alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SCAN Tomato Router Default Credentials (admin:admin)"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"/admin-scripts.asp"; nocase; http.header; content:"Authorization|3a 20|Basic|20|YWRtaW46YWRtaW4="; fast_pattern; reference:url,unit42.paloaltonetworks.com/muhstik-botnet-attacks-tomato-routers-to-harvest-new-iot-devices/; classtype:attempted-admin; sid:2029317; rev:2; metadata:attack_target Networking_Equipment, created_at 2020_01_23, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_23;)