Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 12:21

General

  • Target

    900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe

  • Size

    204KB

  • MD5

    1f57a9bb99804b8193ef503404bb7387

  • SHA1

    674710911110b4b45030b990dabb3c45fd095b3f

  • SHA256

    900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7

  • SHA512

    d93b6d24f3fdb267a0d43195bbba3494cb2734756e5e3090cea9e65c584d66ca5eb1842bda274f484a42dac89f2fb196a2ef83e9f8e70dad4ca4b1351c3acce7

  • SSDEEP

    3072:qfrB/GLaZdXUNc8iirJiM21K7uu+5Oiq08tJz5zoy887jImQpeBNMRDx/+cmH:qfrwclVORxv5z8kI1x2co

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe
    "C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ocpnhjin\
      2⤵
        PID:2840
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxqbbkll.exe" C:\Windows\SysWOW64\ocpnhjin\
        2⤵
          PID:1940
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ocpnhjin binPath= "C:\Windows\SysWOW64\ocpnhjin\uxqbbkll.exe /d\"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1468
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ocpnhjin "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2600
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ocpnhjin
          2⤵
          • Launches sc.exe
          PID:2680
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:1808
      • C:\Windows\SysWOW64\ocpnhjin\uxqbbkll.exe
        C:\Windows\SysWOW64\ocpnhjin\uxqbbkll.exe /d"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2596
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2728

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\uxqbbkll.exe

        Filesize

        14.1MB

        MD5

        3836fc9ce08f6693a7388ec397d3c8eb

        SHA1

        f5da3ea79a0544969053ea22784b0ab20ffb7e8b

        SHA256

        18fdcb0a49151eb6b9307a215dc95b9f00400acea71f2e8be4424dd74cbebcab

        SHA512

        884a745b331f6311ed58febb9d0a0dd13bdf9ac51c2c4cbfbb96c9028cff9fc0842603ef4087f1743667ff8fcb85549379628dae64631dec597239264e3207cf

      • memory/2220-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2220-4-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2220-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

        Filesize

        1024KB

      • memory/2220-18-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2596-16-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2596-9-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/2596-8-0x0000000000570000-0x0000000000670000-memory.dmp

        Filesize

        1024KB

      • memory/2728-38-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-40-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2728-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2728-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2728-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2728-22-0x0000000001900000-0x0000000001B0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2728-25-0x0000000001900000-0x0000000001B0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2728-26-0x0000000000170000-0x0000000000176000-memory.dmp

        Filesize

        24KB

      • memory/2728-29-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-32-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-33-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2728-37-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-36-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-41-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-42-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2728-39-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-46-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-45-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-48-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-49-0x0000000000190000-0x0000000000195000-memory.dmp

        Filesize

        20KB

      • memory/2728-47-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-44-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-43-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-35-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-34-0x0000000000180000-0x0000000000190000-memory.dmp

        Filesize

        64KB

      • memory/2728-52-0x0000000000190000-0x0000000000195000-memory.dmp

        Filesize

        20KB

      • memory/2728-53-0x00000000059C0000-0x0000000005DCB000-memory.dmp

        Filesize

        4.0MB

      • memory/2728-56-0x00000000059C0000-0x0000000005DCB000-memory.dmp

        Filesize

        4.0MB

      • memory/2728-57-0x00000000001E0000-0x00000000001E7000-memory.dmp

        Filesize

        28KB

      • memory/2728-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB