General

  • Target

    fa3eba33e8992d8938c55f208b8acdde763a0509a3918592ef8d333bda1eb5f4

  • Size

    145KB

  • Sample

    240417-qkm7wsaf4x

  • MD5

    37cf5757cf2726b2a8290b19456ed3ff

  • SHA1

    fcf2259855e3d6f7e001bce0d07345b70e2064ff

  • SHA256

    fa3eba33e8992d8938c55f208b8acdde763a0509a3918592ef8d333bda1eb5f4

  • SHA512

    0ba7d1b0ac62c74b9dd779c719adbc2af1a1b7a639e605528362ff81845b6485f48bc659d84951534217def1fbf985b6c462dbfe8fc7863dfee502900b548e8f

  • SSDEEP

    3072:lYgG5A54J4MMDtlu/DD6fdLbOQPrlQIp2xeGim:Sjq4iMMrSIOQJHp2xdX

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

    • 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