alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Trojan-Downloader.Win32.AutoIt.mj Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"/downloads/IPFilter.exe"; nocase; endswith; http.user_agent; content:"AutoIt"; depth:6; reference:md5,c4e923564c564163620959f23691cc26; reference:md5,4a77d3575845cf24b72400816d0b95c2; classtype:command-and-control; sid:2016844; rev:4; metadata:created_at 2013_05_14, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_24;)