alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE VPNFilter htpx Module C2 Request"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"curl53"; depth:6; fast_pattern; endswith; http.header_names; content:"Host|0d 0a|Accept|0d 0a|User-Agent|0d 0a 0d 0a|"; reference:url,blog.talosintelligence.com/2018/09/vpnfilter-part-3.html; classtype:command-and-control; sid:2026429; rev:4; metadata:affected_product Linux, attack_target Networking_Equipment, created_at 2018_10_01, deployment Perimeter, malware_family VPNFilter, confidence High, signature_severity Major, updated_at 2020_09_16;)