alert http $EXTERNAL_NET any -> any any (msg:"ET EXPLOIT Citrix NetScaler SD-WAN 9.1.2.26.561201 Devices CVE-2017-6316 (Inbound)"; flow:established,to_server; urilen:13; http.method; content:"POST"; http.uri; content:"/global_data/"; fast_pattern; http.cookie; content:"`"; content:"http"; distance:0; reference:url,unit42.paloaltonetworks.com/mirai-variant-echobot-resurfaces-with-13-previously-unexploited-vulnerabilities/; reference:cve,2017-6316; classtype:attempted-admin; sid:2029165; rev:2; metadata:affected_product Linux, attack_target IoT, created_at 2019_12_16, cve CVE_2017_6316, deployment Perimeter, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_26;)