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Insider Threat Matrix™

  • ID: PV025
  • Created: 09th July 2024
  • Updated: 22nd July 2024
  • Platforms: Windows, Linux, MacOS,
  • Contributor: The ITM Team

Full Disk Encryption

Full Disk Encryption (FDE) involves encrypting all data on a device's hard disk or solid-state drive (SSD), including the Operating System (OS), third party applications and user data. This helps to ensure that data on the disk remains inaccessible if the laptop is lost or stolen, as the data cannot be accessed without the correct decryption key.

 

Typically a user decrypts a FDE disk during the boot process. The user is prompted to enter a password or provide a hardware token to unlock the encryption key. Only after successful authentication can the disk be decrypted and subsequently the Operating System loaded and the data accessed.

Sections

ID Name Description
IF015Theft

A subject steals an item or items belonging to an organization, such as a corporate laptop or corporate mobile phone.

PR011Boot Order Manipulation

A subject accesses BIOS or UEFI to manipulate the boot order of a target computer to boot from an external device in order to access the target computer's file system without needing to interact or authenticate with the Operating System of the target computer.

ME001Unauthorized Access to Unassigned Hardware

The subject accesses or uses a corporate hardware asset, typically a laptop or other endpoint device, that is not assigned to them by role, provisioning, or inventory records. This behavior often emerges in environments with weak asset lifecycle controls, during periods of staff transition, or when hardware is reissued informally without updating allocation systems.

 

Subjects may obtain unassigned hardware through dormant inventory, “loaner” pools, peer handoffs, or by reactivating previously deprovisioned devices. Use of unassigned hardware circumvents standard monitoring, ownership attribution, and access governance. It may be leveraged to evade visibility, perform preparatory actions, or compartmentalize risky activity away from their primary, monitored device.

 

Investigators should view such access as a strong early indicator of potential infringement(s), particularly when associated with stale or unmanaged hardware, elevated privilege configuration, or the absence of endpoint telemetry.

IF002.007Exfiltration via Target Disk Mode

When a Mac is booted into Target Disk Mode (by powering the computer on whilst holding the ‘T’ key), it acts as an external storage device, accessible from another computer via Thunderbolt, USB, or FireWire connections. A subject with physical access to the computer, and the ability to control boot options, can copy any data present on the target disk, bypassing the need to authenticate to the target computer.

ME016.001Target Disk Mode Access

A subject has the ability to put the target system into “Target Disk Mode” (MacOS).

ME024.004Access to Physical Hardware

Subjects with physical access to critical hardware—such as data center infrastructure, on-premises servers, network appliances, storage arrays, or specialized equipment like CCTV and alarm systems—represent a significant insider threat due to their ability to bypass logical controls and interact directly with systems. This level of access can facilitate a wide range of security compromises, many of which are difficult to detect through conventional digital monitoring.

 

Physical access may also include proximity to sensitive areas such as network closets, on-premises server racks, backup repositories, or control systems in operational technology (OT) environments. In high-security settings, even brief unsupervised access can be exploited to compromise system integrity or enable ongoing unauthorized access.

 

With this type of access, a subject can:

  • Extract or clone drives and media for offline analysis or exfiltration of sensitive data, including proprietary documents, logs, authentication secrets, and configuration files.
  • Introduce malicious hardware or firmware, such as USB-based keyloggers, hardware implants, or modified components that persist beyond reboots and may evade traditional endpoint protections.
  • Bypass access controls by booting from external media, altering BIOS or UEFI settings, or resetting system passwords using direct hardware manipulation.
  • Install or modify software directly on the system, enabling surveillance tools, remote access backdoors, or malicious code that blends in with legitimate system processes.
  • Capture network traffic by tapping physical interfaces or inserting intermediary devices such as portable switches, protocol analyzers, or rogue wireless access points.
  • Disable security mechanisms, such as disconnecting monitoring systems, tampering with surveillance equipment, or disabling redundant power and failover systems to induce outages.

 

In operational environments, subjects with access to physical control systems (e.g., ICS/SCADA components, industrial HMIs, or IoT gateways) may alter processes, cause service disruptions, or create safety hazards. Similarly, access to CCTV or badge systems may allow them to erase footage, monitor employee movements, or manipulate access control logs.

 

Subjects with this form of access represent an elevated risk, especially when combined with technical knowledge or administrative privileges. The risk is compounded in environments with limited physical security controls, inadequate logging of physical entry, or weak segmentation between physical and digital assets.

ME001.001Access to Asset Past Termination

The subject accesses a corporate hardware asset, most commonly a laptop or corporate mobile device, after their employment has formally ended. This typically occurs due to gaps in deprovisioning, delayed hardware recovery, or the subject physically retaining the device despite offboarding procedures. Post-termination access may be opportunistic or intentional, and may precede or coincide with data exfiltration, sabotage, or unauthorized continuation of internal access.

 

This sub-section is relevant in cases where the hardware asset is no longer linked to an active identity in HR systems but remains technically functional and capable of network, VPN, or service access. Such access undermines the assumption that termination alone revokes operational capability and may point to procedural drift in IT, HR, or facilities handover workflows.