msedgewebview2.exe

Commands

1. ExecuteLow privileges T1218.015

   Proxy execution of binary

   msedgewebview2.exe --no-sandbox --browser-subprocess-path="{PATH_ABSOLUTE:.exe}"

   This command launches the Microsoft Edge WebView2 browser control without sandboxing and will spawn the specified executable as its subprocess.

   os: Windows 10, Windows 11

   Execute: EXE

2. ExecuteUser T1218.015

   Proxy execution of binary

   msedgewebview2.exe --utility-cmd-prefix="{CMD}"

   This command launches the Microsoft Edge WebView2 browser control without sandboxing and will spawn the specified command as its subprocess.

   os: Windows 10, Windows 11

   Execute: CMD

3. ExecuteUser T1218.015

   Proxy execution of binary

   msedgewebview2.exe --disable-gpu-sandbox --gpu-launcher="{CMD}"

   This command launches the Microsoft Edge WebView2 browser control without sandboxing and will spawn the specified command as its subprocess.

   os: Windows 10, Windows 11

   Execute: CMD

4. ExecuteUser T1218.015

   Proxy execution of binary

   msedgewebview2.exe --no-sandbox --renderer-cmd-prefix="{CMD}"

   This command launches the Microsoft Edge WebView2 browser control without sandboxing and will spawn the specified command as its subprocess.

   os: Windows 10, Windows 11

   Execute: CMD

Detection

• Sigma https://github.com/SigmaHQ/sigma/blob/e1a713d264ac072bb76b5c4e5f41315a015d3f41/rules/windows/process_creation/proc_creation_win_susp_electron_execution_proxy.yml
• IOCmsedgewebview2.exe spawned with any of the following: --gpu-launcher, --utility-cmd-prefix, --renderer-cmd-prefix, --browser-subprocess-path

Resources

• https://medium.com/@MalFuzzer/one-electron-to-rule-them-all-dc2e9b263daf