alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/Dorv InfoStealer CnC DNS Query"; dns.query; content:"googleservice-info.ru"; nocase; endswith; reference:md5,888864c2ea27babf978d5feda40b3b2f; reference:url,twitter.com/wdsecurity/status/1105992405629583362; classtype:command-and-control; sid:2027088; rev:3; metadata:attack_target Client_Endpoint, created_at 2019_03_18, deployment Perimeter, malware_family Win32_Dorv, performance_impact Low, confidence High, signature_severity Major, tag Stealer, updated_at 2020_09_16;)