Microsoft Office binary Located at: C:\Program Files (x86)\Microsoft Office 16\ClientX86\Root\Office16\ProtocolHandler.exe; C:\Program Files\Microsoft Office 16\ClientX64\Root\Office16\ProtocolHandler.exe; C:\Program Files (x86)\Microsoft Office\Office16\ProtocolHandler.exe.
protocolhandlerprotocolhandlerSandbox: execFile · Timeout: 30s
network.transfer.download Outputs
process.output Command execution output
network_traffic Produces
process.output| Resource | Value |
|---|---|
| CPU | low |
| Memory | 16 MB |
| Network | medium |
| Disk I/O | low |
Downloads payload from remote server (It will open the specified URL in the default web browser, which (if the URL points to a file) will often result in the file being downloaded to the user's Downloads folder (without user interaction))
ProtocolHandler.exe {REMOTEURL}| Type | Rule / Indicator |
|---|---|
| sigma | https://github.com/SigmaHQ/sigma/blob/b02e3b698afbaae143ac4fb36236eb0b41122ed7/rules/windows/process_creation/proc_creation_win_lolbin_protocolhandler_download.yml |
| ioc | Suspicious Office application Internet/network traffic |
protocolhandler is a Windows LOLBin. Microsoft Office binary Located at: C:\Program Files (x86)\Microsoft Office 16\ClientX86\Root\Office16\ProtocolHandler.exe; C:\Program Files\Microsoft Office 16\ClientX64\Root\Office16\ProtocolHandler.exe; C:\Program Files (x86)\Microsoft Office\Office16\ProtocolHandler.exe.