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General

  • Target

    file.exe

  • Size

    304KB

  • Sample

    221220-a6x18agd99

  • MD5

    28ed64d08b23133f1bb4262b3f12207f

  • SHA1

    733414e08c1177250ad6b7c5efd0c98d67fa432f

  • SHA256

    8c10f61f52638d29875ff12435258e8f9a3a692727eeb479f1a113f42d9fca0b

  • SHA512

    533cc0241a9101c19d62d25ee690b90fc4425962cee65598fce9492abc81c40912293e13518e045fd6807081010dd912b9670f4ce8e7b3e855594560832d758e

  • SSDEEP

    6144:I/L9CEzLMwVvKbQf/mfZdXFGfqN4/63QZImQKG0:2pCEx+QWffFDbQZW

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      304KB

    • MD5

      28ed64d08b23133f1bb4262b3f12207f

    • SHA1

      733414e08c1177250ad6b7c5efd0c98d67fa432f

    • SHA256

      8c10f61f52638d29875ff12435258e8f9a3a692727eeb479f1a113f42d9fca0b

    • SHA512

      533cc0241a9101c19d62d25ee690b90fc4425962cee65598fce9492abc81c40912293e13518e045fd6807081010dd912b9670f4ce8e7b3e855594560832d758e

    • SSDEEP

      6144:I/L9CEzLMwVvKbQf/mfZdXFGfqN4/63QZImQKG0:2pCEx+QWffFDbQZW

    • 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