Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    13/08/2026, 20:12

General

  • Target
    nookat.exe
  • Size 20.8MB
  • Sample260813-yywp7axset
  • SHA256 3de8101ade41cf302a63646753c638ae18e8e434bf5b58465eb6649090105789
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Network Share Discovery 1 TTPs

    Attempt to gather information on host network.

  • Drops file in Program Files directory 3 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\nookat.exe
    "C:\Users\Admin\AppData\Local\Temp\nookat.exe"
    1⤵
    • Checks whether UAC is enabled
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:3576
    • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
      "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --embedded-browser-webview=1 --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --noerrdialogs --embedded-browser-webview-dpi-awareness=2 --autoplay-policy=no-user-gesture-required --disable-features=msWebOOUI,msPdfOOUI,msSmartScreenProtection --lang=en-US --mojo-named-platform-channel-pipe=3576.4396.14068060740115163630
      2⤵
      • Drops file in Program Files directory
      • Enumerates system info in registry
      • Modifies data under HKEY_USERS
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of WriteProcessMemory
      PID:2460
      • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
        "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=crashpad-handler --user-data-dir=C:\Users\Admin\AppData\Local\io.nookat\EBWebView /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Crashpad --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=132.0.6834.160 "--annotation=exe=C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --annotation=plat=Win64 "--annotation=prod=Edge WebView2" --annotation=ver=132.0.2957.140 --initial-client-data=0x15c,0x160,0x164,0x138,0x16c,0x7ff91119b078,0x7ff91119b084,0x7ff91119b090
        3⤵
          PID:4404
        • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
          "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=gpu-process --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --gpu-preferences=UAAAAAAAAADgAAAEAAAAAAAAAAAAAAAAAABgAAEAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAIAAAAAAAAAAgAAAAAAAAA --always-read-main-dll --field-trial-handle=1756,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=1636 /prefetch:2
          3⤵
            PID:3224
          • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
            "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --always-read-main-dll --field-trial-handle=2056,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=2068 /prefetch:3
            3⤵
              PID:1092
            • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
              "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --always-read-main-dll --field-trial-handle=1708,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=2396 /prefetch:8
              3⤵
                PID:556
              • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
                "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=renderer --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --autoplay-policy=no-user-gesture-required --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 --js-flags="--harmony-weak-refs-with-cleanup-some --expose-gc --ms-user-locale=" --always-read-main-dll --field-trial-handle=3644,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=3660 /prefetch:1
                3⤵
                  PID:2536
                • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
                  "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --always-read-main-dll --field-trial-handle=4640,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=4620 /prefetch:8
                  3⤵
                    PID:3984
                  • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe
                    "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\132.0.2957.140\msedgewebview2.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=5140 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --string-annotations --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\io.nookat\EBWebView" --webview-exe-name=nookat.exe --webview-exe-version=0.1.2 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --gpu-preferences=UAAAAAAAAADoAAAEAAAAAAAAAAAAAAAAAABgAAEAAAAAAAAAAAAAAAAAAABCAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAIAAAAAAAAAAgAAAAAAAAA --always-read-main-dll --field-trial-handle=4444,i,6264757135758885306,5973716564461103503,262144 --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version --mojo-platform-channel-handle=752 /prefetch:8
                    3⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:4468

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    settings.dat

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Crashpad\settings.dat
                    • Size 280B
                    • SHA256 683a2b04948d47d864b6473a13d6421c07b4c00970860633f41e4a46052e703b
                    • MD5 SHA1 SHA512 TLSH

                    settings.dat

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Crashpad\settings.dat
                    • Size 280B
                    • SHA256 5695be85ceb56170699e63952c2568e3437f684c4856c443eaa09385a73553c0
                    • MD5 SHA1 SHA512 TLSH

                    throttle_store.dat

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Crashpad\throttle_store.dat
                    • Size 20B
                    • SHA256 41c91a9c93d76295746a149dce7ebb3b9ee2cb551d84365fff108e59a61cc304
                    • MD5 SHA1 SHA512

                    the-real-index

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Code Cache\js\index-dir\the-real-index
                    • Size 48B
                    • SHA256 93e997bab6ddd90f9e5e6f86d66465a922a55c6746c1b4b1626ce8d5eb5c4319
                    • MD5 SHA1 SHA512

                    the-real-index

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Code Cache\js\index-dir\the-real-index
                    • Size 72B
                    • SHA256 b4ccfcbb210414b8633e8296fc247feefc7a281d3e6f0f94a87cda3f019cf4db
                    • MD5 SHA1 SHA512 TLSH

                    index

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\DawnGraphiteCache\index
                    • Size 256KB
                    • SHA256 93193948c4534695d498659a9e8a79f2bbcdb98093c542bf1eb8720a4c4e1fa9
                    • MD5 SHA1 SHA512 SSDEEP

                    data_0

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\DawnWebGPUCache\data_0
                    • Size 8KB
                    • SHA256 d6a5fe39cd672781b256e0e3102f7022635f1d4bb7cfcc90a80fffe4d0f3877e
                    • MD5 SHA1 SHA512 SSDEEP

                    data_1

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\DawnWebGPUCache\data_1
                    • Size 264KB
                    • SHA256 902f30c1fb0597d0734bc34b979ec5d131f8f39a4b71b338083821216ec8d61b
                    • MD5 SHA1 SHA512 SSDEEP

                    data_2

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\DawnWebGPUCache\data_2
                    • Size 8KB
                    • SHA256 ec1702806f4cc7c42a82fc2b38e89835fde7c64bb32060e0823c9077ca92efb7
                    • MD5 SHA1 SHA512 SSDEEP

                    data_3

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\DawnWebGPUCache\data_3
                    • Size 8KB
                    • SHA256 e09f42c398d688dce168570291f1f92d079987deda3099a34adb9e8c0522b30c
                    • MD5 SHA1 SHA512 SSDEEP

                    MANIFEST-000001

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Extension Rules\MANIFEST-000001
                    • Size 41B
                    • SHA256 f9d31b278e215eb0d0e9cd709edfa037e828f36214ab7906f612160fead4b2b4
                    • MD5 SHA1 SHA512

                    Network Persistent State

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Network\Network Persistent State
                    • Size 111B
                    • SHA256 5dfc321417fc31359f23320ea68014ebfd793c5bbed55f77dab4180bbd4a2026
                    • MD5 SHA1 SHA512 TLSH

                    Network Persistent State~RFe5979ab.TMP

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Network\Network Persistent State~RFe5979ab.TMP
                    • Size 59B
                    • SHA256 226eec4486509917aa336afebd6ff65777b75b65f1fb06891d2a857a9421a974
                    • MD5 SHA1 SHA512 TLSH

                    SCT Auditing Pending Reports

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Network\SCT Auditing Pending Reports
                    • Size 2B
                    • SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
                    • MD5 SHA1 SHA512

                    Preferences

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Preferences
                    • Size 6KB
                    • SHA256 015c81a1902c7666f121f93d245f99f0a0ff5410466874647b47ae89476c56ff
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Preferences~RFe58f2e7.TMP

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Preferences~RFe58f2e7.TMP
                    • Size 6KB
                    • SHA256 81082ea9afd185741d598c381aae7d0563f01ec7217451165f126d0d6061c8ea
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    CURRENT

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Default\Site Characteristics Database\CURRENT
                    • Size 16B
                    • SHA256 0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443
                    • MD5 SHA1 SHA512

                    Local State

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Local State
                    • Size 1KB
                    • SHA256 c0011afd48a6e197f39723ee9d8c7518a74f3842994b86ee074702ebde003b86
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Local State
                    • Size 2KB
                    • SHA256 b1574541eade30777321f687e28726b4386e904e3798df88c5f6986f77973af0
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Local State
                    • Size 3KB
                    • SHA256 5552b31290e6287898f6cfc0a9c0a8b5b318734c3f2e3d722d80ba35a6963fb0
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Local State
                    • Size 16KB
                    • SHA256 f6306a07aedd61f87ce06e397954c1979b7ad93b931fb5ae54def85c2853443f
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Local State~RFe58533c.TMP

                    • Path C:\Users\Admin\AppData\Local\io.nookat\EBWebView\Local State~RFe58533c.TMP
                    • Size 1KB
                    • SHA256 580c87a1bd667fa0a7f614b3d30d32479c3d8408e04d4d391b4309400aca80c0
                    • MD5 SHA1 SHA512 TLSH

                    memory/556-98-0x00007FF92CCE0000-0x00007FF92CCE1000-memory.dmp

                    memory/556-99-0x00007FF92B760000-0x00007FF92B761000-memory.dmp

                    memory/2536-147-0x00007FF92C740000-0x00007FF92C741000-memory.dmp

                    memory/3224-26-0x00007FF92C740000-0x00007FF92C741000-memory.dmp

                    memory/4468-293-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-294-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-295-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-299-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-305-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-304-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-303-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-302-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-301-0x000001F8825D0000-0x000001F8825D1000-memory.dmp

                    memory/4468-300-0x000001F8825D0000-0x000001F8825D1000-memory.dmp