Query: Sigma rule for Detects creation of new ".dll" files inside the plugins directory of a notepad++ installation by a process other than "g
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: Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers comm. Logsource: windows / process_creation. Rule: title: Potential Browser Data Stealing id: 47147b5b-9e17-4d76-b8d2-7bac24c5ce1b related: - id: fc028194-969d-4122-8abe-0470d5b8f12f type: derived status: test description: 'Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers commonly save credentials such as website usernames and passwords so that they do not need to be entered manually in the future. Web browsers typically store the credentials in an encrypted format within a credential store. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1555.003/T1555.003.md - https://www.cisa.gov/sites/default/files/2024-04/aa24-109a-stopransomware-akira-ransomware_2.pdf author: Nasreddine Bencherchali (Nextron Systems) date: 2022-12-23 modified: 2025-03-19 tags: - attack.credential-access - attack.t1555.003 logsource: category: process_creation product: windows detection: selection_cmd: - CommandLine|contains: - copy-item - 'copy ' - 'cpi ' - ' cp ' - 'move ' - move-item - ' mi ' - ' mv ' - Image|endswith: - \esentutl.exe - \xcopy.exe - \robocopy.exe - OriginalFileName: - esentutl.exe - XCOPY.EXE - robocopy.exe selection_path: CommandLine|contains: - \Amigo\User Data - \BraveSoftware\Brave-Browser\User Data - \CentBrowser\User Data - \Chromium\User Data - \CocCoc\Browser\User Data - \Comodo\Dragon\User Data - \Elements Browser\User Data - \Epic Privacy Browser\User Data - \Google\Chrome Beta\User Data - \Google\Chrome SxS\User Data - \Google\Chrome\User Data\ - \Kometa\User Data - \Maxthon5\Users - \Microsoft\Edge\User Data - \Mozilla\Firefox\Profiles - \Nichrome\User Data - \Opera Software\Opera GX Stable\ - \Opera Software\Opera Neon\User Data - \Opera Software\Opera Stable\ - \Orbitum\User Data - \QIP Surf\User Data - \Sputnik\User Data - \Torch\User Data - \uCozMedia\Uran\User Data - \Vivaldi\User Data condition: all of selection_* falsepositives: - Unknown level: medium