alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Likely Arid Viper APT Advtravel Campaign GET Keepalive";
flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:"/index.php/customer/onlin"; fast_pattern;
http.user_agent;
content:"Internet Explorer"; bsize:17;
http.header_names;
content:!"Referer|0d 0a|";
reference:url,www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-operation-arid-viper.pdf;
classtype:targeted-activity;
sid:2020432; rev:7;
metadata:created_at 2015_02_17, confidence Medium, signature_severity Major, updated_at 2020_09_29;
)