Malware
MythicRatatoskr
- First Reported
- Oct 22, 2026
- Latest Reported
- Oct 23, 2026
Reported Context (2)
- What makes the attack stand out is UAC-0099's use of a previously undocumented backdoor called MythicRatatoskr that communicates with a command-and-control (C2) server hosted inside the Yggdrasil mesh network. The ESET Details MythicRatatoskr Backdoor Used in Destructive Ukraine Attack
- It particularly focuses on the MythicRatatoskr backdoor, which is unique in its use of the Yggdrasil mesh network to communicate with a C&C server hosted within it. ESET details MythicRatatoskr backdoor in UAC-0099 and Sandworm operation
Malware (12)
People (2)
Threat Actors (4)
MITRE ATT&CK (18)
Vendors (1)
Products (4)
Tools (4)
Industries (5)
Countries (2)
Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.