alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT DRIVEBY EXE Embeded in Page Likely Evil M1"; flow:established,to_client; file.data; content:"vbscript"; nocase; content:"|22|4D5A90"; fast_pattern; nocase; content:!"|22|"; within:500; pcre:"/^[a-f0-9]{500}/Rsi"; classtype:trojan-activity; sid:2020893; rev:3; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2015_04_11, deployment Perimeter, confidence High, signature_severity Minor, tag DriveBy, updated_at 2024_03_14;)