Windigo
UnattributedNo public state or group attribution on record
The Windigo group has been operating since at least 2011, compromising thousands of Linux and Unix servers using the Ebury SSH backdoor to create a spam botnet. Despite law enforcement intervention against the creators, Windigo operators continued updating Ebury through 2019.
Full MITRE ATT&CK profileNo recent coverage in the current feed. This actor may be quiet, or reporting hasn't used a matched alias.