Adversaries may modify property list files (plist files) to enable other malicious activity, while also potentially evading and bypassing system defenses. macOS applications use plist files, such as the info.plist file, to store properties and configuration settings that inform the operating system how to handle the application at runtime. Plist files are structured metadata in key-value pairs formatted in XML based on Apple's Core Foundation DTD. Plist files can be saved in text or binary format.(Citation: fileinfo plist file description) Adversaries can modify key-value pairs in plist files to influence system behaviors, such as hiding the execution of an application (i.e. [Hidden Window](https://attack.mitre.org/techniques/T1564/003)) or running additional commands for persistence (ex: [Launch Agent](https://attack.mitre.org/techniques/T1543/001)/[Launch Daemon](https://attack.mitre.org/techniques/T1543/004) or [Re-opened Applications](https://attack.mitre.org/techniques/T1547/007)). For example, adversaries can add a malicious application path to the `~/Library/Preferences/com.apple.dock.plist` file, which controls apps that appear in the Dock. Adversaries can also modify the LSUIElement key in an application’s info.plist file to run the app in the background. Adversaries can also insert key-value pairs to insert environment variables, such as LSEnvironment, to enable persistence via [Dynamic Linker Hijacking](https://attack.mitre.org/techniques/T1574/006).(Citation: wardle chp2 persistence)(Citation: eset_osx_flashback)

Linked Issues

Issuelinks
Linktype Issue
is related to Techniques
is blocked by Application Developer Guidance
is blocked by Detection Strategy for Plist File Modification (T1647)
is blocked by Configuration Change Control
is blocked by Access Restriction For Change
is blocked by Security, Compliance & Resilience Controls Oversight
is blocked by Secure Baseline Configurations
is blocked by Least Functionality
is blocked by Continuous Monitoring
is blocked by Cybersecurity & Data Protection Attributes
is blocked by Endpoint File Integrity Monitoring (FIM)
is blocked by Access Enforcement
is blocked by Least Privilege
is blocked by Remote Access
is blocked by Secure Engineering Principles
is blocked by Security, Compliance & Resilience Testing Throughout Development
is blocked by Developer Configuration Management
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