Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2022, 13:29

General

  • Target

    617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652.exe

  • Size

    666KB

  • MD5

    90beb0c7bfc299c7461ac760e7e3c603

  • SHA1

    6a3e7386a9463dcdb6b0ac5d72d0cd25dc1bd610

  • SHA256

    617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652

  • SHA512

    7594acb8c06a93648bc3f6c4655240e2e4acf6ca911d9718cbddfa347bb07a14888c53efc1f81316fb588787ccf2ee85a0a797b7ddc53aca2d0fc1ee07f91671

  • SSDEEP

    12288:hpwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/6R:jwAcu99lPzvxP+Bsz2XjWTRMQckkIXn4

Malware Config

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652.exe
    "C:\Users\Admin\AppData\Local\Temp\617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops file in Drivers directory
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Checks processor information in registry
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3368
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\SysWOW64\explorer.exe"
      2⤵
        PID:1552
      • C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
        "C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe"
        2⤵
        • Modifies firewall policy service
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Adds Run key to start application
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2376
        • C:\Windows\SysWOW64\explorer.exe
          "C:\Windows\SysWOW64\explorer.exe"
          3⤵
            PID:2968
        • C:\Windows\SysWOW64\ping.exe
          ping 127.0.0.1 -n 5 > NUL del "C:\Users\Admin\AppData\Local\Temp\617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652.exe"
          2⤵
          • Runs ping.exe
          PID:4072

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe

              Filesize

              666KB

              MD5

              90beb0c7bfc299c7461ac760e7e3c603

              SHA1

              6a3e7386a9463dcdb6b0ac5d72d0cd25dc1bd610

              SHA256

              617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652

              SHA512

              7594acb8c06a93648bc3f6c4655240e2e4acf6ca911d9718cbddfa347bb07a14888c53efc1f81316fb588787ccf2ee85a0a797b7ddc53aca2d0fc1ee07f91671

            • C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe

              Filesize

              666KB

              MD5

              90beb0c7bfc299c7461ac760e7e3c603

              SHA1

              6a3e7386a9463dcdb6b0ac5d72d0cd25dc1bd610

              SHA256

              617f3805bc495e2bf705d44cdbb6d8a6fd79bf5e3b552e0f6fb6143bf7bb8652

              SHA512

              7594acb8c06a93648bc3f6c4655240e2e4acf6ca911d9718cbddfa347bb07a14888c53efc1f81316fb588787ccf2ee85a0a797b7ddc53aca2d0fc1ee07f91671