alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Plasmabot CnC Host Checkin"; flow:to_server,established; http.method; content:"POST"; http.request_body; content:"crypt="; depth:6; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; content:!"User-Agent|0d 0a|"; reference:url,blogs.mcafee.com/mcafee-labs/plasma-http-botnet-steals-stored-passwords-chrome-filezilla; reference:md5,ffbf380abaa7c56b45edd2784feecf36; classtype:command-and-control; sid:2018393; rev:5; metadata:created_at 2014_04_16, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_27;)