Versions (5)
Version DetailsCurrent
Rev: 5 • Feb 12, 2014, 12:00 PMET MALWARE Possible Sinkhole banner
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Sinkhole banner"; flow:established,to_client; http.header; content:"Server|3a 20|You got served|21|"; reference:url,community.emc.com/community/connect/rsaxchange/netwitness/blog/2013/12/30/detecting-sinkholed-domains-in-your-environment; classtype:trojan-activity; sid:2018117; rev:5; metadata:created_at 2014_02_12, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_12;)
Feb 12, 2014, 12:00 PM
Jul 12, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Nov 7, 2025, 9:34 PM
rules/emerging-malware.rules