alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Sundown EK Landing Apr 20 2015"; flow:established,from_server; file_data; content:"|27 3b|d=unescape(m)|3b|document.write(d|29 3b|</script>"; content:".swf"; nocase; content:".swf"; nocase; content:"vbscript"; nocase; content:"System.Net.WebClient"; nocase; content:".exe"; nocase; classtype:exploit-kit; sid:2020950; rev:3; metadata:created_at 2015_04_21, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)