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General

  • Target

    file.exe

  • Size

    220KB

  • Sample

    221221-gyq19sbg52

  • MD5

    b8801008c417b5243fc3f23efd398464

  • SHA1

    103c056f4f343f61022b727a4b325bd5f9c50c69

  • SHA256

    9ed5c8903da45b632845d7a4288e2da852650ddf6762068908da5b6e6b70c9a6

  • SHA512

    e17434f7e6ec74d74b268b36afe80d5400339963a8b8b2972b8342d629f0b7e89d3a0dd805a412f01d34b30deda6238898d64b80bdc245b8f93c70862f96f4d5

  • SSDEEP

    3072:iPqFpLpqwt15WI/PhYR1e58niPr4V7b/oU/Yw8Co1NHCDml:NHLpqw/3ee5WiPMFww8CoHCa

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      220KB

    • MD5

      b8801008c417b5243fc3f23efd398464

    • SHA1

      103c056f4f343f61022b727a4b325bd5f9c50c69

    • SHA256

      9ed5c8903da45b632845d7a4288e2da852650ddf6762068908da5b6e6b70c9a6

    • SHA512

      e17434f7e6ec74d74b268b36afe80d5400339963a8b8b2972b8342d629f0b7e89d3a0dd805a412f01d34b30deda6238898d64b80bdc245b8f93c70862f96f4d5

    • SSDEEP

      3072:iPqFpLpqwt15WI/PhYR1e58niPr4V7b/oU/Yw8Co1NHCDml:NHLpqw/3ee5WiPMFww8CoHCa

    • Tofsee

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

    • Windows security bypass

    • 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.

    • Deletes itself

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks