alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Dridex/Bugat/Feodo POST Checkin"; flow:established,to_server; http.method; content:"POST"; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Connection|0d 0a|"; content:!"Referer|0d 0a|"; http.header; content:"Content-Length|3a 20|59|0d 0a|Host|3a 20|"; startswith; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\x3a\d{1,5})?$/"; http.uri; pcre:"/^\/[\/a-z0-9]+$/i"; reference:md5,2ddb6cb347eb7939545a1801c72f1f3f; classtype:command-and-control; sid:2018771; rev:8; metadata:created_at 2014_07_24, signature_severity Major, updated_at 2024_04_14;)