alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/SilentBreak Related Domain in DNS Lookup"; dns.query; content:"opswat.info"; nocase; bsize:11; reference:url,securelist.com/a-new-secret-stash-for-fileless-malware/106393/; classtype:domain-c2; sid:2036555; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_05_10, deployment Perimeter, malware_family Win32_SilentBreak, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_10;)