Rule History

SID: 2029257 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3 • Jan 13, 2020, 12:00 PM

Message:

ET INFO Observed Lets Encrypt Certificate for Suspicious TLD (.top)

Rule:

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Observed Lets Encrypt Certificate for Suspicious TLD (.top)"; flow:established,to_client; tls.cert_subject; content:".top"; endswith; tls.cert_issuer; content:"Lets Encrypt"; classtype:bad-unknown; sid:2029257; rev:3; metadata:created_at 2020_01_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_10_27;)

Created:

Jan 13, 2020, 12:00 PM

Updated:

Oct 27, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-info.rules