alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MedusaHTTP Variant CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".jsp"; endswith; http.user_agent; content:"Mozilla/5.0 (X11|3b 20|Ubuntu|3b 20|Linux i686|3b 20|rv|3a|45.0) Gecko/20100101 Firefox/45.0"; fast_pattern; endswith; http.request_body; content:"abc="; depth:4; pcre:"/^[a-z0-9/%=]{100,}$/Ri"; reference:url,www.arbornetworks.com/blog/asert/medusahttp-ddos-slithers-back-spotlight; classtype:command-and-control; sid:2027861; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_13, deployment Perimeter, malware_family MedusaHTTP, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_17;)