Analysis

  • user interaction
    yes
  • max time kernel
    90s
  • max time network
    92s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    05/07/2026, 22:09

General

  • Target
    $PLUGINSDIR/gcinst.exe
  • Size 1.3MB
  • Sample260705-121vesf12v
  • SHA256 5690d7de821e2d10210b6ae5f9a490934bc77a3005ee72c56eed00fea63bf4ce
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Drops file in Program Files directory 64 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gcinst.exe
    "C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gcinst.exe"
    1⤵
    • Drops file in Program Files directory
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4156
    • C:\Program Files (x86)\Google\GoogleUpdateSetup.exe
      GoogleUpdateSetup.exe /silent /alwayslaunchcmd /install "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&appname=Google%20Chrome&needsadmin=True&brand=PNABB" /appargs "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&installerdata=%7B%22distribution%22%3A%7B%22suppress_first_run_bubble%22%3Atrue%2C%22do_not_launch_chrome%22%3Atrue%2C%22make_chrome_default%22%3Atrue%7D%2C%22sync_promo%22%3A%7B%22show_on_first_run_allowed%22%3Afalse%7D%2C%22first_run_tabs%22%3A%5B%22chrome%3A%2F%2Fwelcome%22%2C%22https%3A%2F%2Fwww.google.com%22%5D%2C%22session%22%3A%7B%22restore_on_startup%22%3A4%2C%22startup_urls%22%3A%5B%22https%3A%2F%2Fwww.google.com%2F%22%5D%2C%22restore_on_startup_migrated%22%3Atrue%7D%7D"
      2⤵
      • Drops file in Program Files directory
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2072
      • C:\Program Files (x86)\Google\Temp\GUM4060.tmp\GoogleUpdate.exe
        "C:\Program Files (x86)\Google\Temp\GUM4060.tmp\GoogleUpdate.exe" /silent /alwayslaunchcmd /install "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&appname=Google%20Chrome&needsadmin=True&brand=PNABB" /appargs "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&installerdata=%7B%22distribution%22%3A%7B%22suppress_first_run_bubble%22%3Atrue%2C%22do_not_launch_chrome%22%3Atrue%2C%22make_chrome_default%22%3Atrue%7D%2C%22sync_promo%22%3A%7B%22show_on_first_run_allowed%22%3Afalse%7D%2C%22first_run_tabs%22%3A%5B%22chrome%3A%2F%2Fwelcome%22%2C%22https%3A%2F%2Fwww.google.com%22%5D%2C%22session%22%3A%7B%22restore_on_startup%22%3A4%2C%22startup_urls%22%3A%5B%22https%3A%2F%2Fwww.google.com%2F%22%5D%2C%22restore_on_startup_migrated%22%3Atrue%7D%7D"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:700

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        GoogleUpdateSetup.exe

        • Path C:\Program Files (x86)\Google\GoogleUpdateSetup.exe
        • Size 1.3MB
        • SHA256 027299ea8dfa96e0e59794c59abfd562e2f675e8b8b9a84028da8c58c58d243f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        GoogleUpdate.exe

        • Path C:\Program Files (x86)\Google\Temp\GUM4060.tmp\GoogleUpdate.exe
        • Size 158KB
        • SHA256 581edeca339bb8c5ebc1d0193ad77f5cafa329c5a9adf8f5299b1afabed6623b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        goopdate.dll

        • Path C:\Program Files (x86)\Google\Temp\GUM4060.tmp\goopdate.dll
        • Size 1.9MB
        • SHA256 3244dd164b91b1db785b84438d54ea69051bc9e2a21bf523bd09bbe1005c3307
        • MD5 SHA1 SHA512 SSDEEP TLSH

        goopdateres_en.dll

        • Path C:\Program Files (x86)\Google\Temp\GUM4060.tmp\goopdateres_en.dll
        • Size 42KB
        • SHA256 713cd0392fd4a096560be8dcf5757adc6e02d919742a8ad7b4b0856e2ba53534
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsi3FF3.tmp\System.dll
        • Size 11KB
        • SHA256 a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1
        • MD5 SHA1 SHA512 SSDEEP TLSH