Rule History

SID: 2015898 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 6 • Nov 20, 2012, 12:00 PM

Message:

ET HUNTING Suspicious Windows NT version 1 User-Agent

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Windows NT version 1 User-Agent"; flow:established,to_server; http.user_agent; content:"Windows NT 1"; nocase; content:!"0"; within:1; pcre:"/^[^0-9]/R"; classtype:bad-unknown; sid:2015898; rev:6; metadata:created_at 2012_11_20, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_18;)

Created:

Nov 20, 2012, 12:00 PM

Updated:

Apr 18, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Nov 11, 2025, 10:34 PM

Filename:

rules/emerging-hunting.rules