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Rev: 3 • Dec 12, 2021, 12:00 PMET EXPLOIT Possible Apache log4j RCE Attempt - 2021/12/12 Obfuscation Observed M2 (tcp) (CVE-2021-44228)
alert tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Possible Apache log4j RCE Attempt - 2021/12/12 Obfuscation Observed M2 (tcp) (CVE-2021-44228)"; flow:established,to_server; stream_size:client,<,10000; content:"|24 7b|"; content:"|24 7b 3a 3a|"; within:100; fast_pattern; reference:cve,2021-44228; classtype:attempted-admin; sid:2034673; rev:3; metadata:attack_target Server, created_at 2021_12_12, cve CVE_2021_44228, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_01_11, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)
Dec 12, 2021, 12:00 PM
Jan 11, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-exploit.rules