Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (surl .li in TLS SNI)"; flow:established,to_server; tls.sni; content:"surl.li"; bsize:7; fast_pattern; classtype:misc-activity; sid:2044150; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_02_09, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_31;)