alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cayosin Botnet User-Agent Observed M2"; flow:established,to_server; http.user_agent; content:"Cock/2.0"; startswith; fast_pattern; endswith; classtype:trojan-activity; sid:2026877; rev:6; metadata:affected_product Linux, attack_target Server, created_at 2019_02_04, deployment Perimeter, malware_family Mirai, malware_family Cayosin, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_04_13;)