alert tcp $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE Zbot Variant SSL cert for whoismama.ru"; flow:established,to_client; content:"www.whoismama.ru"; fast_pattern; nocase; reference:md5,cca1713888b0534954234cf31dd5a7d4; classtype:trojan-activity; sid:2017940; rev:3; metadata:attack_target Client_Endpoint, created_at 2014_01_08, deployment Perimeter, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2019_10_08;)