alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT_NGO_wuaclt C2 Check-in"; flow:to_server,established; http.uri; content:"/news/show.asp?id1="; fast_pattern; http.user_agent; content:"Mozilla/4.0 |28|compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1|3b 20|SV1"; startswith; reference:url,labs.alienvault.com; classtype:targeted-activity; sid:2016572; rev:4; metadata:created_at 2013_03_14, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;)