Versions (4)
Version DetailsCurrent
Rev: 1 • Jan 16, 2024, 12:00 PMET INFO Observed File Sharing Service Domain (drive .filen .io in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed File Sharing Service Domain (drive .filen .io in TLS SNI)"; flow:established,to_server; tls.sni; bsize:14; content:"drive.filen.io"; fast_pattern; classtype:bad-unknown; sid:2050075; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_01_16, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_16; target:src_ip;)
Jan 16, 2024, 12:00 PM
Jan 16, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 15, 2025, 8:34 PM
rules/emerging-info.rules