alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE SSL/TLS Certificate Observed (StrongPity)"; flow:established,to_client; tls.cert_subject; content:"CN=vps.server.com"; tls.cert_issuer; content:"CN=vps.server.com"; tls.cert_serial; content:"00:B2:51:A1:E9:9C:0E:FB:8B"; fast_pattern; reference:url,www.alienvault.com/blogs/labs-research/newly-identified-strongpity-operations; classtype:trojan-activity; sid:2027720; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_16, deployment Perimeter, confidence High, signature_severity Major, tag StrongPity, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;)