Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/07/2026, 06:01

General

  • Target
    WindowsUpdateAssistant.exe
  • Size 14.4MB
  • Sample260721-graqpshw2y
  • SHA256 5c71d7e640075a12c4990facff896720f344685adc8591975cdbe73a2617ca09
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 2 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs 8 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 60 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 6 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
    "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:908
    • C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
      "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe"
      2⤵
      • Modifies Windows Defender DisableAntiSpyware settings
      • Modifies Windows Defender Real-time Protection settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4904
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc query"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:2592
        • C:\Windows\system32\sc.exe
          sc query
          4⤵
          • Launches sc.exe
          PID:460
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "schtasks /create /tn "DisolatedWindowsUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe" /sc onlogon /rl highest /f"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4804
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "DisolatedWindowsUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe" /sc onlogon /rl highest /f
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:2104
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "cscript //nologo "C:\Windows\Temp\create_shortcut.vbs""
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4108
        • C:\Windows\system32\cscript.exe
          cscript //nologo "C:\Windows\Temp\create_shortcut.vbs"
          4⤵
          • Drops startup file
          • Executes a VBScript file via the Windows Script Host.
          PID:3516
  • C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
    C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5620
    • C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
      C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe
      2⤵
      • Modifies Windows Defender DisableAntiSpyware settings
      • Modifies Windows Defender Real-time Protection settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5084
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc query"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4500
        • C:\Windows\system32\sc.exe
          sc query
          4⤵
          • Launches sc.exe
          PID:2236
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "schtasks /create /tn "DisolatedWindowsUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe" /sc onlogon /rl highest /f"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:1504
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "DisolatedWindowsUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\WindowsUpdateAssistant.exe" /sc onlogon /rl highest /f
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:1288
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "cscript //nologo "C:\Windows\Temp\create_shortcut.vbs""
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:712
        • C:\Windows\system32\cscript.exe
          cscript //nologo "C:\Windows\Temp\create_shortcut.vbs"
          4⤵
          • Drops startup file
          • Executes a VBScript file via the Windows Script Host.
          PID:1728

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        _pkcs1_decode.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Cipher\_pkcs1_decode.pyd
        • Size 13KB
        • SHA256 320ca46655bae21c964515726183ab86069d55262671798287072d9ff6bd54bc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _raw_aes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Cipher\_raw_aes.pyd
        • Size 34KB
        • SHA256 520b343e44b5633bbc4fdcecc705a7f2eb6e55d082a1f3e4723ada9d7e5ea97d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _raw_aesni.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Cipher\_raw_aesni.pyd
        • Size 15KB
        • SHA256 3818873f50418cbecde58150e9bffff7372d2c2067fc0b96ffac9482dfddd603
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _SHA1.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Hash\_SHA1.pyd
        • Size 17KB
        • SHA256 8f80524247c830d9bb590d025e15ec34d7d337a16e5c4422e2da0448d06c88a6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _modexp.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Math\_modexp.pyd
        • Size 30KB
        • SHA256 fc122c8e0a1c236c2a0b20009ed710602545577ba34a9fafed71eb84e56a2e76
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _cpuid_c.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Util\_cpuid_c.pyd
        • Size 10KB
        • SHA256 2af984819d9b1f95132520901b355eb85aa24d5efc6fc5ae9e77252ed03b7f4b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _strxor.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\Crypto\Util\_strxor.pyd
        • Size 10KB
        • SHA256 c77f18f1f7a377bc388de0104abf4868d6f0c2ef7ef2b97b34d875cfc3040aac
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\VCRUNTIME140.dll
        • Size 117KB
        • SHA256 052ad6a20d375957e82aa6a3c441ea548d89be0981516ca7eb306e063d5027f4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VCRUNTIME140_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\VCRUNTIME140_1.dll
        • Size 48KB
        • SHA256 6a99bc0128e0c7d6cbbf615fcc26909565e17d4ca3451b97f8987f9c6acbc6c8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_bz2.pyd
        • Size 86KB
        • SHA256 ef5277eb670219274e7d1e92190ddf7f4bb94d4922ca1c1a12efadfd2c4c66f6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_ctypes.pyd
        • Size 139KB
        • SHA256 fd4847b99cd504a66bdc4739f15181b562774e6736bb88775880b073276dede1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_hashlib.pyd
        • Size 67KB
        • SHA256 9bc6ffcd2ab4ac87c4035f18b432e888d0d4a36795c97bf3f28ddf32cc34e40f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_lzma.pyd
        • Size 157KB
        • SHA256 39e5bc3624a26c9f6ad2e2df412543b0bd697a1d75338b44fe99763358d6d8cb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _queue.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_queue.pyd
        • Size 35KB
        • SHA256 acf60e246f6a83a914fb6c411f04bd3eb8bba83070612ca44af99d74f06c5524
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_socket.pyd
        • Size 85KB
        • SHA256 65caaa6f35c329d901ba3f3d9f7fc4d7443dcde89907dccbd6748786cc517476
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ssl.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_ssl.pyd
        • Size 180KB
        • SHA256 12e31f50739e33b115c7e10febf1ccedeb5d9353cd539c608cc5dd164bee17a7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _wmi.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_wmi.pyd
        • Size 39KB
        • SHA256 6fb2c6316628664319b2abcf961f0cbbac809966a65b653c86e7864ad8701496
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _zstd.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\_zstd.pyd
        • Size 491KB
        • SHA256 54e6acfbc1cb27c9afea0e133cadac68b89869ff1a14eb0c678d40eb9c655347
        • MD5 SHA1 SHA512 SSDEEP TLSH

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\base_library.zip
        • Size 1.3MB
        • SHA256 56ab4223444353c75ec96e4a236514177fe9f412888a9f15da13d5776692da0e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libcrypto-3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\libcrypto-3.dll
        • Size 5.0MB
        • SHA256 8b27ebae75cc99f20075322446af36c9ffcb4e3b400a77d712ef43f007f47f7d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libffi-8.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\libffi-8.dll
        • Size 38KB
        • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libssl-3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\libssl-3.dll
        • Size 776KB
        • SHA256 56dd50fb903b860ace831d0cd6c6250cd57e8655867c3a0fa16eac2d4cc0ba0b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _psutil_windows.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\psutil\_psutil_windows.pyd
        • Size 69KB
        • SHA256 0035450801bd7d938e9e146c5ec28e619cb5a5f4a18cdc53ac7e9734c7f94f78
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\python3.dll
        • Size 72KB
        • SHA256 f3d0cd260a46a9617a8b1d4d5e8703278478c22a910165bffb4e4ddf6562d93f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python314.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\python314.dll
        • Size 6.5MB
        • SHA256 18310593c50ad109fc5c95db1fd5c92ecec9e1bfc66c976df9fc11dd62616d5a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pywintypes314.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\pywin32_system32\pywintypes314.dll
        • Size 133KB
        • SHA256 e62808f40462f8066c8d19811cebd15467de6992b1cb48be5f5903910f5395f7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Lorem ipsum.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\setuptools\_vendor\jaraco\text\Lorem ipsum.txt
        • Size 1KB
        • SHA256 37fedcffbf73c4eb9f058f47677cb33203a436ff9390e4d38a8e01c9dad28e0b
        • MD5 SHA1 SHA512 TLSH

        ucrtbase.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\ucrtbase.dll
        • Size 1.1MB
        • SHA256 c04daeba7e7c4b711d33993ab4c51a2e087f98f4211aea0dcb3a216656ba0ab7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\unicodedata.pyd
        • Size 740KB
        • SHA256 a7a2bfeed5d0480d8c458b3a61ee32c478ae10c694e8be61c3ba0e8cc2a6e1c6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        win32api.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\win32\win32api.pyd
        • Size 136KB
        • SHA256 9004920e2c7863c34d0b3c4183ab3e1482475817cfb64f4f198e1fdd43f48f4e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        win32security.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI9082\win32\win32security.pyd
        • Size 130KB
        • SHA256 ea6806e8f9e940a890571c0c2545f851e57e9b8daea11f920a19c7cb4c01468d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        create_shortcut.vbs

        • Path C:\Windows\Temp\create_shortcut.vbs
        • Size 272B
        • SHA256 68acbc758b2fa0c62933bba3608c763bb5a83116df69f36b9c5215760207a5ea
        • MD5 SHA1 SHA512 TLSH