Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    15/10/2026, 04:10

General

  • Target
    jaffacakes118_Backdoor.Win32.DarkKomet.aagt.exe
  • Size 278KB
  • Sample261015-ernlfsdx2j
  • SHA256 d8f05d8442864e99810b1705ef7a2346bc54857792bfc5dd2bc6673aff51791f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • darkcomet

Botnet
  • Guest16

C2
  • testim123123.ddns.net:1604

Mutex
  • DC_MUTEX-BAELG0Q

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    LBi81wYjsDo8

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • Family: 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 3 TTPs 6 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 4 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • UPX packed file 22 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • System policy modification 1 TTPs 6 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DarkKomet.aagt.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DarkKomet.aagt.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DarkKomet.aagt.exe" +s +h
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3424
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DarkKomet.aagt.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:4136
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5036
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2304
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2980
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:3664
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
          PID:4224
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe"
          3⤵
            PID:2284
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            3⤵
            • System Location Discovery: System Language Discovery
            PID:3348
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        1⤵
        • Modifies firewall policy service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Windows security modification
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • System policy modification
        PID:3076

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            msdcsc.exe

            • Path C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            • Size 278KB
            • SHA256 d8f05d8442864e99810b1705ef7a2346bc54857792bfc5dd2bc6673aff51791f
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/2980-3-0x0000000000A20000-0x0000000000A21000-memory.dmp

            memory/3076-7-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3076-10-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3348-8-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

            memory/3664-16-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-18-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-28-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-27-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-26-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-14-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-15-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-25-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-17-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-6-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-19-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-20-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-21-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-22-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-23-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/3664-24-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/4268-0-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/4268-12-0x0000000000400000-0x00000000004C4000-memory.dmp

            memory/4268-1-0x00000000004C3000-0x00000000004C4000-memory.dmp

            memory/4268-2-0x0000000000400000-0x00000000004C4000-memory.dmp