alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT MVPower DVR Shell UCE"; flow:established,to_server; http.uri; content:"/shell?"; startswith; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,researchcenter.paloaltonetworks.com/2018/07/unit42-finds-new-mirai-gafgyt-iotlinux-botnet-campaigns/; classtype:attempted-admin; sid:2025883; rev:6; metadata:affected_product Linux, attack_target IoT, created_at 2018_07_23, deployment Perimeter, malware_family Mirai, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_02;)