alert dns any any -> $HOME_NET any (msg:"ET HUNTING Windows Commands and Variables in DNS Reply"; content:"|00 10 00 01|"; offset:2; content:"|24|env|3a|"; fast_pattern; content:"copy|20|"; content:"cd|20|"; classtype:bad-unknown; sid:2038931; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_09_22, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_22;)