Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    28/09/2026, 12:35

General

  • Target
    OperaGXSetup.exe
  • Size 4.0MB
  • Sample260928-psfmcavyew
  • SHA256 13e57220e4882912f4e7be57364833f695ec3d0e9a9ecc06b1d6d5f803708c66
  • 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
  • Modifies system certificate store 2 TTPs 3 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:3664
    • C:\Users\Admin\AppData\Local\Temp\7zS05E24C49\installer.exe
      C:\Users\Admin\AppData\Local\Temp\7zS05E24C49\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
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3596
      • C:\Users\Admin\AppData\Local\Temp\7zS05E24C49\installer.exe
        C:\Users\Admin\AppData\Local\Temp\7zS05E24C49\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=136.0.6008.67 --initial-client-data=0x264,0x268,0x26c,0x240,0x270,0x7ff76dac7998,0x7ff76dac79a8,0x7ff76dac79b8
        3⤵
        • Executes dropped EXE
        PID:4116
      • C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\installer.exe" --version
        3⤵
        • Executes dropped EXE
        PID:716
      • C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\Opera_GX_assistant_136.0.6008.50_Setup.exe_sfx.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\Opera_GX_assistant_136.0.6008.50_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:4440
      • C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\assistant_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\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:2344
        • C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\assistant_installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\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=136.0.6008.50 --initial-client-data=0x220,0x224,0x228,0x1fc,0x22c,0x50c9cc,0x50c9d8,0x50c9e4
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          PID:4284

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Opera_GX_assistant_136.0.6008.50_Setup.exe_sfx.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\Opera_GX_assistant_136.0.6008.50_Setup.exe_sfx.exe
        • Size 2.9MB
        • SHA256 cdb600359a2ee392e9ff11e680770171531760b6d64319cf6bffc5c1341a0dc0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\assistant_installer.exe
        • Size 2.5MB
        • SHA256 5dda5f3ca9e230e79dc6c74ab74afe8d027cbd4db293ab0260dcf71010f6ff9b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        browser_assistant.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\browser_assistant.exe
        • Size 5.3MB
        • SHA256 4d033b0d0804e98418d736c57aef51d502bc131637e688a8381f2b8133a5856b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbgcore.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\dbgcore.DLL
        • Size 196KB
        • SHA256 0a08d02dbba60e940694a2c154d4b78969df546d40d8ec314cf6be1753f009d1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbghelp.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\dbghelp.dll
        • Size 1.8MB
        • SHA256 bb4c23816f445ae5122ba5fc7d8cdd77bb9e519ab107f450320829a98df52175
        • MD5 SHA1 SHA512 SSDEEP TLSH

        files_list

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\55773f7a-ffab-44b3-b7c2-c36d8a918130 Opera GX Installer Temp\opera_package_202609281335201\assistant\files_list
        • Size 72B
        • SHA256 5b3741e12f14d0ae54d450fff585c5fbfa7b360800c863722472d320c26b4ef4
        • MD5 SHA1 SHA512 TLSH

        installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\7zS05E24C49\installer.exe
        • Size 9.2MB
        • SHA256 b8560abe46e62b48e2c72a827928f062b4f748632284a22c497f77dd317c5bae
        • 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 41046808d20b65b4a362e36c5be5683db11db99c60ef889c9e1d069103e083d8
        • MD5 SHA1 SHA512