Query: alert when Detects suspicious registry modifications made by suspicious processes such as script engine processes such as WScript,
Matching passage: Sigma rule: Detects suspicious registry modifications made by suspicious processes such as script engine processes such as WScript,. Logsource: windows / registry_event. Rule: title: Registry Tampering by Potentially Suspicious Processes id: 7f4c43f9-b1a5-4c7d-b24a-b41bf3a3ebf2 related: - id: 2a0a169d-cc66-43ce-9ae2-6e678e54e46a type: similar - id: 921aa10f-2e74-4cca-9498-98f9ca4d6fdf type: similar status: experimental description: 'Detects suspicious registry modifications made by suspicious processes such as script engine processes such as WScript, or CScript etc. These processes are rarely used for legitimate registry modifications, and their activity may indicate an attempt to modify the registry without using standard tools like regedit.exe or reg.exe, potentially for evasion and persistence. ' references: - https://www.nextron-systems.com/2025/07/29/detecting-the-most-popular-mitre-persistence-method-registry-run-keys-startup-folder/ - https://www.linkedin.com/posts/mauricefielenbach_livingofftheland-redteam-persistence-activity-7344801774182051843-TE00/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-08-13 modified: 2026-04-14 tags: - attack.persistence - attack.execution - attack.defense-impairment - attack.t1112 - attack.t1059.005 logsource: category: registry_event product: windows detection: selection: Image|endswith: - \mshta.exe - \wscript.exe - \cscript.exe filter_main_binary_data: Details: Binary Data filter_main_null: Details: null filter_main_wscript_legit_1: Image|endswith: \wscript.exe TargetObject|contains: - SOFTWARE\Microsoft\Windows NT\CurrentVersion\Notifications\Data\ - \Services\bam\State\UserSettings\S-1- - Software\Microsoft\Windows Script\Settings\Telemetry\wscript.exe\ - Software\Microsoft\Windows\CurrentVersion\Internet Settings\ filter_main_wscript_legit_2: Image|endswith: \wscript.exe TargetObject|contains: \wscript.exe condition: selection and not 1 of filter_main_* falsepositives: - Some legitimate admin or install scripts may use these processes for registry modifications. level: medium
Near-miss passage: Sigma rule: Detects the creation of a scheduled task using the "-XML" flag with a file without the '.xml' extension. This behavior c. Logsource: windows / process_creation. Rule: title: Suspicious Scheduled Task Creation via Masqueraded XML File id: dd2a821e-3b07-4d3b-a9ac-929fe4c6ca0c status: test description: Detects the creation of a scheduled task using the "-XML" flag with a file without the '.xml' extension. This behavior could be indicative of potential defense evasion attempt during persistence references: - https://learn.microsoft.com/en-us/windows/win32/taskschd/daily-trigger-example--xml- - https://github.com/elastic/protections-artifacts/blob/084067123d3328a823b1c3fdde305b694275c794/behavior/rules/persistence_suspicious_scheduled_task_creation_via_masqueraded_xml_file.toml author: Swachchhanda Shrawan Poudel, Elastic (idea) date: 2023-04-20 modified: 2024-12-01 tags: - attack.privilege-escalation - attack.execution - attack.persistence - attack.stealth - attack.t1036.005 - attack.t1053.005 logsource: product: windows category: process_creation detection: selection_img: - Image|endswith: \schtasks.exe - OriginalFileName: schtasks.exe selection_cli_create: CommandLine|contains: - /create - -create selection_cli_xml: CommandLine|contains: - /xml - -xml filter_main_extension_xml: CommandLine|contains: .xml filter_main_system_process: IntegrityLevel: - System - S-1-16-16384 filter_main_rundll32: ParentImage|endswith: \rundll32.exe ParentCommandLine|contains|all: - :\WINDOWS\Installer\MSI - .tmp,zzzzInvokeManagedCustomActionOutOfProc filter_optional_third_party: ParentImage|endswith: - :\ProgramData\OEM\UpgradeTool\CareCenter_*\BUnzip\Setup_msi.exe - :\Program Files\Axis Communications\AXIS Camera Station\SetupActions.exe - :\Program Files\Axis Communications\AXIS Device Manager\AdmSetupActions.exe - :\Program Files (x86)\Zemana\AntiMalware\AntiMalware.exe - :\Program Files\Dell\SupportAssist\pcdrcui.exe condition: all of selection_* and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: medium