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Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
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pySigma Versions
10
Newest: 1.3.3
Translation Workspace
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Active Rule
Commvault QLogin with PublicSharingUser and GUID Password (CVE-2025-57788)
Target Profile
Splunk
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Format Mode
Default
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Conversion Output
Commvault QLogin with PublicSharingUser and GUID Password (CVE-2025-57788)
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: Commvault QLogin with PublicSharingUser and GUID Password (CVE-2025-57788)
id: 917789e1-2c1f-4bf5-8c91-6f71a017f469
status: experimental
description: |
Detects a qlogin.exe command attempting to authenticate as the internal `_+_PublicSharingUser_` using a GUID as the password.
This could be an indicator of an attacker exploiting CVE-2025-57788 to gain initial access using leaked credentials.
references:
- https://labs.watchtowr.com/guess-who-would-be-stupid-enough-to-rob-the-same-vault-twice-pre-auth-rce-chains-in-commvault/
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-10-20
tags:
- attack.privilege-escalation
- attack.persistence
- attack.defense-evasion
- attack.initial-access
- attack.t1078.001
- detection.emerging-threats
- cve.2025-57788
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains|all:
- 'qlogin'
- '_+_PublicSharingUser_'
# Detects the use of a GUID as the password, which is indicative of an exploit attempt
CommandLine|re: '[A-F0-9]{8}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{4}-[A-F0-9]{12}'
condition: selection
falsepositives:
- Legitimate administrative scripts that use the `_+_PublicSharingUser_` account for valid purposes.
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2025/Exploits/CVE-2025-57788/proc_creation_win_exploit_cve_2025_57788.yml