alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/Nemucod requesting EXE payload 2016-02-01"; flow:established,to_server; flowbits:set,ET.nemucod.exerequest; http.method; content:"GET"; http.uri; content:".exe"; endswith; nocase; pcre:"/\/[0-9]{2}\.exe$/i"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,certego.net/en/news/italian-spam-campaigns-using-js-nemucod-downloader/; reference:md5,8bdc81393a4fcfaf6d1b8dc01486f2f0; classtype:trojan-activity; sid:2022482; rev:6; metadata:created_at 2016_02_03, malware_family JS_Nemucod, performance_impact Moderate, signature_severity Major, updated_at 2024_04_21;)