Phoenix Studio

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

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Backends

Live from sigconverter.io

CLI Versions

Newest: 2.0.2

Translation Workspace

Shape the rule before it leaves Phoenix

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Active Rule

OWASSRF Exploitation Attempt Using Public POC - Proxy

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

OWASSRF Exploitation Attempt Using Public POC - Proxy

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: OWASSRF Exploitation Attempt Using Public POC - Proxy
id: fdd7e904-7304-4616-a46a-e32f917c4be4
status: test
description: Detects exploitation attempt of the OWASSRF variant targeting exchange servers using publicly available POC. It uses the OWA endpoint to access the powershell backend endpoint
references:
    - https://www.crowdstrike.com/blog/owassrf-exploit-analysis-and-recommendations/
    - https://www.rapid7.com/blog/post/2022/12/21/cve-2022-41080-cve-2022-41082-rapid7-observed-exploitation-of-owassrf-in-exchange-for-rce/
    - https://twitter.com/purp1ew0lf/status/1602989967776808961?s=12&t=OkZJl_ViICeiftVEsohRyw
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-12-22
tags:
    - attack.initial-access
    - attack.t1190
    - detection.emerging-threats
logsource:
    category: proxy
detection:
    selection:
        # Look for the header: X-OWA-ExplicitLogonUser: owa/mastermailbox@outlook.com
        c-useragent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.5195.54 Safari/537.36'
        cs-method: 'POST'
        sc-status: 200
        c-uri|contains|all:
            - '/owa/mastermailbox'
            - '/powershell'
    condition: selection
falsepositives:
    - Unlikely
level: critical

CLI command

Copy the exact command to reproduce this translation locally.

sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2022/Exploits/CVE-2022-41082/proxy_cve_2022_36804_exchange_owassrf_poc_exploitation.yml