Analysis

  • user interaction
    yes
  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    12/08/2026, 21:28

General

  • Target
    OperaInstaller.exe
  • Size 178KB
  • Sample260812-1bmvwavepg
  • SHA256 20b545c7b0b0cb56926972b7fc2a94f428b7aa3e4f9f4e65d1bd0ad800fb60b7
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Downloads MZ/PE file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 3 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 2 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 6 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:4360
    • 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:4184
      • C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\installer.exe
        C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\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:2772
        • C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\installer.exe
          C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\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=134.0.5954.56 --initial-client-data=0x2b4,0x2b8,0x2bc,0x290,0x2c0,0x7ff73280ad88,0x7ff73280ad94,0x7ff73280ada0
          4⤵
          • Executes dropped EXE
          PID:4948
        • C:\Users\Admin\AppData\Local\Temp\.opera\a2dad84e-fd34-4347-bad7-47ef7968b96d Opera Installer Temp\installer.exe
          "C:\Users\Admin\AppData\Local\Temp\.opera\a2dad84e-fd34-4347-bad7-47ef7968b96d Opera Installer Temp\installer.exe" --version
          4⤵
          • Executes dropped EXE
          PID:3368
        • C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\installer.exe
          "C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\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=2772 --package-dir-prefix="C:\Users\Admin\AppData\Local\Temp\.opera\a2dad84e-fd34-4347-bad7-47ef7968b96d Opera Installer Temp\opera_package_20260812223014" --session-guid=d7f7e85e-8dd0-41f0-9fa7-70657a486c07 --server-tracking-blob=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 --silent --desktopshortcut=1 --wait-for-package --initial-proc-handle=F407000000000000
          4⤵
          • Executes dropped EXE
          • Enumerates connected drives
          • Enumerates system info in registry
          • Suspicious use of WriteProcessMemory
          PID:5244
          • C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\installer.exe
            C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\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=134.0.5954.56 --initial-client-data=0x2ac,0x2b0,0x2c0,0x288,0x2c4,0x7ff73280ad88,0x7ff73280ad94,0x7ff73280ada0
            5⤵
            • Executes dropped EXE
            PID:4748
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:4352
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4520
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
      1⤵
        PID:2404

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5
            • Size 471B
            • SHA256 f84f5b33979cdd57f8cba10cb7bcf79c07a5a8afaf5801aac8601092a02cce6e
            • MD5 SHA1 SHA512 TLSH

            E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\E2C6CBAF0AF08CF203BA74BF0D0AB6D5_CB77E3D8FE906716C4DEE1FAFFCB74A5
            • Size 416B
            • SHA256 e83457dfbce71162e47bedc4b376126a90444d78669c278667fd77254922ead0
            • MD5 SHA1 SHA512 TLSH

            installer.exe

            • Path C:\Users\Admin\AppData\Local\Temp\7zS850D47A9\installer.exe
            • Size 8.3MB
            • SHA256 3e1ee4a6d766e4e155d4818034c8e55efcfa743368a4e96a3b966badd7e09e14
            • MD5 SHA1 SHA512 SSDEEP TLSH

            OpInst.exe

            • Path C:\Users\Admin\AppData\Local\Temp\OpInst.exe
            • Size 3.1MB
            • SHA256 c1431112d4bf9e88037be564ba787ddaffa2d4d0147840c802aedc4fea46da13
            • 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 5f589b2c9ccbbea1a8f2766c9af0d840f0bc0e2ee2ed31d20683ce8d24460b73
            • MD5 SHA1 SHA512

            memory/4352-83-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-85-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-93-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-94-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-92-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-91-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-90-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp

            memory/4352-89-0x000001B8C8D50000-0x000001B8C8D51000-memory.dmp