alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Zbot download config - SET"; flow:established,to_server; flowbits:set,ET.zbot.dat; flowbits:noalert; http.method; content:"GET"; http.uri; content:".dat"; endswith; http.header_names; to_lowercase; content:!"|0d 0a|content-type|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; classtype:trojan-activity; sid:2022317; rev:4; metadata:created_at 2015_12_30, signature_severity Major, updated_at 2024_04_20;)