Rule History

SID: 2066473 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Dec 26, 2025, 12:00 PM

Message:

ET MALWARE Observed DNS Query to XWorm Payload Delivery Domain

Rule:

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to XWorm Payload Delivery Domain"; dns.query; bsize:49; content:"09c1d5c3-1a6e-4c05-8e4e-eff75c6b5dd6.usrfiles.com"; nocase; reference:md5,c1961e2c5b2e2dc6c431723ec26ce5ba; classtype:trojan-activity; sid:2066473; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_12_26, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_12_26;)

Created:

Dec 26, 2025, 12:00 PM

Updated:

Dec 26, 2025, 12:00 PM

DB Created:

Dec 26, 2025, 6:34 PM

DB Updated:

Dec 29, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules