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Rev: 1 • Dec 11, 2021, 12:00 PMET HUNTING Possible Apache log4j RCE Attempt - Any Protocol (upper TCP Bypass) (CVE-2021-44228)
alert tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol (upper TCP Bypass) (CVE-2021-44228)"; flow:established,to_server; content:"|24 7b|jndi|3a|"; nocase; fast_pattern; content:"|24 7b|upper|3a|"; distance:0; reference:cve,2021-44228; classtype:misc-activity; sid:2034663; rev:1; metadata:created_at 2021_12_11, cve CVE_2021_44228, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_11;)
Dec 11, 2021, 12:00 PM
Dec 11, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 8, 2025, 9:34 PM
rules/emerging-hunting.rules