Analysis

  • user interaction
    yes
  • max time kernel
    13s
  • max time network
    16s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    19/10/2026, 02:00

General

  • Target
    emubyrei.exe
  • Size 23.6MB
  • Sample261019-cey6badf86
  • SHA256 ba7d077c2752e3552d63e31dbbe49748d4b000dc568b1d0cf95e1f10a0be9316
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: DarkSideRAT

    DarkSideRAT is a remote access trojan.

  • Detects DarkSideRAT 3 IoCs
  • Downloads MZ/PE file 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Stops running service(s) 4 TTPs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Network Share Discovery 1 TTPs

    Attempt to gather information on host network.

  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\emubyrei.exe
    "C:\Users\Admin\AppData\Local\Temp\emubyrei.exe"
    1⤵
    • Downloads MZ/PE file
    • Checks whether UAC is enabled
    • Suspicious use of SetThreadContext
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5960
    • C:\Users\Admin\AppData\Local\Temp\emubyrei.exe
      "C:\Users\Admin\AppData\Local\Temp\emubyrei.exe"
      2⤵
        PID:1172
      • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
        "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --embedded-browser-webview=1 --webview-exe-name=emubyrei.exe --webview-exe-version=1.0.0 --user-data-dir="C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView" --noerrdialogs --embedded-browser-webview-dpi-awareness=2 --edge-webview-custom-scheme --autoplay-policy=no-user-gesture-required --disable-features=msWebOOUI,msPdfOOUI,msSmartScreenProtection --enable-features=MojoIpcz,RemoveRedirectionBitmap --lang=en-US --accept-lang=en-US --mojo-named-platform-channel-pipe=5960.2812.7789740349330942639 /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a
        2⤵
        • Enumerates system info in registry
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of WriteProcessMemory
        PID:5880
        • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
          "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --type=crashpad-handler --user-data-dir=C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView /prefetch:4 /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a --monitor-self-annotation=ptype=crashpad-handler --database=C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\Crashpad --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=122.0.6261.139 "--annotation=exe=C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --annotation=plat=Win64 "--annotation=prod=Edge WebView2" --annotation=ver=122.0.2365.106 --initial-client-data=0x184,0x188,0x18c,0x160,0x194,0x7ff863f25fd8,0x7ff863f25fe4,0x7ff863f25ff0
          3⤵
            PID:4136
          • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
            "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --type=gpu-process --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView" --webview-exe-name=emubyrei.exe --webview-exe-version=1.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --edge-webview-custom-scheme --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=1776 --field-trial-handle=1780,i,1813811930852939237,2951773893210553531,262144 --enable-features=MojoIpcz,RemoveRedirectionBitmap --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version /prefetch:2 /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a
            3⤵
              PID:4072
            • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
              "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView" --webview-exe-name=emubyrei.exe --webview-exe-version=1.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --edge-webview-custom-scheme --no-appcompat-clear --mojo-platform-channel-handle=2128 --field-trial-handle=1780,i,1813811930852939237,2951773893210553531,262144 --enable-features=MojoIpcz,RemoveRedirectionBitmap --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version /prefetch:3 /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a
              3⤵
                PID:3368
              • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
                "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView" --webview-exe-name=emubyrei.exe --webview-exe-version=1.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --edge-webview-custom-scheme --no-appcompat-clear --mojo-platform-channel-handle=2436 --field-trial-handle=1780,i,1813811930852939237,2951773893210553531,262144 --enable-features=MojoIpcz,RemoveRedirectionBitmap --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version /prefetch:8 /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a
                3⤵
                  PID:2412
                • C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe
                  "C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.106\msedgewebview2.exe" --type=renderer --noerrdialogs --user-data-dir="C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView" --webview-exe-name=emubyrei.exe --webview-exe-version=1.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --edge-webview-custom-scheme --no-appcompat-clear --autoplay-policy=no-user-gesture-required --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=" --mojo-platform-channel-handle=3420 --field-trial-handle=1780,i,1813811930852939237,2951773893210553531,262144 --enable-features=MojoIpcz,RemoveRedirectionBitmap --disable-features=msPdfOOUI,msSmartScreenProtection,msWebOOUI --variations-seed-version /pfhostedapp:12d238ddff23835dcc9c823e07349c9419717e2a /prefetch:1
                  3⤵
                    PID:4652
                • C:\Windows\system32\cmd.exe
                  /c start C:\Users\Admin\AppData\Local\Temp\ox_1792375221069.exe
                  2⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4156
                  • C:\Users\Admin\AppData\Local\Temp\ox_1792375221069.exe
                    C:\Users\Admin\AppData\Local\Temp\ox_1792375221069.exe
                    3⤵
                    • Executes dropped EXE
                    PID:3612
                    • C:\Windows\System32\ktmutil.exe
                      "C:\Windows\System32\ktmutil.exe"
                      4⤵
                        PID:1704
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c sc stop vgc >nul 2>&1
                    2⤵
                    • Executes a command shell one-liner
                    • Suspicious use of WriteProcessMemory
                    PID:3920
                    • C:\Windows\system32\sc.exe
                      sc stop vgc
                      3⤵
                      • Launches sc.exe
                      PID:4928
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c sc start vgc >nul 2>&1
                    2⤵
                    • Executes a command shell one-liner
                    PID:3760
                    • C:\Windows\system32\sc.exe
                      sc start vgc
                      3⤵
                      • Launches sc.exe
                      PID:4076

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      103621DE9CD5414CC2538780B4B75751

                      • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751
                      • Size 808B
                      • SHA256 3dd5ea8a14eb665ba6057d424f94e5e83757ffaab456578dbf038af04053b19e
                      • MD5 SHA1 SHA512 TLSH

                      103621DE9CD5414CC2538780B4B75751

                      • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751
                      • Size 192B
                      • SHA256 5c0c7a869204ddd4b1a224fa1b065d246c16675989a5cc964be1f0fc5eb720f5
                      • MD5 SHA1 SHA512 TLSH

                      Retev[1].htm

                      • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\2T8DCGKW\Retev[1].htm
                      • Size 56KB
                      • SHA256 0d0a91c58d930d76a2600f1b75965a4edfb63357284c5965fb3b3f08266f0237
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      090049f1-f2e0-4abe-aabf-0655ac848b99.tmp

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\090049f1-f2e0-4abe-aabf-0655ac848b99.tmp
                      • Size 2KB
                      • SHA256 3d9ccf7da1caa7153f560670f1a2ce9f11af003f51a129d8c3ad0f2dfd084a30
                      • MD5 SHA1 SHA512 TLSH

                      70910a5e-2eab-4ea1-a04c-150853fa168e.tmp

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\70910a5e-2eab-4ea1-a04c-150853fa168e.tmp
                      • Size 3KB
                      • SHA256 35802a4d52aeed7d300e93000af0a7be381ffeb8135cb720c4ddc1b7f64c1678
                      • MD5 SHA1 SHA512 TLSH

                      785a8ca6-db17-48f8-b957-6578576f93b0.tmp

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\785a8ca6-db17-48f8-b957-6578576f93b0.tmp
                      • Size 15KB
                      • SHA256 27112ffcee1762632c15c7195012f269c6a5086cefb4cf2d4ceee37c90f8fd8f
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      settings.dat

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\Crashpad\settings.dat
                      • Size 280B
                      • SHA256 3ab6839a5623031dd828f59cd432437ba5b24a3d87664c814468645d0120d29c
                      • MD5 SHA1 SHA512 TLSH

                      settings.dat

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\Crashpad\settings.dat
                      • Size 280B
                      • SHA256 ba0726fdef87a708213bfc7e11c7cbda2025a27900c08fc8899e8c5a0799a5c1
                      • MD5 SHA1 SHA512

                      throttle_store.dat

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

                      MANIFEST-000001

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

                      SCT Auditing Pending Reports

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

                      CURRENT

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

                      data_0

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\GrShaderCache\data_0
                      • Size 8KB
                      • SHA256 d6a5fe39cd672781b256e0e3102f7022635f1d4bb7cfcc90a80fffe4d0f3877e
                      • MD5 SHA1 SHA512 SSDEEP

                      data_1

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\GrShaderCache\data_1
                      • Size 264KB
                      • SHA256 902f30c1fb0597d0734bc34b979ec5d131f8f39a4b71b338083821216ec8d61b
                      • MD5 SHA1 SHA512 SSDEEP

                      data_2

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\GrShaderCache\data_2
                      • Size 8KB
                      • SHA256 ec1702806f4cc7c42a82fc2b38e89835fde7c64bb32060e0823c9077ca92efb7
                      • MD5 SHA1 SHA512 SSDEEP

                      data_3

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\GrShaderCache\data_3
                      • Size 8KB
                      • SHA256 e09f42c398d688dce168570291f1f92d079987deda3099a34adb9e8c0522b30c
                      • MD5 SHA1 SHA512 SSDEEP

                      Local State

                      • Path C:\Users\Admin\AppData\Local\com.vgkservices.launcher\EBWebView\Local State
                      • Size 1KB
                      • SHA256 e74cd1c3a2f5f7439a903bb9c0cec0101fcfafa978eac2c3f223b65b3c650050
                      • MD5 SHA1 SHA512 TLSH

                      memory/1172-0-0x0000000140000000-0x0000000140015000-memory.dmp

                      memory/1172-1-0x0000000140000000-0x0000000140015000-memory.dmp

                      memory/1704-256-0x000002126B7E0000-0x000002126B7E1000-memory.dmp

                      memory/1704-255-0x000002126B0C0000-0x000002126B7D9000-memory.dmp

                      memory/4072-131-0x00007FF8855A0000-0x00007FF8855A1000-memory.dmp

                      memory/4652-124-0x00007FF8855A0000-0x00007FF8855A1000-memory.dmp

                      memory/5960-2-0x0000000140000000-0x00000001417AC000-memory.dmp

                      memory/5960-237-0x0000000140000000-0x00000001417AC000-memory.dmp