ET HUNTING Suspicious Empty SSL Certificate - Observed in Cobalt Strike
Sourceet/open
Fileemerging-hunting.rules
CreatedOctober 24, 2016
UpdatedMarch 27, 2024
Classificationtargeted-activity
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious Empty SSL Certificate - Observed in Cobalt Strike"; flow:established,to_client ; tls.cert_subject; bsize:25; content:"C=, ST=, L=, O=, OU=, CN=" ; endswith; fast_pattern; classtype:targeted-activity; sid:2023629; rev:7; 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 2024_03_27;)
Metadata
affected productAny
attack targetClient_Endpoint
created at2016_10_24
deploymentPerimeter
performance impactLow
confidenceMedium
signature severityMajor
updated at2024_03_27
Comments (0)
Please sign in to leave a comment.
Sign inNo comments yet. Be the first to comment!