General

  • Target

    file.exe

  • Size

    147KB

  • Sample

    221126-jqy31sdb87

  • MD5

    245a32c6b70bf744448625ca6d897a57

  • SHA1

    67a7ca7893d555651eb6a38bc22fb9aeacffcec2

  • SHA256

    dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963

  • SHA512

    aa40eb9fd15e087b346086421b6efdbecc97980868d1404fa32e8ca90a118f3986aef668554ba67badf1dc58ef88c1d688ebe193fed3d3f5dd435d392d3665af

  • SSDEEP

    3072:GFuoANbriTl655frf0zvNDoM2bTXtFW5mMSjv:JbbrHT0zxnoTeo

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      147KB

    • MD5

      245a32c6b70bf744448625ca6d897a57

    • SHA1

      67a7ca7893d555651eb6a38bc22fb9aeacffcec2

    • SHA256

      dc0ec3405d05046753c376f33fcd545d03b4781983d4b26103de9419b4334963

    • SHA512

      aa40eb9fd15e087b346086421b6efdbecc97980868d1404fa32e8ca90a118f3986aef668554ba67badf1dc58ef88c1d688ebe193fed3d3f5dd435d392d3665af

    • SSDEEP

      3072:GFuoANbriTl655frf0zvNDoM2bTXtFW5mMSjv:JbbrHT0zxnoTeo

    • Tofsee

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

    • Windows security bypass

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks