SID 1:64196

Rule Category

BROWSER-PLUGINS -- Snort has detected suspicious browser plugin traffic, likely targeting the ActiveX plugin in Internet Explorer, though this could apply to any browser. Attackers have refined techniques to smuggle extensions into the Chrome Web Store, which they can then modify remotely once downloaded to add or activate malicious or spyware features. This can be similar to a Potentially Unwanted Application, as valuable data and network access is often allowed on a phone or browser without proper investigation. Some extensions also mimic more well-known and trusted ones (AdBlock, etc.)

Alert Message

BROWSER-PLUGINS Microsoft Windows Message System ActiveX function call access

Rule Explanation

This rule looks for files containing attempts to access the Microsoft Windows Message System ActiveX function.

What To Look For

This rule fires on attempts to access the Microsoft Windows Message System ActiveX function.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group