T0866 Exploitation of Remote Services

T0866 Exploitation of Remote Services

High-Level Description

Adversaries may exploit a software vulnerability to take advantage of a programming error in a program, service, or within the operating system software or kernel itself to enable remote service abuse. A common goal for post-compromise exploitation of remote services is for initial access into and lateral movement throughout the ICS environment to enable access to targeted systems.

ICS asset owners and operators have been affected by ransomware (or disruptive malware masquerading as ransomware) migrating from enterprise IT to ICS environments: WannaCry, NotPetya, and BadRabbit. In each of these cases, self-propagating (wormable) malware initially infected IT networks, but through exploit (particularly the SMBv1-targeting MS17-010 vulnerability) spread to industrial networks, producing significant impacts.

Kill Chain Phase

• Initial Access (TA0108)
• Lateral Movement (TA0109)

Platforms: ICS

What to Check

• Identify if Exploitation of Remote Services technique is applicable to target ICS environment
• Check ICS/SCADA systems for indicators of Exploitation of Remote Services
• Verify mitigations are bypassed or absent (8 known mitigations)
• Assess detection coverage (1 detection strategies)

How to Test

Identify Attack Surface

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

Assess Existing Defenses

Review whether mitigations for T0866 are in place. If defenses are absent or misconfigured, this technique may be exploitable in the ICS environment.

Remediation Guide

M0916 Vulnerability Scanning

Regularly scan the internal network for available services to identify new and potentially vulnerable services.

M0942 Disable or Remove Feature or Program