ScheduleRunner - A C# Tool With More Flexibility To Customize Scheduled Task For Both Persistence And Lateral Movement In Red Team Operation

Scheduled task is one of the most popular attack technique in the past decade and now it is still commonly used by hackers/red teamers for persistence and lateral movement.

A number of C# tools were already developed to simulate the attack using scheduled task. I have been playing around with some of them but each of them has its own limitations on customizing the scheduled task. Therefore, this project aims to provide a C# tool to include the features that I want and provide enough flexibility on customizing the scheduled task.

Screenshot:

Methods (/method):

Method Function

create	create a new scheduled task
delete	delete an existing scheduled task
run	execute an existing scheduled task
query	query details for a scheduled task or all scheduled tasks under a folder
queryfolders	query all sub-folders in scheduled task
move	perform lateral movement using scheduled task (automatically create, run and delete)

Options for scheduled task creation (/method:create):

Method Function

[*] /taskname	Specify the name of the scheduled task
[*] /program	Specify the program that the task runs
[*] /trigger	Specify the schedule type. The valid values include: "minute", "hourly", "daily", "onstart", "onlogon", "onidle"
/modifier	Specify how often the task runs within its schedule type. Applicable only for schedule type such as "minute" (e.g., 1-1439 minutes) and "hourly" (e.g., 1-23 hours)
/starttime	Specify the start time for daily schedule type (e.g., 23:30)
/argument	Specify the command line argument for the program
/folder	Specify the folder where the scheduled task stores (default: \)
/author	Specify the author of the scheduled task
/description	Specify the description for the scheduled task
/remoteserver	Specify the hostname or IP address of a remote computer
/user	Run the task with a specified user account

[*] are mandatory fields.

Options for scheduled task deletion (/method:delete):

Method Function

[*] /taskname	Specify the name of the scheduled task
/folder	Specify the folder where the scheduled task stores (default: \)
/remoteserver	Specify the hostname or IP address of a remote computer

[*] are mandatory fields.

Options for scheduled task execution (/method:run):

Method Function

[*] /taskname	Specify the name of the scheduled task
/folder	Specify the folder where the scheduled task stores (default: \)
/remoteserver	Specify the hostname or IP address of a remote computer

[*] are mandatory fields.

Options for scheduled task query (/method:query):

Method Function

/taskname	Specify the name of the scheduled task
/folder	Specify the folder where the scheduled task stores (default: \)
/remoteserver	Specify the hostname or IP address of a remote computer

[*] are mandatory fields.

Options for scheduled task lateral movement (/method:move):

Method Function

[*] /taskname	Specify the name of the scheduled task
[*] /program	Specify the program that the task runs
[*] /remoteserver	Specify the hostname or IP address of a remote computer
/trigger	Specify the schedule type. The valid values include: "minute", "hourly", "daily", "onstart", "onlogon", "onidle"
/modifier	Specify how often the task runs within its schedule type. Applicable only for schedule type such as "minute" (e.g., 1-1439 minutes) and "hourly" (e.g., 1-23 hours)
/starttime	Specify the start time for daily schedule type (e.g., 23:30)
/argument	Specify the command line argument for the program
/folder	Specify the folder where the scheduled task stores (default: \)
/author	Specify the author of the scheduled task
/description	Specify the description for the scheduled task
/user	Run the task with a specified user account

[*] are mandatory fields.

Examples

Create a scheduled task called "Cleanup" that will be executed every day at 11:30 p.m.

ScheduleRunner.exe /method:create /taskname:Cleanup /trigger:daily /starttime:23:30 /program:calc.exe /description:"Some wordings" /author:netero1010

Create a scheduled task called "Cleanup" that will be executed every 4 hours on a remote server

ScheduleRunner.exe /method:create /taskname:Cleanup /trigger:hourly /modifier:4 /program:rundll32.exe /argument:c:\temp\payload.dll /remoteserver:TARGET-PC01

Delete a scheduled task called "Cleanup"

ScheduleRunner.exe /method:delete /taskname:Cleanup

Execute a scheduled task called "Cleanup"

ScheduleRunner.exe /method:run /taskname:Cleanup

Query details for a scheduled task called "Cleanup" under "\Microsoft\Windows\CertificateServicesClient" folder on a remote server

ScheduleRunner.exe /method:query /taskname:Cleanup /folder:\Microsoft\Windows\CertificateServicesClient /remoteserver:TARGET-PC01

Query all scheduled tasks under a specific folder "\Microsoft\Windows\CertificateServicesClient" on a remote server

ScheduleRunner.exe /method:query /folder:\Microsoft\Windows\CertificateServicesClient /remoteserver:TARGET-PC01

Query all sub-folders in scheduled task

ScheduleRunner.exe /method:queryfolders

Perform lateral movement using scheduled task to a remote server using a specific user account

ScheduleRunner.exe /method:move /taskname:Demo /remoteserver:TARGET-PC01 /program:rundll32.exe /argument:c:\temp\payload.dll /user:netero1010

Library and Reference Used: