alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/SVCReady Loader CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?zs="; fast_pattern; content:"&t="; isdataat:!2,relative; pcre:"/\.php\?zs=[A-F0-9]{8}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{12}&t=[0-9]{1,2}$/Usi"; http.header_names; content:!"Referer"; content:!"Accept-"; reference:md5,e4430c33d343d9f4af57225b90600a3d; reference:md5,1036e57d1c8cde25a6680430354aa801; classtype:trojan-activity; sid:2036856; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_27, deployment Perimeter, malware_family SVCReady, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_27, reviewed_at 2024_03_08;)