alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Python/PBot Browser Hijacker Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".js?streamId="; fast_pattern; content:"&isAdvpp="; distance:0; content:".js?streamId="; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})&isAdvpp=(?:true|false)$/Rsi"; http.header; content:"|0d 0a|Origin|3a 20|http"; reference:md5,f741a2febf0630407ba17945362f3bce; classtype:trojan-activity; sid:2031148; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_10_30, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_10_30;)