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

SID: 2036304Rev: 10 viewsHistory

Sourceet/open

CreatedApril 22, 2022

UpdatedApril 22, 2022

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; content:"icanhazip.com"; bsize:13; fast_pattern; classtype:external-ip-check; sid:2036304; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_04_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_04_22, 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 at2022_04_22

mitre tactic idTA0007

mitre tactic nameDiscovery

mitre technique idT1614

mitre technique nameSystem_Location_Discovery

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