Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Possible EXE Download From Suspicious TLD (.icu) - set"; flow:established,to_server; flowbits:set,ET.SuspExeTLDs; flowbits:noalert; http.host; content:".icu"; fast_pattern; endswith; reference:url,www.spamhaus.org/statistics/tlds/; classtype:misc-activity; sid:2026891; rev:2; metadata:attack_target Client_Endpoint, created_at 2019_02_06, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_27;)