General

  • Target
    file.exe
  • Size 276KB
  • Sample221202-h5jq7sec55
  • SHA256 b88b9ed4918755d2ee5d4e8ec49915b6b0991cff51fd6d65f75e02757af71d10
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • jotunheim.name

Targets

    • Target
      file.exe
    • Size 276KB
    • SHA256 b88b9ed4918755d2ee5d4e8ec49915b6b0991cff51fd6d65f75e02757af71d10
    • MD5 SHA1 SHA512 SSDEEP
    • Tofsee

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

    • 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.

    • Loads dropped DLL

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks