ESET researchers uncover MythicRatatoskr – a previously unknown Go-based backdoor hiding its C&C server inside the Yggdrasil mesh network – that paved the way for a destructive attack against a Ukrainian grain firm
https://www.welivesecurity.com/en/eset-research/mythicratatoskr-yggdrasil-enabled-backdoor-deployed-uac0099-sandworm-collaboration/ https://www.welivesecurity.com/en/eset-research/mythicratatoskr-yggdrasil-enabled-backdoor-deployed-uac0099-sandworm-collaboration/ MythicRatatoskr: An Yggdrasil-enabled backdoor deployed in a UAC-0099-Sandworm collaboration ESET researchers uncover MythicRatatoskr – a previously unknown Go-based backdoor hiding its C&C server inside the Yggdrasil mesh network – that paved the way for a destructive attack against a Ukrainian grain firm Thu, 22 Oct 2026 08:45:00 +0000 https://web-assets.esetstatic.com/wls/2026/10-26/mythicratatoskr/mythicratatoskr-yggdrasil-uac0099-sandworm.jpg ESET research