alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Known Sinkhole Response Kryptos Logic"; flow:to_client,established; file.data; content:"<title>Sinkholed by Kryptos Logic"; fast_pattern; content:"<h1>Sinkholed!</h1><p>This domain has been sinkholed"; distance:0; classtype:misc-activity; sid:2031515; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_01_12, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_12;)