ET INFO Observed URL Shortening Service Domain (appurl .io in TLS SNI)
Sourceet/open
CreatedSeptember 25, 2023
UpdatedSeptember 25, 2023
Classificationbad-unknown
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed URL Shortening Service Domain (appurl .io in TLS SNI)"; flow:established,to_server; tls.sni; bsize:9; content:"appurl.io"; fast_pattern; classtype:bad-unknown; sid:2048228; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_09_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_25, reviewed_at 2024_04_29;)
Metadata
attack targetClient_Endpoint
created at2023_09_25
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2023_09_25
reviewed at2024_04_29
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