Analysis

  • max time kernel
    149s
  • max time network
    120s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/10/2026, 09:36

General

  • Target
    jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe
  • Size 403KB
  • Sample261006-lk3kcsvgka
  • SHA256 54ba3bf68c49926c8890aec36971bbb44945079024ab0fdd07f46b052eb25703
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: ProRat

    ProRat is a Windows RAT written in C++.

  • Detects ProRat payload 17 IoCs
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Adds policy Run key to start application 2 TTPs 4 IoCs
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 5 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • A potential corporate email address has been identified in the URL 1 IoCs
  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 IoCs
  • Modifies WinLogon 2 TTPs 2 IoCs
  • Drops file in System32 directory 10 IoCs
  • UPX packed file 19 IoCs

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

  • Drops file in Windows directory 7 IoCs
  • 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 10 IoCs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1844
    • C:\Windows\SysWOW64\lncom.exe
      "C:\Windows\system32\lncom.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Adds policy Run key to start application
      • Boot or Logon Autostart Execution: Active Setup
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies WinLogon
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4584
      • C:\Windows\SysWOW64\fservice.exe
        C:\Windows\system32\fservice.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1996
        • C:\Windows\services.exe
          C:\Windows\services.exe -XP
          4⤵
          • Modifies WinLogon for persistence
          • Adds policy Run key to start application
          • Boot or Logon Autostart Execution: Active Setup
          • A potential corporate email address has been identified in the URL
          • Executes dropped EXE
          • Loads dropped DLL
          • Modifies WinLogon
          • Drops file in System32 directory
          • Drops file in Windows directory
          • Reads the TCP/IP host and domain name from the registry
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1296
          • C:\Windows\SysWOW64\NET.exe
            NET STOP srservice
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:3292
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 STOP srservice
              6⤵
              • System Location Discovery: System Language Discovery
              PID:2876
          • C:\Windows\SysWOW64\NET.exe
            NET STOP navapsvc
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:4004
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 STOP navapsvc
              6⤵
              • System Location Discovery: System Language Discovery
              PID:6096
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Windows\SysWOW64\lncom.exe.bat
        3⤵
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        PID:1540
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE.bat
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:2036
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:3984

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          JAFFAC~1.EXE.bat

          • Path C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE.bat
          • Size 133B
          • SHA256 cf0513e7b760b2838477996e6ae09781c98f32a2d4791471f6b82b1d77cd5ee4
          • MD5 SHA1 SHA512 TLSH

          lncom.exe

          • Path C:\Windows\SysWOW64\lncom.exe
          • Size 342KB
          • SHA256 7e14e8676889e9246134fed41dd7e02a6a3bb279469b91dce7ec8038e535b02a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          lncom.exe.bat

          • Path C:\Windows\SysWOW64\lncom.exe.bat
          • Size 99B
          • SHA256 3a57d154715459926a51a9e3925687c0c78ec9c88bc39c303b5b93385d34d67e
          • MD5 SHA1 SHA512 TLSH

          reginv.dll

          • Path C:\Windows\SysWOW64\reginv.dll
          • Size 36KB
          • SHA256 c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          winkey.dll

          • Path C:\Windows\SysWOW64\winkey.dll
          • Size 13KB
          • SHA256 45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1296-45-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-60-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-25-0x0000000010000000-0x000000001000B000-memory.dmp

          memory/1296-72-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-70-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-68-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-66-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-44-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-46-0x0000000010000000-0x000000001000B000-memory.dmp

          memory/1296-64-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-47-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-49-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-51-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-53-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-55-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-58-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1296-62-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/1844-16-0x0000000000400000-0x0000000000404000-memory.dmp

          memory/1996-20-0x0000000000C30000-0x0000000000C31000-memory.dmp

          memory/1996-40-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/4584-15-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/4584-42-0x0000000000400000-0x00000000005FC000-memory.dmp

          memory/4584-17-0x0000000000C30000-0x0000000000C31000-memory.dmp