[STARWHALE](https://attack.mitre.org/software/S1037) is Windows Script File (WSF) backdoor that has been used by [MuddyWater](https://attack.mitre.org/groups/G0069), possibly since at least November 2021; there is also a [STARWHALE](https://attack.mitre.org/software/S1037) variant written in Golang with similar capabilities. Security researchers have also noted the use of [STARWHALE](https://attack.mitre.org/software/S1037) by UNC3313, which may be associated with [MuddyWater](https://attack.mitre.org/groups/G0069).(Citation: Mandiant UNC3313 Feb 2022)(Citation: DHS CISA AA22-055A MuddyWater February 2022)