ProtocolHandler.exe

Downloads payload from remote server

Use 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}

Evidence

Upstream reference

Environment

Local host

Context

user

Native

Download

MITRE

T1105

Detection

Sigma: github.com/SigmaHQ/sigma/blob/b02e3b698afbaae143ac4fb36236eb0b41122ed7/rules/windows/process_creation/proc_creation_win_lolbin_protocolhandler_download.yml

IOC: Suspicious Office application Internet/network traffic

Refs

lolbas-project.github.io/lolbas/OtherMSBinaries/ProtocolHandler/