Detection rules › Sigma

CVE-2024-1709 - ScreenConnect Authentication Bypass Exploitation

Status
test
Severity
critical
Log source
category webserver
Author
Matt Anderson, Huntress
Source
github.com/SigmaHQ/sigma

Detects GET requests to '/SetupWizard.aspx/[anythinghere]' that indicate exploitation of the ScreenConnect vulnerability CVE-2024-1709.

MITRE ATT&CK coverage

TacticTechniques
Initial AccessNo specific technique
PersistenceNo specific technique

Rule body yaml

title: CVE-2024-1709 - ScreenConnect Authentication Bypass Exploitation
id: d27eabad-9068-401a-b0d6-9eac744d6e67
status: test
description: |
    Detects GET requests to '/SetupWizard.aspx/[anythinghere]' that indicate exploitation of the ScreenConnect vulnerability CVE-2024-1709.
references:
    - https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8
    - https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypass
    - https://www.cve.org/CVERecord?id=CVE-2024-1709
author: Matt Anderson, Huntress
date: 2024-02-20
tags:
    - attack.initial-access
    - attack.persistence
    - cve.2024-1709
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-uri-stem|contains: '/SetupWizard.aspx/'
    condition: selection
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    cs-uri-stem|contains: '/SetupWizard.aspx/'

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-uri-stemmatch
  • /SetupWizard.aspx/