alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DCRat CnC Activity M11"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?data=active"; endswith; fast_pattern; pcre:"/^\/[a-z0-9]{45,60}\/[a-z0-9]{35,65}\/[a-z0-9]{38,60}\.php\?data=active$/U"; http.header_names; content:!"Referer"; content:!"User-Agent"; content:"Connection"; reference:md5,b478d340a787b85e086cc951d0696cb1; classtype:command-and-control; sid:2034739; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_15, deployment Perimeter, malware_family DCRat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14;)