Mustard Tempest  (Back to overview)

aka: DEV-0206, Purple Vallhund

Mustard Tempest is a threat actor that primarily uses malvertising as their main technique to gain access to and profile networks. They deploy FakeUpdates, disguised as browser updates or software packages, to lure targets into downloading a ZIP file containing a JavaScript file. Once executed, the JavaScript framework acts as a loader for other malware campaigns, often Cobalt Strike payloads. Mustard Tempest has been associated with the cybercrime syndicate Mustard Tempest, also known as EvilCorp, and has been involved in ransomware attacks using payloads such as WastedLocker, PhoenixLocker, and Macaw.

Associated Families

There are currently no families associated with this actor.

2022-10-27MicrosoftMicrosoft Threat Intelligence
Raspberry Robin worm part of larger ecosystem facilitating pre-ransomware activity
FAKEUPDATES BumbleBee Clop Fauppod Raspberry Robin Roshtyak Silence DEV-0950 Mustard Tempest

Credits: MISP Project