alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Napolar.A Getting URL"; flow:established,to_server; http.method; content:"GET"; http.user_agent; bsize:108; content:"Mozilla/5.0 (Windows NT 6.1|3b| WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.71 Safari/537.36"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept|0d 0a|"; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith; reference:md5,9a8cee88d7440f25be8404b71cb584de; reference:md5,b70f8d0afa82c222f55f7a18d2ad0b81; classtype:trojan-activity; sid:2017362; rev:4; metadata:created_at 2013_08_21, malware_family Win32_Napolar_A, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)