Versions (3)
Version DetailsCurrent
Rev: 1 • Sep 16, 2024, 12:00 PMET INFO Observed Observed Abused File Sharing Service Domain (secret .ist .ie in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed Observed Abused File Sharing Service Domain (secret .ist .ie in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".secret.ist.ie"; endswith; fast_pattern; classtype:misc-activity; sid:2055850; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_09_16, deployment Perimeter, confidence High, signature_severity Informational, tag TA_Abused_Service, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_16;)
Sep 16, 2024, 12:00 PM
Sep 16, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Jul 28, 2025, 9:34 PM
rules/emerging-info.rules