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MythicRatatoskr: An Yggdrasil-enabled backdoor deployed in a UAC-0099-Sandworm collaboration

๐Ÿ“… October 22, 2026 ๐Ÿ“ฐ www.welivesecurity.com ๐Ÿ” 0 CVE(s) referenced

UAC-0099 used the newly discovered Yggdrasil-enabled MythicRatatoskr backdoor to breach a Ukrainian grain logistics firm before handing access to Sandworm for a destructive data-wiping attack.

unclassified

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