alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Agent.ATS CnC Activity"; flow:established,to_server; http.uri; content:"php?Hwid=S-"; fast_pattern; content:"-"; distance:0; content:"-"; distance:0; content:"-"; distance:0; pcre:"/\.php\?Hwid=[^&]+[0-9](?:&(?:Pc|Etat)=[^&]+)?(?:&user=[^&]+&Ip=[^&]+&Ping=[^&]+&v=[^&]+&Ville=[^&]+&Pays=[^&]+&Region=[^&]+)?$/i"; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,53d3ee595bc5df7e97403906f1415c21; classtype:command-and-control; sid:2024528; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_08, deployment Perimeter, malware_family MSIL_Agent_ATS, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_11;)