alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Kuluoz/Asprox CnC Response"; flow:from_server,established; flowbits:isset,ET.Kuluoz; content:"|0d 0a 0d 0a|"; content:"|0d 0a 80 00 00 00|"; distance:2; within:6; reference:md5,a3e0f51356d48124fba25485d1871b28; reference:url,www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-asprox-reborn.pdf; reference:url,blog.fortinet.com/post/changes-in-the-asprox-botnet; classtype:command-and-control; sid:2019187; rev:5; metadata:created_at 2014_09_17, signature_severity Major, updated_at 2019_07_26;)