Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/Nemucod requesting EXE payload 2015-12-01"; flow:to_server,established; flowbits:set,ET.nemucod.exerequest; http.method; content:"GET"; http.uri; content:".exe?"; fast_pattern; nocase; pcre:"/\/[0-9]{2}\.exe\?[0-9]$/i"; http.user_agent; content:"MSIE 7.0"; http.header_names; content:!"Referer|0d 0a|"; nocase; http.header; content:!"User-Agent|3a 20|BlueCoat"; nocase; reference:url,www.certego.net/en/news/italian-spam-campaigns-using-js-nemucod-downloader/; reference:md5,77290f994d05ad0add5768c9c040dc55; classtype:trojan-activity; sid:2022207; rev:6; metadata:created_at 2015_12_02, malware_family JS_Nemucod, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_09;)