Rule History

SID: 2034831 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 2 • Dec 21, 2021, 12:00 PM

Message:

ET ATTACK_RESPONSE DNS Query for Observed CVE-2021-44228 Security Scanner Domain (log4j. leakix .net)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET ATTACK_RESPONSE DNS Query for Observed CVE-2021-44228 Security Scanner Domain (log4j. leakix .net)"; dns.query; content:"log4j.leakix.net"; nocase; endswith; reference:cve,2021-44228; reference:url,twitter.com/VessOnSecurity/status/1473414886533304322; classtype:domain-c2; sid:2034831; rev:2; metadata:attack_target Client_and_Server, created_at 2021_12_21, cve CVE_2021_44228, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_04;)

Created:

Dec 21, 2021, 12:00 PM

Updated:

Jan 4, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 8, 2025, 9:34 PM

Filename:

rules/emerging-attack_response.rules