sigmamediumHunting

Scheduled Task Executed Uncommon LOLBIN

Detects the execution of Scheduled Tasks where the program being run is located in a suspicious location or where it is an unusual program to be run from a Scheduled Task

MITRE ATT&CK

T1053.005

privilege-escalationexecutionpersistence

Detection Query

selection:
  EventID: 129
  Path|endswith:
    - \calc.exe
    - \cscript.exe
    - \mshta.exe
    - \mspaint.exe
    - \notepad.exe
    - \regsvr32.exe
    - \wscript.exe
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-12-05

Data Sources

windowstaskscheduler

Platforms

windows

References

Internal Research

Tags

attack.privilege-escalationattack.executionattack.persistenceattack.t1053.005

Raw Content

title: Scheduled Task Executed Uncommon LOLBIN
id: f0767f15-0fb3-44b9-851e-e8d9a6d0005d
status: test
description: Detects the execution of Scheduled Tasks where the program being run is located in a suspicious location or where it is an unusual program to be run from a Scheduled Task
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-12-05
modified: 2023-02-07
tags:
    - attack.privilege-escalation
    - attack.execution
    - attack.persistence
    - attack.t1053.005
logsource:
    product: windows
    service: taskscheduler
    definition: 'Requirements: The "Microsoft-Windows-TaskScheduler/Operational" is disabled by default and needs to be enabled in order for this detection to trigger'
detection:
    selection:
        EventID: 129 # Created Task Process
        Path|endswith:
            - '\calc.exe'
            - '\cscript.exe'
            - '\mshta.exe'
            - '\mspaint.exe'
            - '\notepad.exe'
            - '\regsvr32.exe'
            # - '\rundll32.exe'
            - '\wscript.exe'
    # filter_system:
    #     Path|endswith: '\rundll32.exe'
    #     TaskName|startswith: '\Microsoft\Windows\'
    # condition: selection and not 1 of filter_*
    condition: selection
falsepositives:
    - False positives may occur with some of the selected binaries if you have tasks using them (which could be very common in your environment). Exclude all the specific trusted tasks before using this rule
level: medium