Versions (4)
Version DetailsCurrent
Rev: 2 • Feb 1, 2023, 12:00 PMET MALWARE Observed DNS Query to IcedID Domain (headertolz .com)
alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to IcedID Domain (headertolz .com)"; dns.query; content:"headertolz.com"; nocase; bsize:14; classtype:trojan-activity; sid:2044060; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_02_01, deployment Perimeter, deprecation_reason Age, malware_family IcedID, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_07;)
Feb 1, 2023, 12:00 PM
Mar 7, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 25, 2025, 9:35 PM
rules/emerging-malware.rules