alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE UpDocX Download"; flow:established,to_server; http.uri; content:"/WINWORD32.exe"; fast_pattern; http.header_names; content:!"Referer"; reference:url,pwc.blogs.com/cyber_security_updates/2015/06/unfin4ished-business.html; classtype:trojan-activity; sid:2021377; rev:5; metadata:created_at 2015_07_02, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_01;)