Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    27/10/2026, 17:44

General

  • Target
    OperaGXSetup.exe
  • Size 4.0MB
  • Sample261027-wbnpyseb73
  • SHA256 a7c0959aff8c58376badb8aea7d93b125ba29e05044bd476a9534ce8f343d6dd
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Downloads MZ/PE file 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Writes a Windows system DLL name to a user directory 2 TTPs 1 IoCs

    A module named after a system DLL outside System32 can be loaded instead of the real one by a program searching that directory.

  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Users\Admin\AppData\Local\Temp\7zSCD1CF859\installer.exe
      C:\Users\Admin\AppData\Local\Temp\7zSCD1CF859\installer.exe --server-tracking-blob=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
      2⤵
      • Downloads MZ/PE file
      • Executes dropped EXE
      • Enumerates connected drives
      • Reads the TCP/IP host and domain name from the registry
      • Enumerates system info in registry
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3852
      • C:\Users\Admin\AppData\Local\Temp\7zSCD1CF859\installer.exe
        C:\Users\Admin\AppData\Local\Temp\7zSCD1CF859\installer.exe --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktopGX --annotation=ver=138.0.6044.45 --initial-client-data=0x2a0,0x2a4,0x2a8,0x27c,0x2ac,0x7ff69dc002d8,0x7ff69dc002e8,0x7ff69dc002f8
        3⤵
        • Executes dropped EXE
        PID:1116
      • C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\installer.exe" --version
        3⤵
        • Executes dropped EXE
        PID:256
      • C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\Opera_GX_assistant_138.0.6044.45_Setup.exe_sfx.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\Opera_GX_assistant_138.0.6044.45_Setup.exe_sfx.exe"
        3⤵
        • Executes dropped EXE
        • Writes a Windows system DLL name to a user directory
        • System Location Discovery: System Language Discovery
        PID:5652
      • C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\assistant_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\assistant_installer.exe" --version
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Enumerates system info in registry
        • Suspicious use of WriteProcessMemory
        PID:3052
        • C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\assistant_installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\assistant_installer.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=138.0.6044.45 --initial-client-data=0x24c,0x250,0x254,0x228,0x258,0x4ab558,0x4ab564,0x4ab570
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          PID:2320

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Opera_GX_assistant_138.0.6044.45_Setup.exe_sfx.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\Opera_GX_assistant_138.0.6044.45_Setup.exe_sfx.exe
        • Size 3.2MB
        • SHA256 ff87215ff4c75e1f741fae5b0d7d00b933c2e967e70ce31431d898a4de998131
        • MD5 SHA1 SHA512 SSDEEP TLSH

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\assistant_installer.exe
        • Size 2.5MB
        • SHA256 677a5ca267c49bcd4e39cba49ad0a7e2f489523a070f1b113512497f5d489d76
        • MD5 SHA1 SHA512 SSDEEP TLSH

        browser_assistant.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\browser_assistant.exe
        • Size 5.3MB
        • SHA256 8dbcc04ba61e81430dd5ced37d93e9a0a4d9c07cdbf69d1acd1a52cb3994e325
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbgcore.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\dbgcore.DLL
        • Size 238KB
        • SHA256 318609aa3f5a6022465532846da2d8e0beda1e12c6b1be3886fecd395cf2081c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbghelp.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\dbghelp.dll
        • Size 589KB
        • SHA256 762839a3070556ef17c36f291b733494ab5adc56a0c7587192c4896b320cc3d8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        files_list

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\files_list
        • Size 86B
        • SHA256 403b9075eb28634cb9000e1029fbfb968274642e3a2356d9fbc18c2ab3c60eaa
        • MD5 SHA1 SHA512 TLSH

        msdia140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\assistant\msdia140.dll
        • Size 2.5MB
        • SHA256 237adeb24922202177ef0c8d40750fe72b6490596263d4c9bcb4459a47cce4bd
        • MD5 SHA1 SHA512 SSDEEP TLSH

        custom_partner_content.json

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\492d13c9-9cf5-4802-a444-1fb3c4df8e36 Opera GX Installer Temp\opera_package_202610271745111\resources\custom_partner_content.json
        • Size 245KB
        • SHA256 84bc1efb211c6b45f2906278a36f1414922f994a9611bbee7713ffd4ae21e967
        • MD5 SHA1 SHA512 SSDEEP TLSH

        installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\7zSCD1CF859\installer.exe
        • Size 9.2MB
        • SHA256 fa1023f728eaaf0fa53b6b75813295bc376bc6a96c3ecf7829861bf4bc1dea59
        • MD5 SHA1 SHA512 SSDEEP TLSH

        settings.dat

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat
        • Size 40B
        • SHA256 60cfe70cb13404d4fd07be1f7bca1ad75bfbba539aae930e31230fa8d34c649b
        • MD5 SHA1 SHA512