ET HUNTING Suspicious Empty SSL Certificate - Observed in Cobalt Strike
Sourceet/open
CreatedOctober 24, 2016
UpdatedMarch 24, 2022
Classificationtargeted-activity
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious Empty SSL Certificate - Observed in Cobalt Strike"; flow:from_server,established; tls.cert_subject; content:"C=, ST=, L=, O=, OU=, CN="; endswith; bsize:25; fast_pattern; classtype:targeted-activity; sid:2023629; rev:5; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2016_10_24, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2022_03_24;)
Metadata
affected productAny
attack targetClient_Endpoint
created at2016_10_24
deploymentPerimeter
performance impactLow
confidenceMedium
signature severityMajor
updated at2022_03_24
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