Rule History

alert tcp $HOME_NET any -> any any (msg:"ET HUNTING Possible Apache log4j RCE Attempt - Any Protocol (lower TCP Bypass) (Outbound) (CVE-2021-44228)"; flow:established,to_server; content:"|24 7b|jndi|3a|"; nocase; fast_pattern; content:"|24 7b|lower|3a|"; distance:0; reference:cve,2021-44228; classtype:misc-activity; sid:2034802; rev:2; metadata:attack_target Server, created_at 2021_12_18, cve CVE_2021_44228, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2021_12_18, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)