Analysis

  • max time kernel
    143s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/07/2024, 01:47

General

  • Target
    55add9edfc6554324406ec3c3f6a28ba_JaffaCakes118.exe
  • Size 1.5MB
  • Sample240718-b7htcszbpj
  • SHA256 684036adf28f3fd61de6309f04c081158f56daa810742ca01b1ff132dcddc579
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • darkcomet

Botnet
  • Guest16

C2
  • darkcomet2013.no-ip.biz:1500

  • 192.168.1.71:1500

Mutex
  • DC_MUTEX-0CL16WC

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    afvedzjJwqrq

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Extracted

Family
  • darkcomet

Botnet
  • Mise a j

C2
  • city972.no-ip.biz:1550

Mutex
  • DC_MUTEX-R6CBWTY

Attributes
  • gencode

    mhm0aGqb433o

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55add9edfc6554324406ec3c3f6a28ba_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\55add9edfc6554324406ec3c3f6a28ba_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4696
    • C:\Users\Admin\AppData\Local\Temp\JUUU.EXE
      "C:\Users\Admin\AppData\Local\Temp\JUUU.EXE"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4036
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3156
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\VSCover.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\VSCover.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2484
    • C:\Users\Admin\AppData\Local\Temp\PROTECTED.EXE
      "C:\Users\Admin\AppData\Local\Temp\PROTECTED.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2704
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        3⤵
        • Modifies WinLogon for persistence
        • Adds Run key to start application
        • Drops file in System32 directory
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1236
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3884
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:8
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2408
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:2712
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:4624
          • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
            "C:\Windows\system32\MSDCSC\msdcsc.exe"
            4⤵
            • Executes dropped EXE
            PID:2420

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          JUUU.EXE

          • Path C:\Users\Admin\AppData\Local\Temp\JUUU.EXE
          • Size 696KB
          • SHA256 95600610d4b35d15b1c2b03ca2e23f35f4c9d3fd59d411ba13ef46242c7c4be5
          • MD5 SHA1 SHA512 SSDEEP

          PROTECTED.EXE

          • Path C:\Users\Admin\AppData\Local\Temp\PROTECTED.EXE
          • Size 738KB
          • SHA256 07d906ee9b0624eaed994fb55bfc114d01182fcb3abb4fee6e92e018928ef368
          • MD5 SHA1 SHA512 SSDEEP

          VSCover.exe

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\VSCover.exe
          • Size 9KB
          • SHA256 be262699cd942a22fc312fd0b9f9342f918dd12a1a3eed021f6638cd001332f9
          • MD5 SHA1 SHA512 SSDEEP

          msdcsc.exe

          • Path C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
          • Size 57KB
          • SHA256 7fd4f35aff4a0d4bfaae3a5dfb14b94934276df0e96d1a417a8f3693915e72c8
          • MD5 SHA1 SHA512 SSDEEP

          memory/1236-33-0x0000000000400000-0x00000000004BD000-memory.dmp

          memory/1236-31-0x0000000000400000-0x00000000004BD000-memory.dmp

          memory/1236-37-0x0000000000400000-0x00000000004BD000-memory.dmp

          memory/2704-25-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/2704-30-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/2704-38-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/3156-36-0x0000000000400000-0x00000000004B0000-memory.dmp

          memory/3156-34-0x0000000000400000-0x00000000004B0000-memory.dmp

          memory/3156-35-0x0000000000400000-0x00000000004B0000-memory.dmp

          memory/3156-43-0x0000000000400000-0x00000000004B0000-memory.dmp

          memory/3156-42-0x0000000000400000-0x00000000004B0000-memory.dmp

          memory/4036-24-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/4036-23-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/4036-22-0x0000000073832000-0x0000000073833000-memory.dmp

          memory/4036-113-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/4036-114-0x0000000073832000-0x0000000073833000-memory.dmp

          memory/4036-115-0x0000000073830000-0x0000000073DE1000-memory.dmp

          memory/4624-44-0x0000000000AB0000-0x0000000000AB1000-memory.dmp