Query: detect Detects uncommon or suspicious child processes spawning from a VsCode "code.exe" process. This could indicate an attempt in logs
Matching passage: Sigma rule: Detects uncommon or suspicious child processes spawning from a VsCode "code.exe" process. This could indicate an attempt. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Child Process Of VsCode id: 5a3164f2-b373-4152-93cf-090b13c12d27 status: test description: Detects uncommon or suspicious child processes spawning from a VsCode "code.exe" process. This could indicate an attempt of persistence via VsCode tasks or terminal profiles. references: - https://twitter.com/nas_bench/status/1618021838407495681 - https://twitter.com/nas_bench/status/1618021415852335105 author: Nasreddine Bencherchali (Nextron Systems) date: 2023-01-26 modified: 2023-10-25 tags: - attack.execution - attack.stealth - attack.t1218 - attack.t1202 logsource: category: process_creation product: windows detection: selection_parent: ParentImage|endswith: \code.exe selection_children_images: Image|endswith: - \calc.exe - \regsvr32.exe - \rundll32.exe - \cscript.exe - \wscript.exe selection_children_cli: Image|endswith: - \powershell.exe - \pwsh.exe - \cmd.exe CommandLine|contains: - Invoke-Expressions - IEX - Invoke-Command - ICM - DownloadString - rundll32 - regsvr32 - wscript - cscript selection_children_paths: Image|contains: - :\Users\Public\ - :\Windows\Temp\ - :\Temp\ condition: selection_parent and 1 of selection_children_* falsepositives: - In development environment where VsCode is used heavily. False positives may occur when developers use task to compile or execute different types of code. Remove or add processes accordingly level: medium
Near-miss passage: Sigma rule: Detects uncommon "userinit.exe" child processes, which could be a sign of uncommon shells or login scripts used for pers. Logsource: windows / process_creation. Rule: title: Uncommon Userinit Child Process id: 0a98a10c-685d-4ab0-bddc-b6bdd1d48458 related: - id: 21d856f9-9281-4ded-9377-51a1a6e2a432 type: similar status: test description: Detects uncommon "userinit.exe" child processes, which could be a sign of uncommon shells or login scripts used for persistence. references: - https://cocomelonc.github.io/persistence/2022/12/09/malware-pers-20.html - https://learn.microsoft.com/en-us/windows-server/administration/server-core/server-core-sconfig#powershell-is-the-default-shell-on-server-core author: Tom Ueltschi (@c_APT_ure), Tim Shelton date: 2019-01-12 modified: 2023-11-14 tags: - attack.privilege-escalation - attack.t1037.001 - attack.persistence logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: \userinit.exe filter_main_explorer: Image|endswith: :\WINDOWS\explorer.exe filter_optional_logonscripts: CommandLine|contains: - netlogon.bat - UsrLogon.cmd filter_optional_windows_core: CommandLine: PowerShell.exe filter_optional_proquota: Image|endswith: - :\Windows\System32\proquota.exe - :\Windows\SysWOW64\proquota.exe filter_optional_citrix: Image|endswith: - :\Program Files (x86)\Citrix\HDX\bin\cmstart.exe - :\Program Files (x86)\Citrix\HDX\bin\icast.exe - :\Program Files (x86)\Citrix\System32\icast.exe - :\Program Files\Citrix\HDX\bin\cmstart.exe - :\Program Files\Citrix\HDX\bin\icast.exe - :\Program Files\Citrix\System32\icast.exe filter_optional_image_null: Image: null condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate logon scripts or custom shells may trigger false positives. Apply additional filters accordingly. level: high