alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Possible HTTP GET Deep Panda C2 Activity"; flow:established,to_server; content:"GET"; http_method; content:".jpg?id="; http_uri; fast_pattern:only; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\.jpg\?id=\d+$/U"; reference:md5,5acc539355258122f8cdc7f5c13368e1; classtype:command-and-control; sid:2020379; rev:2; metadata:created_at 2015_02_06, signature_severity Unknown, updated_at 2019_07_26;)