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.
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
Cisco Duo Successful MFA Authentication Via Bypass Code
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Cisco Duo Successful MFA Authentication Via Bypass Code
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: Cisco Duo Successful MFA Authentication Via Bypass Code
id: 6f7e1c10-2dc9-4312-adb6-9574ff09a5c8
status: test
description: |
Detects when a successful MFA authentication occurs due to the use of a bypass code.
A bypass code is a temporary passcode created by an administrator for a specific user to access a Duo-protected application. These are generally used as "backup codes," so that enrolled users who are having problems with their mobile devices (e.g., mobile service is disrupted, the device is lost or stolen, etc.) or who temporarily can't use their enrolled devices (on a plane without mobile data services) can still access their Duo-protected systems.
references:
- https://duo.com/docs/adminapi#logs
- https://help.duo.com/s/article/6327?language=en_US
author: Nikita Khalimonenkov
date: 2024-04-17
tags:
- attack.credential-access
- attack.defense-evasion
- attack.initial-access
logsource:
product: cisco
service: duo
detection:
selection:
event_type: authentication
reason: bypass_user
condition: selection
falsepositives:
- Legitimate user that was assigned on purpose to a bypass group
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/identity/cisco_duo/cisco_duo_mfa_bypass_via_bypass_code.yml