t1603-scheduled-taskjob

name	T1603_scheduled-taskjob
description	Adversaries may abuse task scheduling functionality to facilitate initial or recurring execution of malicious code.
category	input-validation
version	18.1
author	cyberstrike-official
tags	["mitre-attack","mobile","t1603","execution","persistence","android","ios"]
technique_id	T1603
tactic	execution
all_tactics	["execution","persistence"]
platforms	["Android","iOS"]
mitre_url	https://attack.mitre.org/techniques/T1603
tech_stack	["android","ios"]
cwe_ids	["CWE-94"]
chains_with	[]
prerequisites	[]
severity_boost	{}

T1603 Scheduled Task/Job

High-Level Description

Adversaries may abuse task scheduling functionality to facilitate initial or recurring execution of malicious code. On Android and iOS, APIs and libraries exist to facilitate scheduling tasks to execute at a specified date, time, or interval.

On Android, the WorkManager API allows asynchronous tasks to be scheduled with the system. WorkManager was introduced to unify task scheduling on Android, using JobScheduler, GcmNetworkManager, and AlarmManager internally. WorkManager offers a lot of flexibility for scheduling, including periodically, one time, or constraint-based (e.g. only when the device is charging).

On iOS, the NSBackgroundActivityScheduler API allows asynchronous tasks to be scheduled with the system. The tasks can be scheduled to be repeating or non-repeating, however, the system chooses when the tasks will be executed. The app can choose the interval for repeating tasks, or the delay between scheduling and execution for one-time tasks.

Kill Chain Phase

• Execution (TA0041)
• Persistence (TA0028)

Platforms: Android, iOS

What to Check

• Identify if Scheduled Task/Job technique is applicable to target mobile environment
• Check Android devices for indicators of Scheduled Task/Job
• Check iOS devices for indicators of Scheduled Task/Job
• Assess detection coverage (1 detection strategies)

How to Test

Identify Attack Surface

Determine if the target mobile environment is susceptible to Scheduled Task/Job by examining the target platforms (Android, iOS).

Assess Existing Defenses

Review whether mitigations for T1603 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

Remediation Guide

No specific mitigations documented for this technique.

Detection

Detection of Scheduled Task/Job

Risk Assessment

Finding	Severity	Impact
Scheduled Task/Job technique applicable	Low	Execution