Query: Sigma YAML for windows / file_event
Matching passage: Sigma rule: Detects creation of new ".dll" files inside the plugins directory of a notepad++ installation by a process other than "g. Logsource: windows / file_event. Rule: title: Potential Persistence Via Notepad++ Plugins id: 54127bd4-f541-4ac3-afdb-ea073f63f692 status: test description: Detects creation of new ".dll" files inside the plugins directory of a notepad++ installation by a process other than "gup.exe". Which could indicates possible persistence references: - https://pentestlab.blog/2022/02/14/persistence-notepad-plugins/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-06-10 modified: 2025-09-01 tags: - attack.persistence logsource: product: windows category: file_event detection: selection: TargetFilename|contains: \Notepad++\plugins\ TargetFilename|endswith: .dll filter_gup: Image|endswith: \Notepad++\updater\gup.exe filter_install: Image|startswith: C:\Users\ Image|contains: \AppData\Local\Temp\ Image|endswith: - \target.exe - Installer.x64.exe filter_main_installer: Image|contains: \npp. Image|endswith: .exe TargetFilename: - C:\Program Files\Notepad++\plugins\NppExport\NppExport.dll - C:\Program Files\Notepad++\plugins\mimeTools\mimeTools.dll - C:\Program Files\Notepad++\plugins\NppConverter\NppConverter.dll - C:\Program Files\Notepad++\plugins\Config\nppPluginList.dll condition: selection and not 1 of filter_* falsepositives: - Possible FPs during first installation of Notepad++ - Legitimate use of custom plugins by users in order to enhance notepad++ functionalities level: medium
Near-miss passage: Sigma rule: Detects the load of RstrtMgr DLL (Restart Manager) by an uncommon process. This library has been used during ransomware. Logsource: windows / image_load. Rule: title: Load Of RstrtMgr.DLL By An Uncommon Process id: 3669afd2-9891-4534-a626-e5cf03810a61 related: - id: b48492dc-c5ef-4572-8dff-32bc241c15c8 type: derived status: test description: 'Detects the load of RstrtMgr DLL (Restart Manager) by an uncommon process. This library has been used during ransomware campaigns to kill processes that would prevent file encryption by locking them (e.g. Conti ransomware, Cactus ransomware). It has also recently been seen used by the BiBi wiper for Windows. It could also be used for anti-analysis purposes by shut downing specific processes. ' references: - https://www.crowdstrike.com/blog/windows-restart-manager-part-1/ - https://www.crowdstrike.com/blog/windows-restart-manager-part-2/ - https://web.archive.org/web/20231221193106/https://www.swascan.com/cactus-ransomware-malware-analysis/ - https://taiwan.postsen.com/business/88601/Hamas-hackers-use-data-destruction-software-BiBi-which-consumes-a-lot-of-processor-resources-to-wipe-Windows-computer-data--iThome.html author: Luc Génaux date: 2023-11-28 modified: 2026-07-28 tags: - attack.impact - attack.defense-impairment - attack.t1486 - attack.t1685 logsource: category: image_load product: windows detection: selection: - ImageLoaded|endswith: \RstrtMgr.dll - OriginalFileName: RstrtMgr.dll filter_main_generic: Image|startswith: - C:\$WINDOWS.~BT\ - C:\$WinREAgent\ - C:\Program Files (x86)\ - C:\Program Files\ - C:\ProgramData\ - C:\Windows\explorer.exe - C:\Windows\SoftwareDistribution\ - C:\Windows\SysNative\ - C:\Windows\System32\ - C:\Windows\SysWOW64\ - C:\Windows\WinSxS\ - C:\WUDownloadCache\ filter_main_user_software_installations: Image|startswith: C:\Users\ Image|contains|all: - \AppData\Local\Temp\is- - .tmp\ Image|endswith: .tmp filter_main_admin_software_installations: Image|startswith: C:\Windows\Temp\ filter_optional_onedrive_1: Image|startswith: C:\Users\ Image|endswith: - \AppData\Local\Microsoft\OneDrive\OneDrive.exe - \AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe filter_optional_onedrive_2: Image|startswith: C:\Users\ Image|contains: \AppData\Local\Microsoft\OneDrive\ Image|endswith: \OneDrive.Sync.Service.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Other legitimate Windows processes not currently listed - Processes related to software installation level: low