Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    24/08/2026, 15:01

General

  • Target
    5a217d507ab08bdd24b3d6b3a94e95392b7ab9b316776d96883a669042c26d84.exe
  • Size 4.7MB
  • Sample260824-sd7dasdh83
  • SHA256 5a217d507ab08bdd24b3d6b3a94e95392b7ab9b316776d96883a669042c26d84
  • 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\5a217d507ab08bdd24b3d6b3a94e95392b7ab9b316776d96883a669042c26d84.exe
    "C:\Users\Admin\AppData\Local\Temp\5a217d507ab08bdd24b3d6b3a94e95392b7ab9b316776d96883a669042c26d84.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:1964
    • 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:3748
    • 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:3580
      • 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:1228
      • 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:4244
        • C:\windows\hosts.exe
          C:\windows\hosts.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:5084
        • 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:3228
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:1180
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:4736
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3548
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:1644
    • 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:1640
      • 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:680
        • 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:548
        • 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:552
          • C:\windows\hosts.exe
            C:\windows\hosts.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:2124
          • 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:4472
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4740
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:4756
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:1560
        • C:\Windows\SysWOW64\REG.exe
          REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2172
      • 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:2608
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:5096

    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 4.7MB
          • SHA256 144ad8f0c90ab5c1594da2b41e687a8db1d25c8dffcfcbe25a49c1af13dcecc7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 9.4MB
          • SHA256 fa8408ede5160149accc38fc2284c47532418afe4fffcac41b6706680f330f56
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 14.2MB
          • SHA256 e8c152ef78e62c773c445f7f564895d9a58e00d7bf953cc731633723747945da
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 18.9MB
          • SHA256 f93f8f98f401ac4c983cb54a63101839a324f1062a3c545dbbcebaf7ad82e054
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 23.6MB
          • SHA256 2f0d76fa66a31a5b6425e0958943f4f2d702e2d93abfa214ee489fe773d42859
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 28.3MB
          • SHA256 6a70bcd7f55703d15e606b6ee428addf41d5b0747f5bb389b937e38c17478b14
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 33.1MB
          • SHA256 53b0c43e28fdcaf445930d3d169e53e50a3c4f414f0fbda82333fab903e54c67
          • MD5 SHA1 SHA512 SSDEEP TLSH

          128.png

          • Path C:\Users\Admin\AppData\Local\Temp\scoped_dir1920_2001913635\CRX_INSTALL\128.png
          • Size 37.8MB
          • SHA256 3643fa5c276b6b3bbe42431544837dd703ecc3f43b8e1e0690c65278bfb3e036
          • MD5 SHA1 SHA512 SSDEEP TLSH

          W_X_C.vbs

          • Path C:\Windows\W_X_C.vbs
          • Size 195B
          • SHA256 4203dc4f2e3217346a617f2120ee625c5e2449ed925e45f5b5fe9927e824059d
          • MD5 SHA1 SHA512 TLSH

          hosts.exe

          • Path C:\Windows\hosts.exe
          • Size 4.7MB
          • SHA256 e51dbe8460ba801a88296ed52ac34c591dcda9e1b08c1e64fe00a9391f6b28a2
          • 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/548-39-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/680-45-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1228-21-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1228-16-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1964-22-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/1964-0-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/2124-43-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/3580-44-0x0000000000400000-0x000000000042E000-memory.dmp

          memory/5084-34-0x0000000000400000-0x000000000042E000-memory.dmp