alert udp $HOME_NET any -> $HOME_NET 7 (msg:"ET DELETED Ryuk Wake-on-LAN Packet Observed"; dsize:<200; content:"|ff ff ff ff ff ff|"; startswith; fast_pattern; pcre:"/^(?P<mac_addr>[\x00-\xff]{6})(?P=mac_addr){2,}$/R"; reference:url,www.crowdstrike.com/blog/wizard-spider-adds-new-feature-to-ryuk-ransomware/; classtype:command-and-control; sid:2028943; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_11_05, deployment Internal, malware_family Ransomware, malware_family Ryuk, performance_impact Moderate, signature_severity Major, updated_at 2019_11_08;)