Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself. (such as?)

Alert Message

OS-WINDOWS Microsoft Windows potential Device Guard evasion via Jscript9 scripting engine attempt

Rule Explanation

This event is generated when an attacker attempts to exploit a security feature bypass vulnerability in Microsoft Windows Impact: Details: Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework



For reference, see the MITRE ATT&CK vulnerability types here:


Additional Links

Rule Vulnerability

CVE Additional Information

A security feature bypass vulnerability exists in Microsoft JScript that could allow an attacker to bypass Device Guard, aka "Microsoft JScript Security Feature Bypass Vulnerability." This affects Windows Server 2016, Windows 10, Windows Server 2019, Windows 10 Servers.
Severity Base Score5.3
Impact Score3.4 Exploit Score1.8
Confidentiality ImpactLOW Integrity ImpactLOW
Availability ImpactLOW Access Vector
Authentication Ease of Access