alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/MysterySnail RAT CnC Domain in DNS Lookup"; dns.query; content:"http.ddspadus.com"; nocase; bsize:17; reference:url,securelist.com/mysterysnail-attacks-with-windows-zero-day/104509/; reference:md5,e2f2d2832da0facbd716d6ad298073ca; classtype:domain-c2; sid:2034197; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_15, deployment Perimeter, malware_family Win32_MysterySnail, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_15;)