cyberstrikeus T0815 Denial of View
High-Level Description
Adversaries may cause a denial of view in attempt to disrupt and prevent operator oversight on the status of an ICS environment. This may manifest itself as a temporary communication failure between a device and its control source, where the interface recovers and becomes available once the interference ceases.
An adversary may attempt to deny operator visibility by preventing them from receiving status and reporting messages. Denying this view may temporarily block and prevent operators from noticing a change in state or anomalous behavior. The environment's data and processes may still be operational, but functioning in an unintended or adversarial manner.
Kill Chain Phase
- Impact (TA0105)
Platforms: ICS
What to Check
- Identify if Denial of View technique is applicable to target ICS environment
- Check ICS/SCADA systems for indicators of Denial of View
- Verify mitigations are bypassed or absent (3 known mitigations)
- Assess detection coverage (1 detection strategies)
How to Test
Identify Attack Surface
Determine if the target ICS/SCADA environment is susceptible to Denial of View by examining operational technology systems and network architecture.
Assess Existing Defenses
Review whether mitigations for T0815 are in place. If defenses are absent or misconfigured, this technique may be exploitable in the ICS environment.
Remediation Guide
M0810 Out-of-Band Communications Channel
Provide operators with redundant, out-of-band communication to support monitoring and control of the operational processes, especially when recovering from a network outage . Out-of-band communication should utilize diverse systems and technologies to minimize common failure modes and vulnerabilities within the communications infrastructure. For example, wireless networks (e.g., 3G, 4G) can be used to provide diverse and redundant delivery of data.
M0953 Data Backup
Take and store data backups from end user systems and critical servers. Ensure backup and storage systems are hardened and kept separate from the corporate network to prevent compromise. Maintain and exercise incident response plans , including the management of gold-copy back-up images and configurations for key systems to enable quick recovery and response from adversarial activities that impact control, view, or availability.
M0811 Redundancy of Service
Hot-standbys in diverse locations can ensure continued operations if the primarily system are compromised or unavailable. At the network layer, protocols such as the Parallel Redundancy Protocol can be used to simultaneously use redundant and diverse communication over a local network.
Detection
Detection of Denial of View
Risk Assessment
| Finding | Severity | Impact |
|---|---|---|
| Denial of View technique applicable | High | Impact |
CWE Categories
| CWE ID | Title |
|---|---|
| CWE-400 | Uncontrolled Resource Consumption |