Rule History

SID: 2034830 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Dec 21, 2021, 12:00 PM

Message:

ET ATTACK_RESPONSE DNS Query for Observed CVE-2021-44228 Callback Domain (log .exposedbotnets .ru)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET ATTACK_RESPONSE DNS Query for Observed CVE-2021-44228 Callback Domain (log .exposedbotnets .ru)"; dns.query; dotprefix; content:".log.exposedbotnets.ru"; nocase; endswith; reference:cve,2021-44228; classtype:domain-c2; sid:2034830; rev:1; 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 2021_12_21;)

Created:

Dec 21, 2021, 12:00 PM

Updated:

Dec 21, 2021, 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