Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value btst"; flow:established,to_client; http.cookie; content:"btst="; startswith; fast_pattern; pcre:"/^[a-f0-9]{32}\x7c\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\x7c/R"; threshold:type limit, count 1, seconds 300, track by_src; classtype:trojan-activity; sid:2037771; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_07_15, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_19, reviewed_at 2023_09_01;)