alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Cobalt Group SSL Certificate Detected"; flow:established,from_server; tls.cert_subject; content:"dns-verifon.com"; reference:md5,26406f5cc72e13c798485f80ad3cbbdb; classtype:targeted-activity; sid:2025438; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_03_26, deployment Perimeter, malware_family Cobalt_Group, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_13;)