alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED m28sx twitter worm redirect access"; flow:established,to_server; content:"/undo/red.php"; http_uri; content:"Host|3a| gdfgdfgdgdfgdfg.in.ua"; nocase; http_header; reference:url,isc.sans.edu/diary.html?storyid=10297; classtype:trojan-activity; sid:2012209; rev:2; metadata:created_at 2011_01_21, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)