General

  • Target

    file.exe

  • Size

    257KB

  • Sample

    231106-z96j7sfd3y

  • MD5

    9bf9d2d2458691bcf8a3b7a199e98006

  • SHA1

    91a26106e563d2ce08626c0da03b127b0a35ba49

  • SHA256

    86570d92983f1a55ec9e12b7185bf966f5294b13a2d1ab185896145eb52ffb58

  • SHA512

    40fd6561b45dc7708392fff0b4ee3076b7221a421176e0a0126c732eda25d2cc4f1bf57cd7ac298efc28ca349acdeb61a23036342dd0886f10f0e0f6cfac6ece

  • SSDEEP

    3072:9sDXcvgMzU8rGm7RJSFdHi0OR1yU/ZPWxWXnF9cp7sV39zdthH:Weg7BOJSy0OR1B+gXkOVN/

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      257KB

    • MD5

      9bf9d2d2458691bcf8a3b7a199e98006

    • SHA1

      91a26106e563d2ce08626c0da03b127b0a35ba49

    • SHA256

      86570d92983f1a55ec9e12b7185bf966f5294b13a2d1ab185896145eb52ffb58

    • SHA512

      40fd6561b45dc7708392fff0b4ee3076b7221a421176e0a0126c732eda25d2cc4f1bf57cd7ac298efc28ca349acdeb61a23036342dd0886f10f0e0f6cfac6ece

    • SSDEEP

      3072:9sDXcvgMzU8rGm7RJSFdHi0OR1yU/ZPWxWXnF9cp7sV39zdthH:Weg7BOJSy0OR1B+gXkOVN/

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks