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?)
OS-WINDOWS Microsoft Windows Netlogon crafted NetrServerReqChallenge elevation of privilege attempt
This rule looks for repeated NetrServerReqChallenge 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.
No public information
No known false positives
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:
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