General

  • Target

    b71d20e4a1e5802a036f25430a6a77fbf9d30fdc193f0ea8fab29dbda81652ee

  • Size

    215KB

  • Sample

    221218-j8lkmsea5v

  • MD5

    2551cee982c6989c321a7c0694a7cb79

  • SHA1

    6b85705c7547f05f64101cc91cd12aca355a16a3

  • SHA256

    b71d20e4a1e5802a036f25430a6a77fbf9d30fdc193f0ea8fab29dbda81652ee

  • SHA512

    be34c95f449cf0856e4b84d11a6f269b38d11d1af34dc3f4755a5e2269422168befe38a3c273354e8cd1267b6b89197a2e060c628585596b5d8859aefc98e788

  • SSDEEP

    6144:NeX60Lf9ZJDfuxTPXcSg3ClhpJow0U0VB:NeXPDRixKSnpWwZO

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      b71d20e4a1e5802a036f25430a6a77fbf9d30fdc193f0ea8fab29dbda81652ee

    • Size

      215KB

    • MD5

      2551cee982c6989c321a7c0694a7cb79

    • SHA1

      6b85705c7547f05f64101cc91cd12aca355a16a3

    • SHA256

      b71d20e4a1e5802a036f25430a6a77fbf9d30fdc193f0ea8fab29dbda81652ee

    • SHA512

      be34c95f449cf0856e4b84d11a6f269b38d11d1af34dc3f4755a5e2269422168befe38a3c273354e8cd1267b6b89197a2e060c628585596b5d8859aefc98e788

    • SSDEEP

      6144:NeX60Lf9ZJDfuxTPXcSg3ClhpJow0U0VB:NeXPDRixKSnpWwZO

    • 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