Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    159s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260911-en
  • resource tags

    arch:x64arch:x86image:win11-20260911-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    16/09/2026, 22:43

General

  • Target
    OptiScaler/libxess_dx11.dll
  • Size 152KB
  • Sample260916-2nhmcsfb96
  • SHA256 c7cfe86f0c9d94e4fb3696d3cd5035e2bbb6a8b1b0572f8b7395a4cdfd0c625e
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
3/10

Malware Config

Signatures

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • System Time Discovery 1 TTPs 1 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 16 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\OptiScaler\libxess_dx11.dll,#1
    1⤵
      PID:3656
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Modifies data under HKEY_USERS
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4612
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=140.0.7339.81 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7fff4b3bc728,0x7fff4b3bc734,0x7fff4b3bc740
        2⤵
          PID:2556
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-pre-read-main-dll --force-high-res-timeticks=disabled --metrics-shmem-handle=1840,i,10785126428699046714,3461190887222635423,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=2124 /prefetch:11
          2⤵
          • System Time Discovery
          PID:5064
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-pre-read-main-dll --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADgAAAIAAAAAAAAAAAAAGAAAQAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=1656,i,12750983527825472876,10388394759920761912,262144 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=2088 /prefetch:2
          2⤵
            PID:4632
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=2388,i,4203952402657644181,8963156530462905790,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=2400 /prefetch:13
            2⤵
              PID:2200
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --metrics-shmem-handle=3240,i,2685428555780917767,215368316452114575,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=3440 /prefetch:1
              2⤵
                PID:4764
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --metrics-shmem-handle=3364,i,9964714867980991120,14510569440353649290,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=3460 /prefetch:1
                2⤵
                  PID:1632
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --extension-process --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --metrics-shmem-handle=4316,i,17689930245169083341,975376739544105119,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=4328 /prefetch:9
                  2⤵
                    PID:1588
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --metrics-shmem-handle=4736,i,2175138542254076584,11489755352463425710,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=4752 /prefetch:1
                    2⤵
                      PID:4776
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=5476,i,7730426394452342529,6103986774300196356,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=5508 /prefetch:14
                      2⤵
                        PID:3868
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5776,i,13393398883871717260,15490963224174000876,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=5832 /prefetch:14
                        2⤵
                          PID:2664
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5536,i,17030166265872605739,16908607387101975945,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=5836 /prefetch:14
                          2⤵
                            PID:600
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5844,i,3133150177548120146,2259103649044634522,524288 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=5828 /prefetch:14
                            2⤵
                              PID:2496
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --metrics-shmem-handle=5888,i,12336886829116838200,14444616610642807205,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=5912 /prefetch:1
                              2⤵
                                PID:1404
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --metrics-shmem-handle=3416,i,11037112063112693977,5698237143975021145,2097152 --field-trial-handle=2092,i,3631989853680273583,13360810201972109430,262144 --variations-seed-version=20260911-090036.930000-production --mojo-platform-channel-handle=4876 /prefetch:1
                                2⤵
                                  PID:4680
                              • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
                                "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
                                1⤵
                                  PID:1908
                                • C:\Windows\system32\svchost.exe
                                  C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                                  1⤵
                                    PID:3452

                                  Network

                                        MITRE ATT&CK Enterprise v16

                                        Replay Monitor

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                                        Downloads

                                        BookmarkMergedSurfaceOrdering

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BookmarkMergedSurfaceOrdering
                                        • Size 6B
                                        • SHA256 4489f9e3e454748b3521eb214e0a5694d562cff3d9ff511cb456953c8f534c00
                                        • MD5 SHA1 SHA512

                                        BrowsingTopicsState

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BrowsingTopicsState
                                        • Size 414B
                                        • SHA256 19c3ca792cf815a5ad72e050ceb35121f958d4ffe1e7666ee3af3e3b9fa1b8a4
                                        • MD5 SHA1 SHA512 TLSH

                                        f_00001d

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_00001d
                                        • Size 345KB
                                        • SHA256 af74444f93c1a87703c134e8e3a1762932e8c9ed17b5781360a51435080b8704
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Network Persistent State

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                        • Size 7KB
                                        • SHA256 0f961729a186510fe172ab0ef8a9d2c899047c2255f268aa327bfc1a24487ec8
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        SCT Auditing Pending Reports

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports
                                        • Size 2B
                                        • SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
                                        • MD5 SHA1 SHA512

                                        Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                        • Size 11KB
                                        • SHA256 e8e84580554e9cf3eae2de5989006cb3c8556aa27667212cde08e8d7db298acd
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                        • Size 11KB
                                        • SHA256 9ced9dec38f10e2024b537dfe89220a9638b9aa10d36308fd840aeb68f869002
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                        • Size 12KB
                                        • SHA256 26512679794a83aa485599068281ab9094d5d19b75b8e8bec5a57b9988a1854d
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                        • Size 12KB
                                        • SHA256 6ecb0bc2e83a4d08f432a29f6d69be2c5a6f4566ac63d6b2828f231efeeb33c5
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                        • Size 13KB
                                        • SHA256 f703484677a91ce6300352d8d18cb401f464f383b4a095385ae490fbaeae11d1
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Secure Preferences

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Secure Preferences
                                        • Size 17KB
                                        • SHA256 4bfbe324691a23a534db53a22993451495e8f99857a002d285586cc0fc8ed7a5
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        the-real-index

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\the-real-index
                                        • Size 120B
                                        • SHA256 f627b5580940fea2cd94e05abb1c55cb1a4d93b9ad2c13eff80c894e9541dbe3
                                        • MD5 SHA1 SHA512 TLSH

                                        the-real-index~RFe5a2f4f.TMP

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\the-real-index~RFe5a2f4f.TMP
                                        • Size 96B
                                        • SHA256 a2b867c0d65c0e18273917bc86deaebcec97277f3d153835867926f405327c4e
                                        • MD5 SHA1 SHA512 TLSH

                                        the-real-index

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Shared Dictionary\cache\index-dir\the-real-index
                                        • Size 96B
                                        • SHA256 f32f7a78db7ff98a9d7cc304ccec851d9f51391b92ccbc81491fc7c1a28293a4
                                        • MD5 SHA1 SHA512 TLSH

                                        Local State

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                        • Size 261KB
                                        • SHA256 2fb650777004bca12d466800e1a9383ee9283166e210236f51b2d0ff33177752
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Local State

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                        • Size 131KB
                                        • SHA256 c9564eb3ae2dca7ac1702664756d7de344058e9152f23f1c45a5b8a6288490d7
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Local State

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                        • Size 261KB
                                        • SHA256 acf370f6207f3248bac7b7f448b65dfe21fdc207d7de739b1038664e67afd4ac
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        Local State

                                        • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                        • Size 262KB
                                        • SHA256 081bf747812bf130076bcfb52f39f5287be0ba7e0a53e2902fae01c82719df0a
                                        • MD5 SHA1 SHA512 SSDEEP TLSH