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Convert indexed Sigma rules into analyst-ready detections.

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Indexed Rules

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Backends

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CLI Versions

Newest: 2.0.2

Translation Workspace

Shape the rule before it leaves Phoenix

Tune Translation

Active Rule

Suspicious Schtasks Schedule Types

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Suspicious Schtasks Schedule Types

Using Splunk · Default · sigma-cli 2.0.2

Translation controls

Adjust the rule on the left, then regenerate when you want a fresh backend-native query.

BackendSplunkFormatDefaultVersion2.0.2

title: Suspicious Schtasks Schedule Types
id: 24c8392b-aa3c-46b7-a545-43f71657fe98
related:
    - id: 7a02e22e-b885-4404-b38b-1ddc7e65258a
      type: similar
status: test
description: Detects scheduled task creations or modification on a suspicious schedule type
references:
    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-change
    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create
    - http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-09-09
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.t1053.005
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Image|endswith: '\schtasks.exe'
        - OriginalFileName: 'schtasks.exe'
    selection_time:
        CommandLine|contains:
            - ' ONLOGON '
            - ' ONSTART '
            - ' ONCE '
            - ' ONIDLE '
    filter_privs:
        CommandLine|contains:
            - 'NT AUT' # This covers the usual NT AUTHORITY\SYSTEM
            - ' SYSTEM' # SYSTEM is a valid value for schtasks hence it gets it's own value with space
            - 'HIGHEST'
    condition: all of selection_* and not 1 of filter_*
falsepositives:
    - Legitimate processes that run at logon. Filter according to your environment
level: high

CLI command

Copy the exact command to reproduce this translation locally.

sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_schtasks_schedule_type.yml