ET POLICY Observed External IP Lookup Domain (ipconfig .cf in TLS SNI)

SID: 2027919Rev: 30 viewsHistory

Sourceet/open

CreatedAugust 26, 2019

UpdatedSeptember 17, 2020

Classificationexternal-ip-check

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed External IP Lookup Domain (ipconfig .cf in TLS SNI)"; flow:established,to_server; tls.sni; content:"ipconfig.cf"; endswith; classtype:external-ip-check; sid:2027919; rev:3; metadata:attack_target Client_Endpoint, created_at 2019_08_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag IP_address_lookup_website, updated_at 2020_09_17, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)

Metadata

attack targetClient_Endpoint

created at2019_08_26

deploymentPerimeter

performance impactLow

confidenceHigh

signature severityInformational

tagIP_address_lookup_website

updated at2020_09_17

mitre tactic idTA0007

mitre tactic nameDiscovery

mitre technique idT1614

mitre technique nameSystem_Location_Discovery

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