alert tcp any any -> $HOME_NET [23,2323] (msg:"ET EXPLOIT Actiontec C1000A backdoor account M2"; flow:established,to_server; content:"CenturyL1nk"; fast_pattern; classtype:attempted-admin; sid:2024980; rev:3; metadata:affected_product Linux, attack_target IoT, created_at 2017_11_13, deployment Perimeter, malware_family Mirai, performance_impact Low, confidence Low, signature_severity Critical, updated_at 2019_07_26;)