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Newest: 2.0.2
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Active Rule
Suspicious Creation of .library-ms File — Potential CVE-2025-24054 Exploit
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Creation of .library-ms File — Potential CVE-2025-24054 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: Suspicious Creation of .library-ms File — Potential CVE-2025-24054 Exploit
id: 5a7132c0-86db-4e6b-95c0-f0e9d7f461aa
status: experimental
description: |
Detects creation of '.library-ms' files, which may indicate exploitation of CVE-2025-24054. This vulnerability allows an attacker to trigger an automatic outbound SMB or WebDAV authentication request to a remote server upon archive extraction.
If the system is unpatched, no user interaction is required beyond extracting a malicious archive—potentially exposing the user's NTLMv2-SSP hash to the attacker.
references:
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24054
- https://research.checkpoint.com/2025/cve-2025-24054-ntlm-exploit-in-the-wild/
author: Gene Kazimiarovich
date: 2025-04-20
tags:
- detection.emerging-threats
- attack.credential-access
- attack.t1187 # Forced Authentication
- cve.2025-24054
logsource:
product: windows
category: file_event
detection:
selection:
TargetFilename|endswith: '.library-ms'
Image|endswith:
- '\7z.exe'
- '\winrar.exe'
- '\explorer.exe'
condition: selection
falsepositives:
- Legitimate Library shortcuts under %APPDATA%\Microsoft\Windows\Libraries\ (rarely created by end-users)
- Custom corporate scripts that programmatically generate .library-ms Files
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-2025-24054/file_event_win_exploit_cve_2025_24054_library_ms.yml