Rule History

SID: 2043345 • Source: et/open

Versions (7)

Version DetailsCurrent

Rev: 1 • Jan 19, 2023, 12:00 PM

Message:

ET MALWARE BatLoader CnC Domain (updatea1 .com) in DNS Lookup

Rule:

alert dns $HOME_NET any -> any any (msg:"ET MALWARE BatLoader CnC Domain (updatea1 .com) in DNS Lookup"; dns.query; content:"updatea1.com"; nocase; bsize:12; reference:url,www.trendmicro.com/en_us/research/23/a/batloader-malware-abuses-legitimate-tools-uses-obfuscated-javasc.html; classtype:domain-c2; sid:2043345; rev:1; metadata:created_at 2023_01_19, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_19, reviewed_at 2025_07_14;)

Created:

Jan 19, 2023, 12:00 PM

Updated:

Jan 19, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 26, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules