October 23, 2026
- MythicRatatoskr hides its C2 inside the Yggdrasil mesh network. ESET documents a previously unreported Go backdoor used against a Ukrainian grain logistics firm: UAC-0099 gained initial access on July 16, 2025 and handed it to Sandworm, which ran a data-wiping attack on September 17, 2025. ESET · Threat Activity
in Two Unpatched KSMBD RCEs Go Public — and an AI Scanner Found Them