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.
OS-WINDOWS Microsoft Windows LSA authentication spoofing attempt
This rule looks for an authentication spoofing attempt that coerces Windows Server 2016 and 2019 authentication to fall back with high privileges when an attacker provides an empty/anonymous username when trying to access the server via SMB2 protocol.
This rule looks for an authentication spoofing attempt in vulnerable Windows Server 2016 or 2019
No public information
No known false positives
Cisco Talos Intelligence Group
No rule groups
An Authentication Bypass occurs when there is a way to avoid providing user credentials to a system before performing restricted operations on said system.