ET INFO Observed External IP Lookup Domain (whois .pconline .com .cn in TLS SNI)

SID: 2047622Rev: 12 viewsHistory

Sourceet/open

CreatedAugust 11, 2023

UpdatedAugust 11, 2023

Classificationexternal-ip-check

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed External IP Lookup Domain (whois .pconline .com .cn in TLS SNI)"; flow:established,to_server; tls.sni; bsize:21; content:"whois.pconline.com.cn"; fast_pattern; classtype:external-ip-check; sid:2047622; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_08_11, reviewed_at 2024_03_11, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)

Metadata

attack targetClient_Endpoint

created at2023_08_11

deploymentPerimeter

performance impactLow

confidenceHigh

signature severityInformational

updated at2023_08_11

reviewed at2024_03_11

mitre tactic idTA0007

mitre tactic nameDiscovery

mitre technique idT1614

mitre technique nameSystem_Location_Discovery

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