Query: Sigma rule for Detects MSI package installation from suspicious locations
Matching passage: Sigma rule: Detects MSI package installation from suspicious locations. Logsource: windows / application. Rule: title: MSI Installation From Suspicious Locations id: c7c8aa1c-5aff-408e-828b-998e3620b341 status: test description: Detects MSI package installation from suspicious locations references: - https://www.trendmicro.com/en_us/research/22/h/ransomware-actor-abuses-genshin-impact-anti-cheat-driver-to-kill-antivirus.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-08-31 modified: 2023-10-23 tags: - attack.execution logsource: product: windows service: application detection: selection: Provider_Name: MsiInstaller EventID: - 1040 - 1042 Data|contains: - :\Windows\TEMP\ - \\\\ - \Desktop\ - \PerfLogs\ - \Users\Public\ filter_winget: Data|contains: \AppData\Local\Temp\WinGet\ filter_updhealthtools: Data|contains: C:\Windows\TEMP\UpdHealthTools.msi condition: selection and not 1 of filter_* falsepositives: - False positives may occur if you allow installation from folders such as the desktop, the public folder or remote shares. A baseline is required before production use. level: medium
Near-miss passage: Sigma rule: Detects the execution of obfuscated PowerShell commands that attempt to install MSI packages via the Windows Installer C. Logsource: windows / process_creation. Rule: title: Obfuscated PowerShell MSI Install via WindowsInstaller COM id: 7b6a7418-3afc-11f0-aff4-000d3abf478c status: experimental description: 'Detects the execution of obfuscated PowerShell commands that attempt to install MSI packages via the Windows Installer COM object (`WindowsInstaller.Installer`). The technique involves manipulating strings to hide functionality, such as constructing class names using string insertion (e.g., ''indowsInstaller.Installer''.Insert(0,''W'')) and correcting malformed URLs (e.g., converting ''htps://'' to ''https://'') at runtime. This behavior is commonly associated with malware loaders or droppers that aim to bypass static detection by hiding intent in runtime-generated strings and using legitimate tools for code execution. The use of `InstallProduct` and COM object creation, particularly combined with hidden window execution and suppressed UI, indicates an attempt to install software (likely malicious) without user interaction. ' references: - https://informationsecuritybuzz.com/the-real-danger-behind-a-simple-windows-shortcut/ - https://redcanary.com/blog/threat-intelligence/intelligence-insights-may-2025/ - https://www.virustotal.com/gui/file/f9710b0ba4de5fa0e7ec27da462d4d2fc6838eba83a19f23f6617a466bbad457 author: Meroujan Antonyan (vx3r) date: 2025-05-27 tags: - attack.stealth - attack.t1027.010 - attack.t1218.007 - attack.execution - attack.t1059.001 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \powershell_ise.exe - \powershell.exe - \pwsh.exe - OriginalFileName: - PowerShell_ISE.EXE - PowerShell.EXE - pwsh.dll selection_cli: CommandLine|contains|all: - -ComObject - InstallProduct( - .Insert( - UILevel condition: all of selection_* falsepositives: - Unknown level: high