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Detection rules › Sigma

Oracle WebLogic Exploit CVE-2021-2109

Status
test
Severity
critical
Log source
category webserver
Author
Bhabesh Raj
Source
github.com/SigmaHQ/sigma

Detects the exploitation of the WebLogic server vulnerability described in CVE-2021-2109

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1190 Exploit Public-Facing Application

Rule body yaml

title: Oracle WebLogic Exploit CVE-2021-2109
id: 687f6504-7f44-4549-91fc-f07bab065821
status: test
description: Detects the exploitation of the WebLogic server vulnerability described in CVE-2021-2109
references:
    - https://twitter.com/pyn3rd/status/1351696768065409026
    - https://mp.weixin.qq.com/s/wX9TMXl1KVWwB_k6EZOklw
author: Bhabesh Raj
date: 2021-01-20
modified: 2023-01-02
tags:
    - attack.t1190
    - attack.initial-access
    - cve.2021-2109
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains|all:
            - 'com.bea.console.handles.JndiBindingHandle'
            - 'ldap://'
            - 'AdminServer'
    condition: selection
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    cs-method: 'GET'
    cs-uri-query|contains|all:
        - 'com.bea.console.handles.JndiBindingHandle'
        - 'ldap://'
        - 'AdminServer'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
cs-methodeq
  • GET
cs-uri-querymatch
  • AdminServer
  • com.bea.console.handles.JndiBindingHandle
  • ldap://