In this blog,
we will discuss why we need to do an OT Security Assessment. This not only
applies to the facts for the previously deployed security solutions, but also
to diversifying incident response planning and preparing for the current
industry 4.0
Let us start with understanding OT Security
What Is ICS/SCADA (OT)?
OT generally
referred to as Operational Technology is a sophisticated network of interactive
ICS (Industrial Control Systems) that includes Sensors, Controllers and
Monitoring/Control Applications. It is used in oil/gas, manufacturing plants,
chemical/pharmaceutical plants, water/waste-water treatment plants, and
wherever industrial automation and continuous/batch processing are needed.
SCADA is
abbreviation for Supervisory Control and Data Acquisition. It is used in
pipeline monitoring, traffic signals, electricity power generation, etc.
Why Is OT
Security So Important?
Several firms
have chosen stability over security by not updating their OT systems in the
past. They must be up and functioning at all times, or the facility will lose
critical real-time data and fall behind on production schedules.
One of the
reasons why some OT systems are left alone is that delays or unplanned outages
cost a business time and money. Plants around the world, on the other hand, may
be working from equipment with minimal security measures and are growing more
networked.
Here are the
major security concerns:
These flaws
are ideal for cybercriminals hunting for exploits and entry points into an
industrial network. As a result of the importance of OT security, intrusions
can have kinetic implications, such as a breaker trip that causes the lights to
go out.
The number of
attacks aimed exclusively at targeting the OT environment is increasing. Many
of those attacks are on the company's OT system and infrastructure, and result
in plant or equipment outages.
Now we have
to understand the reasons for getting OT security done!
1. You wanna
“Secure what you have” in today’s converged IT and OT (Architectural Gaps)
Operational
technologies were never designed with the intention of being exposed to the
internet. The risk of OT assets has increased tremendously as the world moves
towards Industry 4.0. The industrial cyber security community has noticed a
terrible surge in industrial assaults as a result of the upgrade since the
attack surface is increased now.
The
fundamental issue is that developers/engineers never consider security concepts
when designing operational technologies. Thus, they now implement additional
security layers such as IDS, industrial firewalls, anomaly detection, and many
more to protect it.
2. Gaining
and maintaining visibility
This should
go without saying, but just in case it doesn't: asset visibility in the OT
environment should be as constant as feasible.
Organizations
can use one of two techniques to improve asset visibility: passive and
low-impact active.
Passive, in
this scenario, is simply listening and gathering as much data as possible from
OT infrastructure devices and applications. The dangers to safety and
reliability are greatly minimized; however, because you interact through
devices, systems, and apps, it may take longer to acquire comparable amounts of
data.
Despite the
dramatic urge to conceive asset visibility as a means to detecting the hackers
attempting to breach your environment, the OT security team's capacity to grasp
their environment's proper situational awareness improves as the OT
environment's asset visibility improves.
Low-impact
active, in this situation, active means systematically interrogating all
network addressable equipment and applications in the infrastructure. If not
done in a low-impact way, this can have negative consequences in OT situations,
jeopardizing safety, and reliability.
However,
effective asset visibility coordination between IT and OT will lower the
security risk to a level that stakeholders will accept and increase detection
of the organization's most common threats.
3. Incident
Response Planning
Incident
management is one of the most critical disciplines for ensuring that
operational services give value to consumers. The goal of incident planning is
to reduce the negative impact of occurrences by resuming regular service
functioning as soon as feasible.
Your incident
response capability is constantly developing because the prospect of a new
cyber threat or assault is always there.
The strategy
or the training that you created earlier this year may already need to be
modified. While you may make changes to your plans regularly, our reliance on
digital transactions may expose new and more complicated weaknesses and
exposure. A continuous incident response plan that actively controls the entire
process for you is a more dependable and successful way.
Developing
strategy, plans, playbooks, and procedures to support expected processes to
anticipated occurrences and then exercising them is a critical element of
incident planning.
4. If you
conduct a risk assessment, it will drive emphasis on controls
OT Risk Assessment
aids in determining whether cyber dangers exist in your environment
structurally. Only after explicitly identifying these hazards can the
effectiveness of (existing) interventions be determined.
This allows
us to reason with the new countermeasures if required, and their potential
effectiveness. Furthermore, determining the degree of identified risks allows
for the selection and prioritization of countermeasures and determining if the
implementation costs outweigh the possible repercussions.
Furthermore,
a risk assessment can provide you with a comprehensive understanding of your
organization's strengths and vulnerabilities. This overview can then be
utilized to increase the cyberattack readiness or avoid one by resolving the
highlighted flaws.
OT risks,
unlike IT risks, influence not just the availability, integrity, and
confidentiality of production-specific data or processes, but also the
facilities' reliability of operation and safety.
As the
backbone of any OT environment, different types of Industrial Control Systems
(ICS) such as PLCs, DCS, and SCADA systems demand special attention. These
distinctions should be taken into account when assessing risks and proposing
countermeasures in such situations.
5. Biggest
risk is not doing anything despite knowing about it (OT Risk Assessment)
Cyberattacks
on Operational Technology (OT) are becoming more common and protecting your
organization's OT environment is more vital than ever. Adversaries enter
networks in a variety of ways, causing a wide range of financial losses, either
directly by halting or reducing production, or indirectly by stealing and
selling your company's trade secrets.
Countermeasures
must be identified and deployed to lessen the odds of a cyberattack.
Implementing these countermeasures poorly or not at all is a danger for your
company.
Conclusion
Effective
ICS/SCADA security begins with the senior management support and with clear
vision, strategy, and Governance Model. Maturity Assessment of your environment
will help the organization to understand current maturity level and where you
want to go. Next follows Risk Assessment which helps you to Identify Risks,
Mitigate, Transfer, and bring the Risk to the acceptable level. Additional
technical assessments in OT will help the organization to build the
Vulnerability Management Program. All in all, organizations should take a
holistic approach covering People-Process-Technology.
How can squib.media
Help You with Your OT Security Needs?
We provide a
holistic OT assessment including maturity, compliance, risk assessment, and
technical security testing to identify the security risks associated with your
industrial systems. The service comprises threat analysis, business impact,
risk grading, and remedy recommendations. Our evaluation follows security
standards like NIST and ISA/IEC 62443.