Analysis

  • user interaction
    yes
  • max time kernel
    58s
  • max time network
    52s
  • 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, 04:29

General

  • Target
    Private1.exe
  • Size 2.6MB
  • Sample260826-e4kekascja
  • SHA256 3baa87863d025aa1c115c0ba7fe53157f3aae0e6696aa972ea52fc3ab587eafe
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 6 IoCs
  • Checks BIOS information in registry 2 TTPs 12 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Executes dropped EXE 6 IoCs
  • Themida packer 19 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Drops file in Windows directory 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 35 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Private1.exe
    "C:\Users\Admin\AppData\Local\Temp\Private1.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4216
    • \??\c:\users\admin\appdata\local\temp\private1.exe 
      c:\users\admin\appdata\local\temp\private1.exe 
      2⤵
      • Executes dropped EXE
      PID:4404
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2856
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visibility of hidden/system files in Explorer
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in System32 directory
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2124
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1944
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visibility of hidden/system files in Explorer
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Adds Run key to start application
            • Checks whether UAC is enabled
            • Drops file in System32 directory
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:5104
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Identifies VirtualBox via ACPI registry values (likely anti-VM)
              • Checks BIOS information in registry
              • Executes dropped EXE
              • Checks whether UAC is enabled
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:3456
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:1112
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /7
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2764

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          private1.exe 

          • Path C:\Users\Admin\AppData\Local\Temp\private1.exe 
          • Size 47KB
          • SHA256 9549d30adaa38d351a4b2adaf73e8ced73831228f0c557450ea88711e49c8c21
          • MD5 SHA1 SHA512 SSDEEP TLSH

          explorer.exe

          • Path C:\Windows\Resources\Themes\explorer.exe
          • Size 2.6MB
          • SHA256 b38d25519526ebc26bea0da2c4c36711511d1721d0ca9d87809082abd6457122
          • MD5 SHA1 SHA512 SSDEEP TLSH

          icsys.icn.exe

          • Path C:\Windows\Resources\Themes\icsys.icn.exe
          • Size 2.6MB
          • SHA256 2320b67561eeaa15c0df8ed5853445b13513f178f88ad5c2854310997d0f9f92
          • MD5 SHA1 SHA512 SSDEEP TLSH

          svchost.exe

          • Path C:\Windows\Resources\svchost.exe
          • Size 2.6MB
          • SHA256 f97f63ed9029fdf17feddbf3cef69a20d9798ab975435eede2e760209cee83b7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          spoolsv.exe

          • Path \??\c:\windows\resources\spoolsv.exe
          • Size 2.6MB
          • SHA256 d9fa8d2dcd8f059818d42941f8246ed54b8bbbd531caf161872550bf5de8df0f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1944-53-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/1944-32-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/2124-56-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/2124-21-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/2764-66-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-73-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-70-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-71-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-72-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-74-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-75-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-76-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-65-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2764-64-0x00000212681E0000-0x00000212681E1000-memory.dmp

          memory/2856-11-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/2856-55-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/3456-51-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/3456-46-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/4216-0-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/4216-23-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/5104-61-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/5104-59-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/5104-58-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/5104-41-0x0000000000400000-0x0000000000A16000-memory.dmp

          memory/5104-80-0x0000000000400000-0x0000000000A16000-memory.dmp