QuietSieve (Malware Family) By Fraunhofer FKIE Archived: 2026-04-05 13:23:28 UTC win.quietsieve (Back to overview) QuietSieve Actor(s): Gamaredon Group According to Microsoft, this is a heavily obfuscated .NET malware, primarily geared towards the exfiltration of data from the compromised host. But it can also receive and execute a remote payload from the operator. References 2022-02-04 ⋅ Microsoft ⋅ Microsoft Digital Security Unit (DSU), Microsoft Threat Intelligence Center (MSTIC) ACTINIUM targets Ukrainian organizations DilongTrash DinoTrain Pteranodon QuietSieve Gamaredon Group 2022-02-04 ⋅ Microsoft ⋅ Microsoft Digital Security Unit (DSU), Microsoft Threat Intelligence ACTINIUM targets Ukrainian organizations Pteranodon QuietSieve DEV-0586 There is no Yara-Signature yet. Source: https://malpedia.caad.fkie.fraunhofer.de/details/win.quietsieve https://malpedia.caad.fkie.fraunhofer.de/details/win.quietsieve Page 1 of 1