Analysis

  • max time kernel
    150s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2022, 09:19

General

  • Target
    ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe
  • Size 647KB
  • Sample221011-lae2bafgd2
  • SHA256 ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7
  • MD5 SHA1 SHA512 SSDEEP

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 6 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe
    "C:\Users\Admin\AppData\Local\Temp\ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1920
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1904
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 4 && del "C:\Users\Admin\AppData\Local\Temp\ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1952
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 4
        3⤵
        • Runs ping.exe
        PID:976
    • C:\ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Windows security bypass
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:112
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Windows security bypass
        • Adds Run key to start application
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1312

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        msdcsc.exe

        • Path C:\ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe
        • Size 647KB
        • SHA256 ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7
        • MD5 SHA1 SHA512 SSDEEP

        msdcsc.exe

        • Path C:\ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe
        • Size 647KB
        • SHA256 ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7
        • MD5 SHA1 SHA512 SSDEEP

        msdcsc.exe

        • Path \ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe
        • Size 647KB
        • SHA256 ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7
        • MD5 SHA1 SHA512 SSDEEP

        msdcsc.exe

        • Path \ProgramData\Microsoft\Windows\Start Menu\msdcsc.exe
        • Size 647KB
        • SHA256 ba13bf6c4152c842f61ec6ae3db02bad97fd3a99b8b9a912673bf793d48955f7
        • MD5 SHA1 SHA512 SSDEEP

        memory/1492-54-0x0000000076121000-0x0000000076123000-memory.dmp