alert dns $HOME_NET any -> any any (msg:"ET MALWARE Maldoc Related Domain in DNS Lookup"; dns.query; dotprefix; content:".openxmlformat.org"; nocase; endswith; reference:md5,d698fccf14f670595442155395f42642; reference:url,asec.ahnlab.com/ko/42233/; classtype:domain-c2; sid:2039806; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_11_18, deployment Perimeter, malware_family Maldoc, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_29;)