General

  • Target

    04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

  • Size

    145KB

  • Sample

    240417-qtr77shf89

  • MD5

    46396685d6c3c88c83d394dd4d865134

  • SHA1

    e99940ab28943292a4d369cf852d99b93fde7aa2

  • SHA256

    04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

  • SHA512

    f82d4decea0703830ff192a6ec158436c015689a1ff9148d25cc8932e5f2e14cbd727a1ee828a3cf1965899d72fdd03da986681d7b2b58f83cf03b615dc6290f

  • SSDEEP

    3072:TYuZ0iOn69VopPtDUnPweDwq8qU9lytEbX2jz7SwyfjhUn4PMUX:T3Z0l69hWgtcdFm4BX

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

    • Size

      229KB

    • MD5

      ddb3205a92ff18ae17b3f9f93c7b197c

    • SHA1

      b77c666a2d7b1f63ba08316f9a221be6ac1f786a

    • SHA256

      7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8

    • SHA512

      db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334

    • SSDEEP

      3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks