Analysis

  • max time kernel
    115s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2024, 11:05

General

  • Target
    OperaGXSetup.exe
  • Size 3.4MB
  • Sample240404-m678eadg36
  • SHA256 ff790dc3f6624ff623cf4f93f801d351062b40e4cd7f049b4dcd3c28a1b5b8a5
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe
      C:\Users\Admin\AppData\Local\Temp\OperaGXSetup.exe --type=crashpad-handler /prefetch:7 --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.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=93.0.4585.78 --initial-client-data=0x2f8,0x2fc,0x300,0x2f4,0x2d0,0x758976a0,0x758976b0,0x758976bc
      2⤵
      • Loads dropped DLL
      PID:2148
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\OperaGXSetup.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\OperaGXSetup.exe" --version
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:2036
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\_sfx.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\_sfx.exe"
      2⤵
      • Executes dropped EXE
      PID:3344
    • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\assistant_installer.exe
      "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\assistant_installer.exe" --version
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2592
      • C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\assistant_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\assistant_installer.exe" --type=crashpad-handler /prefetch:7 --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.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktopGX --annotation=ver=73.0.3856.382 --initial-client-data=0x26c,0x270,0x274,0x248,0x278,0xac4f48,0xac4f58,0xac4f64
        3⤵
        • Executes dropped EXE
        PID:4984
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2744 --field-trial-handle=2244,i,861925222566734100,5228329984880658054,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2892

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          OperaGXSetup.exe

          • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\OperaGXSetup.exe
          • Size 3.4MB
          • SHA256 ff790dc3f6624ff623cf4f93f801d351062b40e4cd7f049b4dcd3c28a1b5b8a5
          • MD5 SHA1 SHA512 SSDEEP

          additional_file0.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\additional_file0.tmp
          • Size 1.4MB
          • SHA256 e950f17f4181009eeafa9f5306e8a9dfd26d88ca63b1838f44ff0efc738e7d1f
          • MD5 SHA1 SHA512 SSDEEP

          assistant_installer.exe

          • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\assistant\assistant_installer.exe
          • Size 1.8MB
          • SHA256 afe569ce9e4f71c23ba5f6e8fd32be62ac9538e397cde8f2ecbe46faa721242a
          • MD5 SHA1 SHA512 SSDEEP

          opera_package

          • Path C:\Users\Admin\AppData\Local\Temp\.opera\Opera GX Installer Temp\opera_package_202404041106041\opera_package
          • Size 118.8MB
          • SHA256 78f5dc88776fd34cdcf47d0a7abc68bb0b9a3f59bff29f0ee434dc265f4ef34e
          • MD5 SHA1 SHA512 SSDEEP

          Opera_installer_2404041106003402204.dll

          • Path C:\Users\Admin\AppData\Local\Temp\Opera_installer_2404041106003402204.dll
          • Size 5.0MB
          • SHA256 c82bb46fa8ef5b6175c35cc9f2df765ad668eabd186f62c6097924b24bf2c74c
          • MD5 SHA1 SHA512 SSDEEP

          settings.dat

          • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat
          • Size 40B
          • SHA256 e72541b117c2c0f93db90ab77a756bdb3297b0c1896c1147119cafa40edfbaf1
          • MD5 SHA1 SHA512

          memory/2036-14-0x0000000000400000-0x00000000009A5000-memory.dmp

          memory/2036-19-0x0000000000400000-0x00000000009A5000-memory.dmp

          memory/2148-5-0x0000000000400000-0x00000000009A5000-memory.dmp

          memory/2148-35-0x0000000000400000-0x00000000009A5000-memory.dmp

          memory/2204-0-0x0000000000400000-0x00000000009A5000-memory.dmp

          memory/2204-34-0x0000000000400000-0x00000000009A5000-memory.dmp