Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    26/08/2026, 08:58

General

  • Target
    59bb163bdf0b54c63db725c30b0e307781a70d4539e4c8b6e845d485d4f154b6.exe
  • Size 8.1MB
  • Sample260826-kxfexsce48
  • SHA256 59bb163bdf0b54c63db725c30b0e307781a70d4539e4c8b6e845d485d4f154b6
  • 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\59bb163bdf0b54c63db725c30b0e307781a70d4539e4c8b6e845d485d4f154b6.exe
    "C:\Users\Admin\AppData\Local\Temp\59bb163bdf0b54c63db725c30b0e307781a70d4539e4c8b6e845d485d4f154b6.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:4336
    • 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:624
    • 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:1504
      • 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:4128
      • 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:556
        • C:\windows\hosts.exe
          C:\windows\hosts.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:3920
        • 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:2288
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4512
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:832
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3148
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4040
    • 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:1712
      • 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:4036
        • 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:1188
        • 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:4456
          • C:\windows\hosts.exe
            C:\windows\hosts.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:312
          • 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:1016
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4228
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:1128
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4372
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2932
      • 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:2824
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:5092

    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 8.1MB
          • SHA256 ebc7f918f7b75c3076bf3e75eaa921ad96f293e58312e06491b1fbc8f7061ab8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 16.2MB
          • SHA256 ef935bafa2d45292277a186ad8c50b62d66b89948414ddf32e0347764e7b19ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 24.3MB
          • SHA256 a600b3cc8fa89a8816ca666185fbd188f54d329e2afcba8e4ca1f6e530f9d426
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 32.4MB
          • SHA256 099e64babf787258c9ca04e3554e9dc135838d2f7d3b2a37666e17d193acb5fd
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 40.5MB
          • SHA256 99b0ae757e0a947c83e51e888b013073295aeb08f35026d71820a06819e5d8ae
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 48.6MB
          • SHA256 fc5d9fa5a5052428feff22bd1962c6cc872ff9f3b70fb584d716f3e3f4384de7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir3988_1880305382\CRX_INSTALL\128.png
          • Size 56.7MB
          • SHA256 735c85d916adb539f18e0f46387b3639ba0a94a2b8c453e6d70c53838801a42d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          W_X_C.vbs

          • Path C:\Windows\W_X_C.vbs
          • Size 195B
          • SHA256 6e1f1a5cf696df3d046d9f41dc8d79dbe266b6c8d84cb4e6527088dc5e2f3029
          • MD5 SHA1 SHA512 TLSH

          hosts.exe

          • Path C:\Windows\hosts.exe
          • Size 8.1MB
          • SHA256 7ce0fdfa4c303cc91470602308ab8af408baddaabd299d55d06f161a35bc2231
          • 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/312-44-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1188-40-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1504-45-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/3920-38-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4036-46-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4128-21-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4128-16-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4336-0-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/4336-22-0x0000000000400000-0x000000000042E000-memory.dmp