alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ClickFraud Trojan Socks5 Init Response"; flow:established,from_server; flowbits:isset,ET.2018855; dsize:6<>9; content:"|fe|"; depth:1; content:"|1f|"; distance:4; within:1; reference:md5,de31e17ff4b3791c92a93b72d779e61f; classtype:trojan-activity; sid:2018941; rev:2; metadata:created_at 2014_08_14, signature_severity Major, updated_at 2019_07_26;)