Rule History

SID: 2051768 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 1 • Mar 22, 2024, 12:00 PM

Message:

ET INFO Observed Cloudflare Developer Domain (workers .dev) in TLS SNI

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed Cloudflare Developer Domain (workers .dev) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".workers.dev"; endswith; fast_pattern; classtype:misc-activity; sid:2051768; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2024_03_22, deployment Perimeter, malware_family Cloudflare_Workers, performance_impact Low, confidence High, signature_severity Informational, tag Cloudflare_Workers, updated_at 2024_03_22;)

Created:

Mar 22, 2024, 12:00 PM

Updated:

Mar 22, 2024, 12:00 PM

DB Created:

Mar 22, 2024, 10:00 PM

DB Updated:

Mar 6, 2026, 10:34 PM

Filename:

rules/emerging-info.rules