Rule History

SID: 2068211 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Mar 13, 2026, 12:00 PM

Message:

ET MALWARE Observed DNS Query to TA402 Domain (iwsmailserver .com)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to TA402 Domain (iwsmailserver .com)"; dns.query; dotprefix; content:".iwsmailserver.com"; nocase; endswith; reference:url,www.proofpoint.com/us/blog/threat-insight/iran-conflict-drives-heightened-espionage-activity-against-middle-east-targets; classtype:trojan-activity; sid:2068211; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_13, deployment Perimeter, confidence High, signature_severity Major, tag TA402, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_13;)

Created:

Mar 13, 2026, 12:00 PM

Updated:

Mar 13, 2026, 12:00 PM

DB Created:

Mar 13, 2026, 8:34 PM

DB Updated:

Mar 15, 2026, 2:34 AM

Filename:

rules/emerging-malware.rules