alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE XDMonitor Sending Debug Messages"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?usid="; fast_pattern; content:"&txt=00"; distance:0; pcre:"/^[0-9a-f]+$/R"; reference:url,vblocalhost.com/uploads/VB2020-Faou-Labelle.pdf; classtype:targeted-activity; sid:2030954; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_10_02, deployment Perimeter, malware_family XDSpy, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_02;)