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.

Alert Message

OS-WINDOWS Microsoft Windows malformed NTLMv2 authentication message attempt

Rule Explanation

This event is generated when there is an authentication bypass attempt via NTLMv2 relay attack. Impact: Attempted User Privilege Gain Details: Event is triggered upon a malicious NTLMv2 Challenge sent from a proxy to a client machine in an attempt to steal a valid session key. This will allow the relayer to use the stolen session key to recalculate MIC and authenticate to the target server. Ease of Attack:

What To Look For

No information provided

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

No rule groups

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.
CVE-2019-1019
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