alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE VoidRay Downloader CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?UID="; fast_pattern; content:"_"; distance:8; within:1; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept|0d 0a|"; reference:md5,082b7a27b2e75bbcde189fab82b0fe72; classtype:trojan-activity; sid:2031649; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_02_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_23;)