Analysis

  • user interaction
    yes
  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    27/08/2026, 02:11

General

  • Target
    Synapse Bootstrapper.exe
  • Size 544KB
  • Sample260827-cmhtasyerc
  • SHA256 8a3b4f5568afdd277f1b134eb72dbcf4400319b1dced996a8b53da0e281818e3
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Downloads MZ/PE file 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 7 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Network Share Discovery 1 TTPs

    Attempt to gather information on host network.

  • ConfuserEx .NET packer 3 IoCs

    Detects ConfuserEx .NET packer.

  • Costura .NET executable packer 1 IoCs

    Costura packer aka Costura Fody, is an add-in for the .NET framework that embeds all external dependency .dll files as resources inside main executable.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Enumerates system info in registry 2 TTPs 6 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Synapse Bootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\Synapse Bootstrapper.exe"
    1⤵
    • Downloads MZ/PE file
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3200
    • C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe
      "C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe"
      2⤵
      • Downloads MZ/PE file
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1300
      • C:\Users\Admin\AppData\Local\Temp\bin\Decompiler.exe
        "bin\Decompiler.exe"
        3⤵
        • Executes dropped EXE
        PID:3740
      • 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="Synapse Launcher.exe" --webview-exe-version=1.0.0.0 --user-data-dir="C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView" --noerrdialogs --embedded-browser-webview-dpi-awareness=2 --mojo-named-platform-channel-pipe=1300.3920.10118563076207260760
        3⤵
        • Enumerates system info in registry
        • Modifies data under HKEY_USERS
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of WriteProcessMemory
        PID:1852
        • 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\Temp\Synapse Launcher.exe.WebView2\EBWebView" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\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,0x7ffb14dcb078,0x7ffb14dcb084,0x7ffb14dcb090
          4⤵
            PID:3932
          • 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\Temp\Synapse Launcher.exe.WebView2\EBWebView" --webview-exe-name="Synapse Launcher.exe" --webview-exe-version=1.0.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --gpu-preferences=UAAAAAAAAADgAAAEAAAAAAAAAAAAAAAAAABgAAEAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAIAAAAAAAAAAgAAAAAAAAA --always-read-main-dll --field-trial-handle=1680,i,9006883921837839097,785209006608443005,262144 --variations-seed-version --mojo-platform-channel-handle=1676 /prefetch:2
            4⤵
              PID:4596
            • 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\Temp\Synapse Launcher.exe.WebView2\EBWebView" --webview-exe-name="Synapse Launcher.exe" --webview-exe-version=1.0.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --always-read-main-dll --field-trial-handle=1376,i,9006883921837839097,785209006608443005,262144 --variations-seed-version --mojo-platform-channel-handle=2044 /prefetch:3
              4⤵
                PID:1668
              • 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\Temp\Synapse Launcher.exe.WebView2\EBWebView" --webview-exe-name="Synapse Launcher.exe" --webview-exe-version=1.0.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --always-read-main-dll --field-trial-handle=2348,i,9006883921837839097,785209006608443005,262144 --variations-seed-version --mojo-platform-channel-handle=2344 /prefetch:8
                4⤵
                  PID:2436
                • 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\Temp\Synapse Launcher.exe.WebView2\EBWebView" --webview-exe-name="Synapse Launcher.exe" --webview-exe-version=1.0.0.0 --embedded-browser-webview=1 --embedded-browser-webview-dpi-awareness=2 --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=3560,i,9006883921837839097,785209006608443005,262144 --variations-seed-version --mojo-platform-channel-handle=3576 /prefetch:1
                  4⤵
                    PID:3836
            • C:\Windows\System32\rundll32.exe
              C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {c82192ee-6cb5-4bc0-9ef0-fb818773790a} -Embedding
              1⤵
                PID:3940

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    Synapse Launcher.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe
                    • Size 3.6MB
                    • SHA256 4b4f8d6beb3a6739ee0971daedbdec3f47dee312a6be59ae62778e5e9b63fec7
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    settings.dat

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Crashpad\settings.dat
                    • Size 280B
                    • SHA256 c4c91c2f0bbb42d4c6f73cd5802609d75415305fcb3e18bdcfacff3cf5a3be01
                    • MD5 SHA1 SHA512

                    settings.dat

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Crashpad\settings.dat
                    • Size 280B
                    • SHA256 6e9df1748e14216baaa381866d40f60ca9102ab917e2a0116f2787404d891dcd
                    • MD5 SHA1 SHA512 TLSH

                    throttle_store.dat

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Crashpad\throttle_store.dat
                    • Size 20B
                    • SHA256 41c91a9c93d76295746a149dce7ebb3b9ee2cb551d84365fff108e59a61cc304
                    • MD5 SHA1 SHA512

                    7361ffa9-a7f8-4bff-b87c-213efe8ef815.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\7361ffa9-a7f8-4bff-b87c-213efe8ef815.tmp
                    • Size 6KB
                    • SHA256 ad109acafa41abad100bbeb3827fb3972ff8374e360967faa95a31c2c015cc38
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    data_0

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\DawnWebGPUCache\data_0
                    • Size 8KB
                    • SHA256 d6a5fe39cd672781b256e0e3102f7022635f1d4bb7cfcc90a80fffe4d0f3877e
                    • MD5 SHA1 SHA512 SSDEEP

                    data_1

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\DawnWebGPUCache\data_1
                    • Size 264KB
                    • SHA256 902f30c1fb0597d0734bc34b979ec5d131f8f39a4b71b338083821216ec8d61b
                    • MD5 SHA1 SHA512 SSDEEP

                    data_2

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\DawnWebGPUCache\data_2
                    • Size 8KB
                    • SHA256 ec1702806f4cc7c42a82fc2b38e89835fde7c64bb32060e0823c9077ca92efb7
                    • MD5 SHA1 SHA512 SSDEEP

                    data_3

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\DawnWebGPUCache\data_3
                    • Size 8KB
                    • SHA256 e09f42c398d688dce168570291f1f92d079987deda3099a34adb9e8c0522b30c
                    • MD5 SHA1 SHA512 SSDEEP

                    MANIFEST-000001

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\Extension Rules\MANIFEST-000001
                    • Size 41B
                    • SHA256 f9d31b278e215eb0d0e9cd709edfa037e828f36214ab7906f612160fead4b2b4
                    • MD5 SHA1 SHA512

                    SCT Auditing Pending Reports

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\Network\SCT Auditing Pending Reports
                    • Size 2B
                    • SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
                    • MD5 SHA1 SHA512

                    Preferences

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\Preferences
                    • Size 6KB
                    • SHA256 6c6c992c1ee5c91192f66fdaab5b8de9a6e7d0efa0d5f11765e2a43850041012
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    CURRENT

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Default\Site Characteristics Database\CURRENT
                    • Size 16B
                    • SHA256 0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443
                    • MD5 SHA1 SHA512

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 16KB
                    • SHA256 e63c3f79be83593ebe4bbe6effb40784b5be7134ebd5e98a7b7075978e248dc3
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 16KB
                    • SHA256 8fdd4520fc8a64fd2ed3add9b2678db583b9196467762af325f10cf0d684fcc9
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 1KB
                    • SHA256 c6317e13e0ff1e07b73b3f813e027bd9a518ca92dfdc53351226b2e63c695303
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 2KB
                    • SHA256 6c04a6b3453462224a79f5b93852fe670f44d72b826cf88846ebe2e80afadc7e
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 3KB
                    • SHA256 d713ca7ec899fb640885dc91dd5a3fd12ff72c5abf4df9d9caa0449ab5a09ba8
                    • MD5 SHA1 SHA512 TLSH

                    Local State

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State
                    • Size 16KB
                    • SHA256 9d00e72e538b61c7ea646a633c0032e39c46ebf140f968b8272c47f7025889ce
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Local State~RFe591f46.TMP

                    • Path C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe.WebView2\EBWebView\Local State~RFe591f46.TMP
                    • Size 1KB
                    • SHA256 8cedf4a18935a14bb3e94861373ade8b4fb566afa5ddb1c82d01298814c46586
                    • MD5 SHA1 SHA512 TLSH

                    Decompiler.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\bin\Decompiler.exe
                    • Size 9.4MB
                    • SHA256 fb5c5e11296f8cd6b552aa03daf760d99a380077ff92ba657d4d956af5f3d0f8
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Asterisk.png

                    • Path C:\Users\Admin\AppData\Local\Temp\bin\Editor\icons\Asterisk.png
                    • Size 530B
                    • SHA256 b4871218dc1c0ef58ff9e4a73676425df979504b8fc4da37040a15235ebc8de2
                    • MD5 SHA1 SHA512 TLSH

                    omega.png

                    • Path C:\Users\Admin\AppData\Local\Temp\bin\Editor\icons\omega.png
                    • Size 563B
                    • SHA256 6c784a9ee09700bbc0f60d6e820ae2ad55b50cfc4e6d9a4e75c198ded6bde297
                    • MD5 SHA1 SHA512 TLSH

                    monaco.html

                    • Path C:\Users\Admin\AppData\Local\Temp\bin\Editor\monaco.html
                    • Size 21KB
                    • SHA256 2cd7ec755b423a21d6dd3946614a107ebc918d9c40a948e32a5625d3b6bac270
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    WebView2Loader.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\runtimes\win-x64\native\WebView2Loader.dll
                    • Size 155KB
                    • SHA256 2d64a312551930dc56612cf358fcfd23133c0596a88c3ec1c467c392ff00b493
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/1300-31-0x0000029AA1C80000-0x0000029AA1C8E000-memory.dmp

                    memory/1300-192-0x0000029AA3820000-0x0000029AA382A000-memory.dmp

                    memory/1300-41-0x0000029AA6CA0000-0x0000029AA6CC2000-memory.dmp

                    memory/1300-40-0x0000029AA6BE0000-0x0000029AA6C94000-memory.dmp

                    memory/1300-193-0x0000029AA3840000-0x0000029AA3868000-memory.dmp

                    memory/1300-203-0x0000029AA38B0000-0x0000029AA38B8000-memory.dmp

                    memory/1300-39-0x0000029AA68F0000-0x0000029AA69B2000-memory.dmp

                    memory/1300-32-0x0000029AA1CA0000-0x0000029AA1D42000-memory.dmp

                    memory/1300-26-0x0000029A87290000-0x0000029A87630000-memory.dmp

                    memory/1300-30-0x0000029AA2AF0000-0x0000029AA2D0C000-memory.dmp

                    memory/1300-29-0x0000029A89170000-0x0000029A8917A000-memory.dmp

                    memory/1300-235-0x0000029AA38C0000-0x0000029AA38D8000-memory.dmp

                    memory/1300-28-0x0000029AA1D70000-0x0000029AA2152000-memory.dmp

                    memory/1300-234-0x0000029AA3830000-0x0000029AA383A000-memory.dmp

                    memory/1300-195-0x0000029AA3890000-0x0000029AA38AA000-memory.dmp

                    memory/1300-196-0x0000029AA3870000-0x0000029AA387A000-memory.dmp

                    memory/1300-194-0x0000029AA3880000-0x0000029AA3888000-memory.dmp

                    memory/2436-120-0x00007FFB3B700000-0x00007FFB3B701000-memory.dmp

                    memory/2436-121-0x00007FFB3BF80000-0x00007FFB3BF81000-memory.dmp

                    memory/3200-0-0x000001FCC67A0000-0x000001FCC682E000-memory.dmp

                    memory/3200-8-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-7-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-6-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-4-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-3-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-2-0x000001FCC83B0000-0x000001FCC83C0000-memory.dmp

                    memory/3200-1-0x000001FCE0C10000-0x000001FCE0C6E000-memory.dmp

                    memory/3836-181-0x00007FFB3C0E0000-0x00007FFB3C0E1000-memory.dmp

                    memory/4596-70-0x00007FFB3C0E0000-0x00007FFB3C0E1000-memory.dmp