Rule History

SID: 2068405 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Mar 24, 2026, 12:00 PM

Message:

ET MALWARE Observed DNS Query to RMM Payload Delivery Domain (mail-srv .com)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to RMM Payload Delivery Domain (mail-srv .com)"; dns.query; dotprefix; content:".mail-srv.com"; nocase; endswith; classtype:trojan-activity; sid:2068405; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_24, deployment Perimeter, confidence High, signature_severity Major, tag RMM, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_24;)

Created:

Mar 24, 2026, 12:00 PM

Updated:

Mar 24, 2026, 12:00 PM

DB Created:

Mar 24, 2026, 9:34 PM

DB Updated:

Mar 25, 2026, 8:34 PM

Filename:

rules/emerging-malware.rules