alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED Generic Downloader Checkin Url Detected"; flow:established,to_server; content:"??IP|3a|"; depth:100; content:"??IP|3a|"; distance:0; content:"????|3a|"; distance:0; pcre:"/IP\:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/U"; classtype:trojan-activity; sid:2008766; rev:5; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)