Analysis

  • max time kernel
    149s
  • max time network
    150s
  • 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, 12:19

General

  • Target
    49e83c798fad351ed0a85e1412c87db2f30d6784a8b4519254c1884b13ee6395.exe
  • Size 8.0MB
  • Sample260825-phlevaysgs
  • SHA256 49e83c798fad351ed0a85e1412c87db2f30d6784a8b4519254c1884b13ee6395
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Lunam

    Lunam is a Windows trojan written in Visual Basic.

  • Detects Lunam 8 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 17 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\49e83c798fad351ed0a85e1412c87db2f30d6784a8b4519254c1884b13ee6395.exe
    "C:\Users\Admin\AppData\Local\Temp\49e83c798fad351ed0a85e1412c87db2f30d6784a8b4519254c1884b13ee6395.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:2372
    • 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:2108
    • 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:788
      • 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:4224
      • 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:1188
        • C:\windows\hosts.exe
          C:\windows\hosts.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:2236
        • 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:4928
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:1548
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3520
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:2564
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4612
    • 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:3808
      • 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:4420
        • 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:4704
        • 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:1752
          • C:\windows\hosts.exe
            C:\windows\hosts.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:412
          • 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:4828
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2816
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4928
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2200
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2836
      • 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:4176
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:912

    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 8.0MB
          • SHA256 9e006182879a56246f9112f2933d2b0a1d7c9e018ed5eac0108529a3285e3da8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 15.9MB
          • SHA256 1435caad2bc96d048f411692b4f4ddb5148005d08180c363692ac91c07533252
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 23.9MB
          • SHA256 0c8f59ef5b3cd2947e982244d566eb2cfcb4c50a9c4f453e88106d2fbed7dbb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 31.8MB
          • SHA256 c41bdec89d96158e74b631f702190aed5069c85feef373e69fcbb71268f78926
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 39.8MB
          • SHA256 4ef5813fd966f001c6d034858dceaa88bf160dcedda797577735f74ebb0ae097
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 47.8MB
          • SHA256 95f1f627872428b254e57e19fd3e14addc082b54a52c8d0f37e3f2f96ccae3e8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir4968_609822704\CRX_INSTALL\128.png
          • Size 55.7MB
          • SHA256 de86de507d3178dea53032139b18680299a8d5f373b7b12a84e56df3ac49fba7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          W_X_C.vbs

          • Path C:\Windows\W_X_C.vbs
          • Size 195B
          • SHA256 fcd4caa16972bd061f0f8c90cb83f5918268042675a610eb1ebc7a8772c0d1aa
          • MD5 SHA1 SHA512 TLSH

          hosts.exe

          • Path C:\Windows\hosts.exe
          • Size 8.0MB
          • SHA256 8e7b176b690e73774c00c9122f9de0b4e764e6aae8ed336d516a3d7a5e07e1da
          • 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/412-43-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/788-44-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/788-11-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/2236-36-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/2372-22-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/2372-0-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4224-21-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4420-45-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4704-39-0x0000000000400000-0x000000000042E000-memory.dmp