Suspicious Chromium Browser Instance Executed With Custom Extension

Detects a suspicious process spawning a Chromium based browser process with the 'load-extension' flag to start an instance with a custom extension

Detection logic

Platform: Linux macOS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source category: process_creation

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
emkc.org/s/RJjuLa	Unclassified	2
redcanary.com/blog/chromeloader/	Security research	2
www.mandiant.com/resources/blog/lnk-between-browsers	Threat report	3