alert http1 $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE AntiVirus exe Download Likely FakeAV Install"; flow:established,to_client; http.header; content:"|0d 0a|Content-Disposition|3a 20|attachment|3b 20|filename=|22|"; content:"AntiVirus"; fast_pattern; within:24; nocase; content:".exe"; within:24; classtype:trojan-activity; sid:2013827; rev:10; metadata:created_at 2011_11_05, confidence Medium, signature_severity Major, updated_at 2024_05_06;)