General

  • Target

    7196952c771fc2af2f2ecaca6aec4648acd85c9c9b6260cad41c8da95cec5cff

  • Size

    184KB

  • Sample

    221130-k3a3dsab31

  • MD5

    f0c2719a62638cdeaf543cc1ff1ade75

  • SHA1

    2a34315df7fa088d121ba375e88f9dff7b73040b

  • SHA256

    7196952c771fc2af2f2ecaca6aec4648acd85c9c9b6260cad41c8da95cec5cff

  • SHA512

    485e5a02c40954f5bc1af1d241bf3498193e1e6ed569f07b4d5d159c49d07a04485db03bbf9b036cb6b03962cd091f30755fd1a54fa44f4e81daf0112e5b7298

  • SSDEEP

    3072:gDnMT3UVa/u9IK53G7bhbJSIqPlNPHrHL9027XSgm3qEy:WMLl/uVCbhNxqnZ027Cguq

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      7196952c771fc2af2f2ecaca6aec4648acd85c9c9b6260cad41c8da95cec5cff

    • Size

      184KB

    • MD5

      f0c2719a62638cdeaf543cc1ff1ade75

    • SHA1

      2a34315df7fa088d121ba375e88f9dff7b73040b

    • SHA256

      7196952c771fc2af2f2ecaca6aec4648acd85c9c9b6260cad41c8da95cec5cff

    • SHA512

      485e5a02c40954f5bc1af1d241bf3498193e1e6ed569f07b4d5d159c49d07a04485db03bbf9b036cb6b03962cd091f30755fd1a54fa44f4e81daf0112e5b7298

    • SSDEEP

      3072:gDnMT3UVa/u9IK53G7bhbJSIqPlNPHrHL9027XSgm3qEy:WMLl/uVCbhNxqnZ027Cguq

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Creates new service(s)

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets service image path in registry

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks