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General

  • Target

    a20b91e4573d2870c31957fc1f1dff4188e24a3350546d939a6731339639d200

  • Size

    215KB

  • Sample

    221219-afxyjadh92

  • MD5

    a6b34e07b802a18f9e57443f28ec7c1b

  • SHA1

    b80007dcd6643c7f549e27bacb92eb12be9a542e

  • SHA256

    a20b91e4573d2870c31957fc1f1dff4188e24a3350546d939a6731339639d200

  • SHA512

    54ec8d1534e1be24fa48e3fbb0b1fbbf8719e299710f11df85da57f8f2c8a99f6e717003dad9b6cb8f4eb691d1ded831927806879513dc339a7185ad446bf808

  • SSDEEP

    6144:iWvlLnrlMm5wI4IdAss7j70X4UdO51jcbXF:iWNjBIc8v0Zu1YbXF

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      a20b91e4573d2870c31957fc1f1dff4188e24a3350546d939a6731339639d200

    • Size

      215KB

    • MD5

      a6b34e07b802a18f9e57443f28ec7c1b

    • SHA1

      b80007dcd6643c7f549e27bacb92eb12be9a542e

    • SHA256

      a20b91e4573d2870c31957fc1f1dff4188e24a3350546d939a6731339639d200

    • SHA512

      54ec8d1534e1be24fa48e3fbb0b1fbbf8719e299710f11df85da57f8f2c8a99f6e717003dad9b6cb8f4eb691d1ded831927806879513dc339a7185ad446bf808

    • SSDEEP

      6144:iWvlLnrlMm5wI4IdAss7j70X4UdO51jcbXF:iWNjBIc8v0Zu1YbXF

    • 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 Enterprise v6

Tasks