Analysis

  • max time kernel
    150s
  • max time network
    72s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    24/06/2020, 15:06

General

  • Target
    c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe
  • Size 932KB
  • Sample200624-v7pg8gxvbx
  • SHA256 c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • darkcomet

Botnet
  • Test Server

C2
  • 127.0.0.1:1604

Mutex
  • DC_MUTEX-4XKPULH

Attributes
  • gencode

    LBSgYfRa7QDe

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

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

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 13 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe
    "C:\Users\Admin\AppData\Local\Temp\c2c82ee2700333d677bee2937f99b1e5657f339e23c27b5b7d2a397b672fffd9.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1032
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V chrome.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\chrome.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1204
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V chrome.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\chrome.exe
        3⤵
        • Adds Run key to start application
        • Modifies registry key
        PID:1364
    • C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
      C:\Users\Admin\AppData\Local\Temp\taskmgr.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1304
      • C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE
        "C:\Users\Admin\AppData\Local\Temp\STEWART LOGO.EXE"
        3⤵
        • Modifies system executable filetype association
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:1548
        • C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
          "C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1224
          • C:\Windows\svchost.com
            "C:\Windows\svchost.com" "C:\Windows\System32\cmd.exe" /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Drops file in Program Files directory
            • Drops file in Windows directory
            • Suspicious use of WriteProcessMemory
            PID:1608
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\System32\cmd.exe /C REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1660
              • C:\Windows\SysWOW64\reg.exe
                REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /V facebook.exe /T REG_SZ /D C:\Users\Admin\AppData\Local\Temp\facebook.exe
                7⤵
                • Adds Run key to start application
                • Modifies registry key
                PID:1944
          • C:\Users\Admin\AppData\Local\Temp\notepad.exe
            C:\Users\Admin\AppData\Local\Temp\notepad.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:1892
          • C:\Windows\svchost.com
            "C:\Windows\svchost.com" "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Drops file in Windows directory
            • Suspicious use of WriteProcessMemory
            PID:564
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\System32\cmd.exe /C choice /C Y /N /D Y /T 3 & Del C:\Users\Admin\AppData\Local\Temp\3582-490\STEWART LOGO.EXE
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:568
              • C:\Windows\SysWOW64\choice.exe
                choice /C Y /N /D Y /T 3
                7⤵
                  PID:1376
    • C:\Windows\SysWOW64\DllHost.exe
      C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
      1⤵
      • Suspicious use of FindShellTrayWindow
      PID:276

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1304-3-0x0000000000400000-0x00000000004E4000-memory.dmp

          memory/1304-6-0x0000000000400000-0x00000000004E4000-memory.dmp

          memory/1892-32-0x0000000000400000-0x00000000004B2000-memory.dmp

          memory/1892-35-0x0000000000400000-0x00000000004B2000-memory.dmp