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General

  • Target

    file.exe

  • Size

    303KB

  • Sample

    221219-v39wtsaf5y

  • MD5

    9d7c55bebffc368b36387a730bca3591

  • SHA1

    32499cd446ef5d6e89f9b4a6c03227132afd1fde

  • SHA256

    6ade32487b2109f96484539acb27c74e03f7ec48f14075e6c7618547fa2c4773

  • SHA512

    da862b30ffb028ae301fabdde4569fcca3b9551b4ba245c2f0e5a342efe4db4c1549cc45e48360fe8704f3bb8439c063854eb6b6e1d773c4f38d664836fc0527

  • SSDEEP

    6144:CLlP8ArUNJD0QQtrWTvXz+3ng+E49HwchLP3i:CN8A6JD0QQtrW/wnVZH9P3

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      303KB

    • MD5

      9d7c55bebffc368b36387a730bca3591

    • SHA1

      32499cd446ef5d6e89f9b4a6c03227132afd1fde

    • SHA256

      6ade32487b2109f96484539acb27c74e03f7ec48f14075e6c7618547fa2c4773

    • SHA512

      da862b30ffb028ae301fabdde4569fcca3b9551b4ba245c2f0e5a342efe4db4c1549cc45e48360fe8704f3bb8439c063854eb6b6e1d773c4f38d664836fc0527

    • SSDEEP

      6144:CLlP8ArUNJD0QQtrWTvXz+3ng+E49HwchLP3i:CN8A6JD0QQtrW/wnVZH9P3

    • 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