paying

TL;DR: Gunra is a Conti-derived RaaS operation that expanded to Linux with a compact 84KB ELF binary targeting enterprise servers. Our analysis of the x86-64 variant reveals a catastrophic cryptographic weakness: the Linux build generates ChaCha20 key material using musl-libc's `rand()` seeded by `t

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intel.breakglass.tech
https://intel.breakglass.tech/post/gunra-ransomware-s-linux-variant-has-a-fatal-flaw-time-seeded-rand-makes-encrypted-files-recoverable-without-paying

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