ET INFO Observed URL Shortening Service Domain (surl .li in TLS SNI)
Sourceet/open
Fileemerging-info.rules
CreatedFebruary 9, 2023
UpdatedMarch 27, 2024
Classificationmisc-activity
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; bsize:7; content:"surl.li"; fast_pattern; classtype:misc-activity; sid:2044150; rev:3; 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 2024_03_27;)
Metadata
attack targetClient_Endpoint
created at2023_02_09
deploymentPerimeter
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_27
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