alert dns $HOME_NET any -> any any (msg:"ET MALWARE BlackTech Plead CnC in DNS Lookup"; dns.query; content:"ssmailer.com"; nocase; endswith; pcre:"/^[a-z0-9\-\.]{1,60}\.ssmailer\.com$/"; reference:url,www.welivesecurity.com/2019/05/14/plead-malware-mitm-asus-webstorage/; classtype:command-and-control; sid:2027362; rev:3; metadata:created_at 2019_05_17, deployment Perimeter, malware_family Plead, performance_impact Low, confidence High, signature_severity Major, tag APT, tag BlackTech, updated_at 2020_09_17;)