[Tarrask](https://attack.mitre.org/software/S1011) is malware that has been used by [HAFNIUM](https://attack.mitre.org/groups/G0125) since at least August 2021. [Tarrask](https://attack.mitre.org/software/S1011) was designed to evade digital defenses and maintain persistence by generating concealed scheduled tasks.(Citation: Tarrask scheduled task)