alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nemucod JS Downloader Aug 01 2017"; flow:established,to_server; http.uri; pcre:"/\/[A-Za-z0-9]{5,9}\?+[A-Za-z0-9]{6,12}=[A-Za-z0-9]{6,12}$/"; http.header; strip_pseudo_headers; header_lowercase; content:"accept|3a 20 2a 2f 2a 0d 0a|accept-language|3a|"; startswith; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.0)"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"cookie|0d 0a|"; reference:md5,cb558b04216e0e7a9c936945ebee6611; classtype:trojan-activity; sid:2024508; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_01, deployment Perimeter, malware_family Nemucod, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_05_04;)