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Convert indexed Sigma rules into analyst-ready detections.

This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a live sigma-cli backend, then reveal pipelines only when you actually need them.

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Indexed Rules

3,707

Ready to search

Backends

17

Live from sigconverter.io

CLI Versions

10

Newest: 2.0.2

Translation Workspace

Shape the rule before it leaves Phoenix

Tune Translation

Active Rule

CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Exploit

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Exploit

Using Splunk · Default · sigma-cli 2.0.2

Translation controls

Adjust the rule on the left, then regenerate when you want a fresh backend-native query.

BackendSplunkFormatDefaultVersion2.0.2
title: CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Exploit
id: fcbb4a77-f368-4945-b046-4499a1da69d1
status: test
description: Detects an authentication bypass vulnerability affecting the REST API URLs in ADSelfService Plus (CVE-2021-40539).
references:
    - https://therecord.media/cisa-warns-of-zoho-server-zero-day-exploited-in-the-wild/
    - https://www.manageengine.com/products/self-service-password/kb/how-to-fix-authentication-bypass-vulnerability-in-REST-API.html
    - https://us-cert.cisa.gov/ncas/alerts/aa21-259a
author: Sittikorn S, Nuttakorn Tungpoonsup
date: 2021-09-10
modified: 2023-01-02
tags:
    - attack.initial-access
    - attack.t1190
    - attack.persistence
    - attack.t1505.003
    - cve.2021-40539
    - detection.emerging-threats
logsource:
    category: webserver
    definition: 'Must be collect log from \ManageEngine\ADSelfService Plus\logs'
detection:
    selection:
        cs-uri-query|contains:
            - '/help/admin-guide/Reports/ReportGenerate.jsp'
            - '/RestAPI/LogonCustomization'
            - '/RestAPI/Connection'
    condition: selection
falsepositives:
    - Unknown
level: critical

CLI command

Copy the exact command to reproduce this translation locally.

sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2021/Exploits/CVE-2021-40539/web_cve_2021_40539_manageengine_adselfservice_exploit.yml