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 Netlogon crafted NetrServerAuthenticate elevation of privilege attempt

Rule Explanation

This rule looks for repeated NetrServerAuthenticate requests sent to a Netlogon server within a short amount of time, which indicates an attacker may be trying to exploit this vulnerability and bypass Netlogon authentication.

What To Look For

This rule looks for an attempt to exploit CVE-2020-1472, an elevation of privilege vulnerability in Netlogon authentication handling.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Privilege Escalation

Technique: Exploitation for Privilege Escalation

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

Rule Vulnerability

Escalation of Privilege

An Escalation of Privilege (EOP) attack is any attack method that results in a user or application gaining permissions to access resources they normally would not have access to.

CVE Additional Information