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General

  • Target

    file

  • Size

    298KB

  • Sample

    231014-cms92ada94

  • MD5

    5182e126b6f798ddb20ac56c5ab4660d

  • SHA1

    467a4e7708679aac87c2a4e98b9c69eba12dc21b

  • SHA256

    d7b88f392653a4569f1f6a792d27ed75dcb22921915ff2cff23519d6eb8c673a

  • SHA512

    37b25dc5c340817881922fc7b9fa4a06e1954cae86afee74d174c905e7be366edfe9329888bbcd46d3c8bae1d295c7dd13e0b78bc408d341b5d5d42c7301d4b8

  • SSDEEP

    3072:w+uHkj3i/Gur0Z6sZgrKBRTM+4FvH9vxrFUkcVTcgpWvKV/Fy2L3:4Hci/GuoZ6pmBSJrJpUpV4gEY4

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      298KB

    • MD5

      5182e126b6f798ddb20ac56c5ab4660d

    • SHA1

      467a4e7708679aac87c2a4e98b9c69eba12dc21b

    • SHA256

      d7b88f392653a4569f1f6a792d27ed75dcb22921915ff2cff23519d6eb8c673a

    • SHA512

      37b25dc5c340817881922fc7b9fa4a06e1954cae86afee74d174c905e7be366edfe9329888bbcd46d3c8bae1d295c7dd13e0b78bc408d341b5d5d42c7301d4b8

    • SSDEEP

      3072:w+uHkj3i/Gur0Z6sZgrKBRTM+4FvH9vxrFUkcVTcgpWvKV/Fy2L3:4Hci/GuoZ6pmBSJrJpUpV4gEY4

    • 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)

    • 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

    • Executes dropped EXE

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks