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

7.0.35.0SID: 2043351Rev: 2Enabled1 views
Sourceet/open
Fileemerging-malware.rules
CreatedJanuary 19, 2023
UpdatedMarch 26, 2024
Classificationdomain-c2
alert dns $HOME_NET any -> any any (msg:"ET MALWARE BatLoader CnC Domain (externalchecksso .com) in DNS Lookup"; dns.query; bsize:20; content:"externalchecksso.com"; nocase; reference:url,www.trendmicro.com/en_us/research/23/a/batloader-malware-abuses-legitimate-tools-uses-obfuscated-javasc.html; classtype:domain-c2; sid:2043351; rev:2; metadata:created_at 2023_01_19, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26, reviewed_at 2025_07_14;)

References

urlwww.trendmicro.com/en_us/research/23/a/batloader-malware-abuses-legitimate-tools-uses-obfuscated-javasc.html

Metadata

created at2023_01_19
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_26
reviewed at2025_07_14

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