alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nymaim.BA CnC M1"; flow:to_server,established; http.method; content:"POST"; http.uri; content:!"/"; offset:1; content:!"|2e|"; pcre:"/^\/[a-z0-9]+\?[a-z0-9]+(?:=[a-z0-9&=]+)?$/i"; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/"; http.header; content:".in|0d 0a|User-Agent|3a 20|"; fast_pattern; content:"Cache-Control|3a 20|no-cache"; content:"Pragma|3a 20|no-cache"; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; content:!"Content-Type|0d 0a|"; reference:md5,3831e58cd22cc9bdf06f18f843cdfee9; reference:url,techhelplist.com/spam-list/974-intuit-browsers-update-malware; classtype:command-and-control; sid:2022119; rev:3; metadata:created_at 2015_11_19, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_09;)