alert dns $HOME_NET any -> any any (msg:"ET DNS APT_NGO_wuaclt C2 Domain micorsofts.com"; dns.query; content:"micorsofts.com"; endswith; fast_pattern; threshold:type limit, track by_src, count 1, seconds 300; reference:url,labs.alienvault.com; classtype:targeted-activity; sid:2016570; rev:4; metadata:created_at 2013_03_14, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26;)