Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE DNS Query to IcedID Domain (simipimi .com)"; dns.query; bsize:12; content:"simipimi.com"; nocase; reference:url,thedfirreport.com/2023/05/22/icedid-macro-ends-in-nokoyawa-ransomware/; classtype:trojan-activity; sid:2045854; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_05_24, deployment Perimeter, deprecation_reason Relevance, malware_family IcedID, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_08, reviewed_at 2024_05_08;)