Analysis

  • user interaction
    yes
  • max time kernel
    83s
  • max time network
    86s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/09/2026, 16:56

General

  • Target
    OperaInstaller.exe
  • Size 178KB
  • Sample260905-vf7sysyejc
  • SHA256 20b545c7b0b0cb56926972b7fc2a94f428b7aa3e4f9f4e65d1bd0ad800fb60b7
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Downloads MZ/PE file 2 IoCs
  • Executes dropped EXE 9 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.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 4 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 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 6 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OperaInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\OperaInstaller.exe"
    1⤵
    • Downloads MZ/PE file
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\OpInst.exe
      "C:\Users\Admin\AppData\Local\Temp\OpInst.exe" --silent --allusers=0 --setdefaultbrowser=1
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1872
      • C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe
        C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe --silent --allusers=0 --setdefaultbrowser=1 --server-tracking-blob=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
        3⤵
        • Downloads MZ/PE file
        • Executes dropped EXE
        • Enumerates connected drives
        • Enumerates system info in registry
        • Suspicious use of WriteProcessMemory
        PID:3808
        • C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe
          C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktop --annotation=ver=135.0.5973.92 --initial-client-data=0x2ac,0x2b0,0x2b4,0x288,0x2b8,0x7ff7f92c2608,0x7ff7f92c2618,0x7ff7f92c2628
          4⤵
          • Executes dropped EXE
          PID:5020
        • C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\installer.exe" --version
          4⤵
          • Executes dropped EXE
          PID:4972
        • C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe
          "C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe" --backend --install --import-browser-data=0 --enable-crash-reporting=1 --enable-stats=1 --enable-installer-stats=1 --consent-given=0 --general-interests=0 --general-location=0 --personalized-content=0 --personalized-ads=0 --launchopera=1 --showunbox=0 --installfolder="C:\Users\Admin\AppData\Local\Programs\Opera" --profile-folder --language=en --singleprofile=0 --copyonly=0 --allusers=0 --setdefaultbrowser=1 --pintotaskbar=1 --pintostartmenu=0 --run-at-startup=1 --show-intro-overlay --server-tracking-data=server_tracking_data --initial-pid=3808 --package-dir-prefix="C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_20260905175734" --session-guid=29d31a1a-5d8b-419e-8aa3-00dad9e3b589 --server-tracking-blob=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 --silent --desktopshortcut=1 --wait-for-package --initial-proc-handle=9406000000000000
          4⤵
          • Executes dropped EXE
          • Enumerates connected drives
          • Enumerates system info in registry
          • Suspicious use of WriteProcessMemory
          PID:3256
          • C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe
            C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktop --annotation=ver=135.0.5973.92 --initial-client-data=0x2b8,0x2bc,0x2c0,0x288,0x2c4,0x7ff7f92c2608,0x7ff7f92c2618,0x7ff7f92c2628
            5⤵
            • Executes dropped EXE
            PID:1736
        • C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\Assistant_130.0.5847.41_Setup.exe_sfx.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\Assistant_130.0.5847.41_Setup.exe_sfx.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:5340
        • C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\assistant_installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\assistant_installer.exe" --version
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Enumerates system info in registry
          • Suspicious use of WriteProcessMemory
          PID:3460
          • C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\assistant_installer.exe
            "C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\assistant_installer.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktop --annotation=ver=130.0.5847.41 --initial-client-data=0x24c,0x250,0x254,0x228,0x258,0x3c4040,0x3c404c,0x3c4058
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            PID:3260

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        8A7891822FCFF127E4EADADE9757112B

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8A7891822FCFF127E4EADADE9757112B
        • Size 2KB
        • SHA256 887a51f0bb296758a866a423842e1486159d518eaf0ed0322f8f41287cbae311
        • MD5 SHA1 SHA512 TLSH

        8A7891822FCFF127E4EADADE9757112B

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8A7891822FCFF127E4EADADE9757112B
        • Size 246B
        • SHA256 51460cddedeac4bd2b7bc8a351e9b68dc99f4d7f7409986f003076eb29224be1
        • MD5 SHA1 SHA512 TLSH

        additional_file0.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\additional_file0.tmp
        • Size 2.8MB
        • SHA256 71a4cc628fd1716fd994689c4808d2ebbc00e8bd2ecb7600b9921baa8916c752
        • MD5 SHA1 SHA512 SSDEEP TLSH

        assistant_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\assistant_installer.exe
        • Size 2.4MB
        • SHA256 63187b388e01fb05d8c29957e1c566324af67aff2f7a2e3da9132248c79375a8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbgcore.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\dbgcore.DLL
        • Size 222KB
        • SHA256 7bb46348c2ec97ef9ee7a8e0ae28c8e069513e8acaee2689134a2d906b5fdecf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dbghelp.dll

        • Path C:\Users\Admin\AppData\Local\Temp\.opera\7135062c-d5ab-4a0c-995f-e22dcd2e1ac0 Opera Installer Temp\opera_package_202609051757341\assistant\dbghelp.dll
        • Size 1.8MB
        • SHA256 6fd2b4bfc275ed306ce09008ff8437818b3373e69e4b3db3cbb79be91b2b9308
        • MD5 SHA1 SHA512 SSDEEP TLSH

        installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\7zS057FB1C9\installer.exe
        • Size 8.3MB
        • SHA256 62b5c5cfda3377ef4f252b3262c8c4b72b66cc44aeb1f106ab7d56d3a89921e1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        OpInst.exe

        • Path C:\Users\Admin\AppData\Local\Temp\OpInst.exe
        • Size 3.1MB
        • SHA256 ce10650b42046438c10a04a1a3852e42caf2795f16e56086decfd690d1f52d40
        • MD5 SHA1 SHA512 SSDEEP TLSH

        bg.png

        • Path C:\Users\Admin\AppData\Local\Temp\bg.png
        • Size 224KB
        • SHA256 5fa976ea5780439175bb696817cd6eab3625ba5ccfe5b220587130ed5e1da855
        • MD5 SHA1 SHA512 SSDEEP TLSH

        settings.dat

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports\settings.dat
        • Size 40B
        • SHA256 bf639307ec66789c84f0ffbbd18342c123f54eb2f3c32c3a000a62e276d6fd8a
        • MD5 SHA1 SHA512