Analysis

  • max time kernel
    135s
  • max time network
    109s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-08-2024 18:58

General

  • Target

    c58a6b85fd1ecf61086b52f3a3794a1f_JaffaCakes118.exe

  • Size

    170KB

  • MD5

    c58a6b85fd1ecf61086b52f3a3794a1f

  • SHA1

    ab2fcc8ed5ee1d7efdfc808a8caaf54fae5b8f5f

  • SHA256

    a96551184842a79eba81afb733e1f2807f7e9fa286c90a183e0ab7e2805b6b97

  • SHA512

    7693dca5c4378b2ac57fd5e71551ca7ac740c6192f364c1a2ae987bb4b8591d3167b9a79be8f7023525c3e2335d78286331a096a70946881a301065ce69486ba

  • SSDEEP

    3072:TyyL6e5KJOUM8GXLimIolLU+tzjYvOafr2x6ZSdp/s6LIxU:TrWe8oiGnVYdfeZU21

Malware Config

Extracted

Family

tofsee

C2

64.20.54.234

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

  • Tofsee

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c58a6b85fd1ecf61086b52f3a3794a1f_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\c58a6b85fd1ecf61086b52f3a3794a1f_JaffaCakes118.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:3956
    • C:\Users\Admin\AppData\Local\Temp\c58a6b85fd1ecf61086b52f3a3794a1f_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\c58a6b85fd1ecf61086b52f3a3794a1f_JaffaCakes118.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2408
      • C:\Users\Admin\lgxdta.exe
        "C:\Users\Admin\lgxdta.exe" /r
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3604
        • C:\Users\Admin\lgxdta.exe
          "C:\Users\Admin\lgxdta.exe" /r
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1088
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
            • System Location Discovery: System Language Discovery
            PID:3064
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3064 -s 320
              6⤵
              • Program crash
              PID:2792
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1306.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1768
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3064 -ip 3064
    1⤵
      PID:3068

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\1306.bat

      Filesize

      117B

      MD5

      a25a0f78cb3d73ef5c90e05882c493ee

      SHA1

      42561ddfcdc4a96c6e70cdd23a05e9a69ad44a5d

      SHA256

      2e17919ff27dd4793124cfad08c1f31db7f664339a2ba6d17fda22dad67f59eb

      SHA512

      395364e9bc052eac8828e33b79acec1c2ee9e47ebaa599d021269dd0b41007976da531e9922e7fb60a156b5e1547f3c501fc0c2f48dcaa7f6c1da95c899591a3

    • C:\Users\Admin\lgxdta.exe

      Filesize

      170KB

      MD5

      c58a6b85fd1ecf61086b52f3a3794a1f

      SHA1

      ab2fcc8ed5ee1d7efdfc808a8caaf54fae5b8f5f

      SHA256

      a96551184842a79eba81afb733e1f2807f7e9fa286c90a183e0ab7e2805b6b97

      SHA512

      7693dca5c4378b2ac57fd5e71551ca7ac740c6192f364c1a2ae987bb4b8591d3167b9a79be8f7023525c3e2335d78286331a096a70946881a301065ce69486ba

    • memory/1088-12-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

    • memory/2408-0-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

    • memory/2408-2-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

    • memory/2408-24-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

    • memory/3064-20-0x00000000003E0000-0x00000000003F0000-memory.dmp

      Filesize

      64KB

    • memory/3064-13-0x00000000003E0000-0x00000000003F0000-memory.dmp

      Filesize

      64KB

    • memory/3064-28-0x0000000000780000-0x0000000000781000-memory.dmp

      Filesize

      4KB

    • memory/3064-27-0x00000000003E0000-0x00000000003F0000-memory.dmp

      Filesize

      64KB

    • memory/3064-29-0x00000000003E0000-0x00000000003F0000-memory.dmp

      Filesize

      64KB

    • memory/3064-30-0x00000000003E0000-0x00000000003F0000-memory.dmp

      Filesize

      64KB