T0874 Hooking

T0874 Hooking

High-Level Description

Adversaries may hook into application programming interface (API) functions used by processes to redirect calls for execution and privilege escalation means. Windows processes often leverage these API functions to perform tasks that require reusable system resources. Windows API functions are typically stored in dynamic-link libraries (DLLs) as exported functions.

One type of hooking seen in ICS involves redirecting calls to these functions via import address table (IAT) hooking. IAT hooking uses modifications to a process IAT, where pointers to imported API functions are stored.

Kill Chain Phase

• Execution (TA0104)
• Privilege Escalation (TA0111)

Platforms: ICS

What to Check

• Identify if Hooking technique is applicable to target ICS environment
• Check ICS/SCADA systems for indicators of Hooking
• Verify mitigations are bypassed or absent (2 known mitigations)
• Assess detection coverage (1 detection strategies)

How to Test

Identify Attack Surface

Determine if the target ICS/SCADA environment is susceptible to Hooking by examining operational technology systems and network architecture.

Assess Existing Defenses

Review whether mitigations for T0874 are in place. If defenses are absent or misconfigured, this technique may be exploitable in the ICS environment.

Remediation Guide

M0944 Restrict Library Loading

Restrict the use of untrusted or unknown libraries, such as remote or unknown DLLs.

M0947 Audit