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Detection rules › Sigma

CVE-2021-21978 Exploitation Attempt

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

Detects the exploitation of the VMware View Planner vulnerability described in CVE-2021-21978

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1190 Exploit Public-Facing Application

Rule body yaml

title: CVE-2021-21978 Exploitation Attempt
id: 77586a7f-7ea4-4c41-b19c-820140b84ca9
status: test
description: Detects the exploitation of the VMware View Planner vulnerability described in CVE-2021-21978
references:
    - https://twitter.com/wugeej/status/1369476795255320580
    - https://paper.seebug.org/1495/
author: Bhabesh Raj
date: 2020-03-10
modified: 2023-01-02
tags:
    - attack.initial-access
    - attack.t1190
    - cve.2021-21978
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains|all:
            - 'logupload'
            - 'logMetaData'
            - 'wsgi_log_upload.py'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    cs-method: 'POST'
    cs-uri-query|contains|all:
        - 'logupload'
        - 'logMetaData'
        - 'wsgi_log_upload.py'

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
  • POST
cs-uri-querymatch
  • logMetaData
  • logupload
  • wsgi_log_upload.py