alert dns any any -> $HOME_NET any (msg:"ET MALWARE Wapack Labs Sinkhole DNS Reply"; content:"|00 01 00 01|"; content:"|00 04 17 FD 2E 40|"; distance:4; within:6; classtype:trojan-activity; sid:2021022; rev:3; metadata:created_at 2015_04_28, deprecation_reason Age, confidence High, signature_severity Major, updated_at 2024_04_19, reviewed_at 2024_04_19;)