alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Malicious VBS Downloader fake image zip"; flow:to_server,established; http.method; content:"GET"; http.uri; content:".zip"; endswith; nocase; fast_pattern; pcre:"/\.(?:gif|jpe?g)\.zip$/i"; http.content_type; content:"text/plain|3b 20|Charset=UTF-8"; bsize:25; reference:md5,7b678a25c533652dbb0c2a2ac37cf1e3; classtype:trojan-activity; sid:2022334; rev:4; metadata:created_at 2016_01_06, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_05;)