Suspicious Scheduled Task Write to System32 Tasks

SIGMA detection rule by Florian Roth (Nextron Systems) · NOASSERTION

Detects the creation of tasks from processes executed from suspicious locations

title: Suspicious Scheduled Task Write to System32 Tasks
id: 80e1f67a-4596-4351-98f5-a9c3efabac95
status: test
description: Detects the creation of tasks from processes executed from suspicious locations
references:
    - Internal Research
author: Florian Roth (Nextron Systems)
date: 2021-11-16
modified: 2022-01-12
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.t1053
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|contains: '\Windows\System32\Tasks'
        Image|contains:
            - '\AppData\'
            - 'C:\PerfLogs'
            - '\Windows\System32\config\systemprofile'
    condition: selection
falsepositives:
    - Unknown
level: high

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

616eb103-9fbc-473e-abb1-5bac2157b1ad

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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