alert dns $HOME_NET any -> any any (msg:"ET INFO Lockbit Ransomware Related Domain in DNS Lookup (decoding .at)"; dns.query; content:"decoding.at"; nocase; bsize:11; fast_pattern; reference:url,unit42.paloaltonetworks.com/emerging-ransomware-groups/; classtype:bad-unknown; sid:2033860; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_09_01, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_01, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)