LoFP LoFP / t1053.005

t1053.005

TitleTags
administrative activity
administrators may start scheduled tasks on remote systems, but this activity is usually limited to a small set of hosts or users.
although uncommon, legitimate applications may create and delete a scheduled task within 30 seconds. filter as needed.
benign administrative tasks can also trigger alerts, necessitating a firm understanding of the typical system behavior and precise tuning of the analytic to reduce false positives.
benign scheduled tasks creations or executions that happen often during software installations
false positives are possible if legitimate applications are allowed to register tasks that call a shell to be spawned. filter as needed based on command-line or processes that are used legitimately.
false positives may arise from legitimate applications that create tasks to run as system. therefore, it's recommended to adjust filters based on parent process or modify the query to include world writable paths for restriction.
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
false positives should be limited as the activity is not common to delete only the sd from the registry. filter as needed. update the analytic modified or deleted values based on product that is in the datamodel.
false positives will be limited to legitimate applications creating a task to run as system. filter as needed based on parent process, or modify the query to have world writeable paths to restrict it.
false positives will be present. filter based on actionname paths or specify keywords of interest.
if the source ip is not localhost then it's super suspicious, better to monitor both local and remote changes to gpo scheduledtasks
in some cases, an automated script or system may enable this setting continuously, leading to false positives. to avoid such situations, it is recommended to monitor the frequency and context of the registry modification and modify or filter the detection rules as needed. this can help to reduce the number of false positives and ensure that only genuine threats are identified. additionally, it is important to investigate any detected instances of this modification and analyze them in the broader context of the system and network to determine if further action is necessary.
it is possible scripts or administrators may trigger this analytic. filter as needed based on parent process, application.
legitimate applications may spawn powershell as a child process of the the identified processes. filter as needed.
legitimate applications may trigger this behavior, filter as needed.
legitimate applications may use random scheduled task names.
legitimate processes that run at logon. filter according to your environment
legitimate software naming their tasks as guids
no known false positives
software installation
software installers that run from temporary folders and also install scheduled tasks are expected to generate some false positives
software that uses the appdata folder and scheduled tasks to update the software in the appdata folders
some installers were seen using this method of creation unfortunately. filter them in your environment
the main source of false positives could be the legitimate use of scheduled tasks from these directories. careful tuning of this search may be necessary to suit the specifics of your environment, reducing the rate of false positives.
this analytic may also capture legitimate administrative activities such as system updates or maintenance tasks, which can be classified as false positives. filter as needed.
unlikely
while it is possible for legitimate scripts or administrators to trigger this behavior, filtering can be applied based on the parent process and application to reduce false positives. analysts should reference the provided references to understand the context and threat landscape associated with this activity.
while it is possible to have false positives, due to legitimate administrative tasks, these are usually limited and should still be validated and investigated as appropriate.