Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2024, 21:25

General

  • Target

    6b83823e49a39f298c15c3ff547fa406.exe

  • Size

    746KB

  • MD5

    6b83823e49a39f298c15c3ff547fa406

  • SHA1

    87a6d44cfe44f3d452465ca8512b1a06041d92dd

  • SHA256

    3f19fa1892210bd294995f2a1a35487161f1dc17ec665565cc30353a7c4f3966

  • SHA512

    7aac8200aab701757e8bb05e2d2b49933f263e406f8782a8e9a94ba81a5763c088bee70a69db7720c6e1474ea1e1f6c470d00dd3e8f28449c921e0757dc34c99

  • SSDEEP

    12288:B6A84PaHhfD/tV9sj5NKR0pau9XGyu2qBVGLQyTPfh3svv:kAmBpVKHu0Mu9Xo20VGLVP5cvv

Malware Config

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6b83823e49a39f298c15c3ff547fa406.exe
    "C:\Users\Admin\AppData\Local\Temp\6b83823e49a39f298c15c3ff547fa406.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Windupdt\winupdate.exe
      "C:\Windupdt\winupdate.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:4476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Users\Admin\AppData\Local\Temp\6b83823e49a39f298c15c3ff547fa406.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1828
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 5
        3⤵
        • Runs ping.exe
        PID:632

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Windupdt\winupdate.exe

          Filesize

          746KB

          MD5

          6b83823e49a39f298c15c3ff547fa406

          SHA1

          87a6d44cfe44f3d452465ca8512b1a06041d92dd

          SHA256

          3f19fa1892210bd294995f2a1a35487161f1dc17ec665565cc30353a7c4f3966

          SHA512

          7aac8200aab701757e8bb05e2d2b49933f263e406f8782a8e9a94ba81a5763c088bee70a69db7720c6e1474ea1e1f6c470d00dd3e8f28449c921e0757dc34c99

        • C:\Windupdt\winupdate.exe

          Filesize

          569KB

          MD5

          bf1de2ad20fb031ab0eb6e804dd78808

          SHA1

          54e9be2977fdc096fafeead48b01e7fa9be02521

          SHA256

          5670bfc3cb11e85452ff8a1ab9ddf9ec943734c567c38c628d47c1a3adb16157

          SHA512

          1c9455391a28149e173e7f0b3a43fedd41e05cc4441d2779b0862ab54c4d8b3d3dc4817a9f083ad0c48b25983b1a5dc36fa972db6578fd17228effe016008e11

        • memory/1932-0-0x0000000002420000-0x0000000002421000-memory.dmp

          Filesize

          4KB

        • memory/1932-10-0x0000000000400000-0x00000000004CC000-memory.dmp

          Filesize

          816KB

        • memory/4476-11-0x0000000002180000-0x0000000002181000-memory.dmp

          Filesize

          4KB

        • memory/4476-12-0x0000000000400000-0x00000000004CC000-memory.dmp

          Filesize

          816KB

        • memory/4476-13-0x0000000000400000-0x00000000004CC000-memory.dmp

          Filesize

          816KB