Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    25/08/2026, 08:29

General

  • Target
    e97c9b1fdac4218fba9c7a15d5a9c29525b7ad927c90502e2615a1b43db095bc.exe
  • Size 6.7MB
  • Sample260825-kdk63ayfpc
  • SHA256 e97c9b1fdac4218fba9c7a15d5a9c29525b7ad927c90502e2615a1b43db095bc
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Lunam

    Lunam is a Windows trojan written in Visual Basic.

  • Detects Lunam 9 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 3 IoCs
  • Modifies visibility of hidden/system files in Explorer 2 TTPs 3 IoCs
  • Adds policy Run key to start application 2 TTPs 6 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 6 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 3 IoCs
  • UPX packed file 18 IoCs

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

  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 3 IoCs

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

  • System Location Discovery: System Language Discovery 1 TTPs 22 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
  • Modifies registry key 1 TTPs 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e97c9b1fdac4218fba9c7a15d5a9c29525b7ad927c90502e2615a1b43db095bc.exe
    "C:\Users\Admin\AppData\Local\Temp\e97c9b1fdac4218fba9c7a15d5a9c29525b7ad927c90502e2615a1b43db095bc.exe"
    1⤵
    • Modifies visibility of file extensions in Explorer
    • Modifies visibility of hidden/system files in Explorer
    • Adds Run key to start application
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\SysWOW64\REG.exe
      REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
      2⤵
      • Impair Defenses: Safe Mode Boot
      • System Location Discovery: System Language Discovery
      • Modifies registry key
      PID:1020
    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      C:\Users\Admin\AppData\Local\Temp\avscan.exe
      2⤵
      • Modifies visibility of file extensions in Explorer
      • Modifies visibility of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:520
      • C:\Users\Admin\AppData\Local\Temp\avscan.exe
        C:\Users\Admin\AppData\Local\Temp\avscan.exe
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:1440
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
        3⤵
        • Checks computer location settings
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:736
        • C:\windows\hosts.exe
          C:\windows\hosts.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:4900
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
          4⤵
          • Adds policy Run key to start application
          • Executes a VBScript file via the Windows Script Host.
          • System Location Discovery: System Language Discovery
          PID:3432
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4136
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:700
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4408
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4548
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
      2⤵
      • Checks computer location settings
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\windows\hosts.exe
        C:\windows\hosts.exe
        3⤵
        • Modifies visibility of file extensions in Explorer
        • Modifies visibility of hidden/system files in Explorer
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4524
        • C:\Users\Admin\AppData\Local\Temp\avscan.exe
          C:\Users\Admin\AppData\Local\Temp\avscan.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:2812
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
          4⤵
          • Checks computer location settings
          • Executes a command shell one-liner
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:208
          • C:\windows\hosts.exe
            C:\windows\hosts.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:3052
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
            5⤵
            • Adds policy Run key to start application
            • Executes a VBScript file via the Windows Script Host.
            • System Location Discovery: System Language Discovery
            PID:4036
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:3776
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2436
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4900
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:368
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
        3⤵
        • Adds policy Run key to start application
        • Executes a VBScript file via the Windows Script Host.
        • System Location Discovery: System Language Discovery
        PID:3748
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4232

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          avscan.exe

          • Path C:\Users\Admin\AppData\Local\Temp\avscan.exe
          • Size 6.7MB
          • SHA256 bf1d21192f0cd8c633a49824609cd8e6a6fc0b9d64516f147176b2d285180d5f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 13.5MB
          • SHA256 9011bb22b02209742859ccbd12b5272a5d80d4e37127eb4820dca558b0b35205
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 20.2MB
          • SHA256 34c6d3dc0ae288cff4bb56f927376e528648e92a25a51c83f18784e098ed9940
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 27.0MB
          • SHA256 ad5a899806d0394e48977c0d0a3c530cb8b5d77266637e199e40db36b9e52306
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 33.7MB
          • SHA256 b2c2c2c44d5c661f674a349e1a756f513a4de00bfad9a5892ea4ac34aa0a5f1e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 40.5MB
          • SHA256 4557def4df28d13f475ed5ba5cbb57e7c8ad944ff79986380cc1c641bb78a3c5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 47.2MB
          • SHA256 a85ac7182bc14f6f9c72fac712a00f7d87bb81ce4b7360cc5aa79cb30af44090
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4348_576495791\CRX_INSTALL\128.png
          • Size 54.0MB
          • SHA256 44b7f7a7ba11673eea65d63372bf57dee5f55b2b87907b43964497d9a777c166
          • MD5 SHA1 SHA512 SSDEEP TLSH

          W_X_C.vbs

          • Path C:\Windows\W_X_C.vbs
          • Size 195B
          • SHA256 179ba010908d33b071f724cf63498ae72f0ba81c24ac9e597481ddaaeb777053
          • MD5 SHA1 SHA512 TLSH

          hosts.exe

          • Path C:\Windows\hosts.exe
          • Size 6.7MB
          • SHA256 b1f791ac7852cfc1565bec988e714e7a41078c5f860daf8d98f2cc44f58f5f6b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          W_X_C.bat

          • Path \??\c:\windows\W_X_C.bat
          • Size 336B
          • SHA256 d2150b9e5a4ce55e140f0ca91c4e300715d42095c8fddf58c77037cdd2cfaf78
          • MD5 SHA1 SHA512 TLSH

          memory/520-44-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/520-11-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1440-21-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1948-0-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1948-22-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/2812-39-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/3052-43-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4524-45-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4900-36-0x0000000000400000-0x000000000042E000-memory.dmp