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General

  • Target

    file

  • Size

    294KB

  • Sample

    231010-hq4stsbf7t

  • MD5

    44b65e6b1c5c97f08604d6386e073755

  • SHA1

    ef3a38c06da42adf5855c9ca04afc3a264189abb

  • SHA256

    6414aa1f08ec3168c6c2630d3ebd5d9a184c0520bfa3c8018d23e74ee088021c

  • SHA512

    bd397b6eafdecfa6e72bb990757650566512a4c7eb12d75479fa9ef7a481542be9ccb57f538f0ed4d2e4fe77444c3aa99043b0b78663d8c740f6736ec8d84e60

  • SSDEEP

    6144:U5ZKe+CEiMKqR3p5X0WVKwn01r7ufeQRM:UzB+CEfv3p5XtVKpCmQ

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      294KB

    • MD5

      44b65e6b1c5c97f08604d6386e073755

    • SHA1

      ef3a38c06da42adf5855c9ca04afc3a264189abb

    • SHA256

      6414aa1f08ec3168c6c2630d3ebd5d9a184c0520bfa3c8018d23e74ee088021c

    • SHA512

      bd397b6eafdecfa6e72bb990757650566512a4c7eb12d75479fa9ef7a481542be9ccb57f538f0ed4d2e4fe77444c3aa99043b0b78663d8c740f6736ec8d84e60

    • SSDEEP

      6144:U5ZKe+CEiMKqR3p5X0WVKwn01r7ufeQRM:UzB+CEfv3p5XtVKpCmQ

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Windows security bypass

    • 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