alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Likely Evil Macro EXE DL mar 15 2016"; flow:established,to_server; http.uri; content:"/image/"; depth:7; content:".exe"; endswith; fast_pattern; pcre:"/^\/image\/(?:data|flags)\/[^\x2f]+\.exe$/i"; http.header_names; content:!"Referer"; classtype:trojan-activity; sid:2022622; rev:7; metadata:created_at 2016_03_16, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_05_01;)