alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA406 Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?vw="; fast_pattern; content:"&nv="; within:7; http.user_agent; content:"powershell/"; nocase; http.header_names; content:!"Referer"; reference:md5,d2ed41719424bb024535afa1b2d17f3a; classtype:trojan-activity; sid:2048041; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_09_12, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_12, reviewed_at 2023_09_12; target:src_ip;)