alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT DRIVEBY EXE Embeded in Page Likely Evil M2"; flow:established,from_server; file_data; content:"vbscript"; nocase; content:"|27|4D5A90"; fast_pattern; nocase; content:!"|27|"; within:500; pcre:"/^[a-f0-9]{500}/Rsi"; classtype:trojan-activity; sid:2020894; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2015_04_11, deployment Perimeter, confidence Medium, signature_severity Major, tag DriveBy, updated_at 2019_07_26;)