Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE SysJoker Related Domain in DNS Lookup (office360-update .com)"; dns.query; content:"office360-update.com"; nocase; bsize:20; reference:url,www.intezer.com/blog/malware-analysis/new-backdoor-sysjoker/; classtype:trojan-activity; sid:2034926; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_14, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_14;)