Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Observed Fake Updates/Login Domain (security-check-... in TLS SNI)"; flow:established,to_server; tls.sni; content:"security-check-"; startswith; fast_pattern; reference:url,urlscan.io/search/#page.domain%3A*security-check-*%20AND%20page.status%3A200; classtype:misc-activity; sid:2062220; rev:1; metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2025_05_09, deployment Perimeter, confidence Medium, signature_severity Informational, tag AI_Generated_Description, updated_at 2025_05_09; target:src_ip;)