alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Infostealer.Banprox Proxy.pac Download 3"; flow:from_server,established; file_data; content:"FindProxyForURL"; fast_pattern; distance:0; content:"return |22|PROXY"; pcre:"/^[^\x3b]+\\x(?:[57][0-9a]|4[0-9a-f]|6[1-9a-f]|3[0-9])/Ri"; reference:md5,6f2dc4ba05774f3e5ebf6c502db48a71; classtype:trojan-activity; sid:2019191; rev:13; metadata:created_at 2014_09_18, signature_severity Major, updated_at 2019_07_26;)