""ET EXPLOIT Apache Obfuscated log4j RCE Attempt (tcp ldap) (CVE-2021-44228)""

SID: 2034755

Revision: 1

Class Type: attempted-admin

Metadata: attack_target Server, created_at 2021_12_17, cve CVE_2021_44228, deployment Perimeter, signature_severity Major, 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

Reference:

  • cve

  • 2021-44228

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "|24 7b 24 7b|env|3a|NaN|3a|-j|7d|ndi|24 7b|env|3a|NaN|3a|"

  • Value: "|24 7b|env|3a|NaN|3a|-l|7d|dap|24|"

Within:

PCRE:

Special Options:

  • nocase

  • fast_pattern

source