alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Bapy.Downloader PE Download Request"; flow:established,to_server; urilen:9; http.method; content:"GET"; http.uri; content:"/tmps."; fast_pattern; pcre:"/[a-z]\d{2}$/"; http.header_names; content:!"Accept-"; content:!"Referer|0d 0a|"; reference:md5,e256976cedda8c9d07a21ca0e5c2f86c; classtype:trojan-activity; sid:2019127; rev:4; metadata:created_at 2014_09_05, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_25;)