alert dns $HOME_NET any -> any any (msg:"ET MALWARE Xbash CnC DNS Lookup (3g2upl4pq6kufc4m .tk)"; dns.query; content:"3g2upl4pq6kufc4m.tk"; nocase; fast_pattern; endswith; reference:url,researchcenter.paloaltonetworks.com/2018/09/unit42-xbash-combines-botnet-ransomware-coinmining-worm-targets-linux-windows/; classtype:command-and-control; sid:2026335; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_and_Server, created_at 2018_09_20, deployment Perimeter, malware_family Xbash, performance_impact Low, confidence Medium, signature_severity Major, tag Coinminer, tag Worm, tag Destructive, tag FakeRansom, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)