Versions (6)
Version DetailsCurrent
Rev: 1 • Dec 17, 2021, 12:00 PMET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (CVE-2021-44228)
alert tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (CVE-2021-44228)"; flow:established,to_server; content:"|24 7b 24 7b|env|3a|NaN|3a|-j|7d|ndi|24 7b|env|3a|NaN|3a|"; nocase; fast_pattern; content:"|24 7b|env|3a|NaN|3a|-l|7d|dap|24|"; reference:url,twitter.com/bad_packets/status/1471253695459332102; reference:cve,2021-44228; classtype:attempted-admin; sid:2034755; rev:1; metadata:attack_target Server, created_at 2021_12_17, cve CVE_2021_44228, deployment Perimeter, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_17, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)
Dec 17, 2021, 12:00 PM
Dec 17, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 8, 2025, 9:34 PM
rules/emerging-exploit.rules