ET INFO Observed External IP Lookup Domain (icanhazip .com in TLS SNI)

7.0.35.0SID: 2036304Rev: 2Enabled2 views
Sourceet/open
Fileemerging-info.rules
CreatedApril 22, 2022
UpdatedMarch 26, 2024
Classificationexternal-ip-check
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed External IP Lookup Domain (icanhazip .com in TLS SNI)"; flow:established,to_server; tls.sni; bsize:13; content:"icanhazip.com"; fast_pattern; classtype:external-ip-check; sid:2036304; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_04_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2024_03_26, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)

Metadata

attack targetClient_Endpoint
created at2022_04_22
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityInformational
updated at2024_03_26
mitre tactic idTA0007
mitre tactic nameDiscovery
mitre technique idT1614
mitre technique nameSystem_Location_Discovery

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