alert dns $HOME_NET any -> any any (msg:"ET MALWARE WebMonitor/RevCode RAT CnC Domain in DNS Lookup"; dns.query; dotprefix; content:".wm01.to"; nocase; endswith; reference:url,unit42.paloaltonetworks.com/unit42-say-cheese-webmonitor-rat-comes-c2-service-c2aas/; reference:md5,b44898666f0f07e9fae379b6e88a331c; reference:md5,e91bbe677636002682dbcc430fc1065b; classtype:domain-c2; sid:2032361; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_04_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_01;)