alert dns $HOME_NET any -> any any (msg:"ET MALWARE XRatLocker/AiraCrop Ransomware Payment Domain"; dns_query; content:"6kaqkavhpu5dln6x"; depth:16; nocase; fast_pattern; reference:url,twitter.com/PolarToffee/status/796079699478900736; classtype:trojan-activity; sid:2023503; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_11_14, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_30, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)