Securing SCADA Systems: Consider Compensating Controls for More Reliable Operation

Editor’s Note: This article was contributed by Thomas Nuth, product marketing manager.

Three years ago, the concept of industrial cyber security became a popular discussion topic within the industrial networking community. Now the discussion has risen to the level of heads of state within the international community. The Executive Order – Improving Critical Infrastructure Cybersecurity signed by President Obama in February of this year is just one indication of the importance being attached to this issue.

What’s also interesting is the change in focus of this discussion topic. The key question has changed from an interested “Why do we need to secure our industrial network?” to a frantic “How do we do it?”

Obama’s Executive Order on Cybersecurity: A Sign of the Times? Image Credit: Mashable Read more »

Not All SCADA Security Attacks are Stuxnet Quality

Recently I received am email (shown further down on this page) purporting to be from the US Internal Revenue Service (IRS).

Phishing, like fishing, can be profitable. Image Credit: Fotopedia
Notice that the US Internal Revenue Service now uses Cyrillic script on its staff email addresses! And they use AOL as an email service, rather than irs.gov. (Is the US budget sequestration really hurting that badly? )
The third fun item is that the link you are supposed to click on (irs.gov/pub/irs-pdf/forms2012/) actually resolves to prospectrealty.net/wp-content/plugins/Bridge-Book-Printer/forms.htm.

(Note to Prospect Realty – you might want to secure your web site a little better.)

Beware Industrial Security Pros: Phishing Season is Open

Obviously, this email is a phishing attack. The creators of the email want me to click on the fake IRS link. If I did, my browser would be directed to the Prospect Realty website they have hacked. There I would either see a page that looked like an IRS log-in page (so the crooks could steal any confidential corporate information I enter) or the site would try to download some nasty Java applet that would take over my computer (assuming I hadn’t patched Java recently).

This phishing attack is so crude and so obvious that it is funny.

But in another way, it isn’t funny at all.

Phishing is Profitable for Attackers

Attacks like this only continue if they make their creators money. And the criminals behind them have very simple and effective ways to determine if their attacks are effective. They launch the email and then count the number of suckers that click in the next few hours. If they don’t get any clicks, they try something different. If they get enough victims, they launch the attack again against a new list of email addresses.

Now I received this same phishing email multiple times over several days – which leads me to believe that it was effective for the bad guys. Poor sods were clicking on the links. And these aren’t just any poor sods. Remember that this email is addressed to employers – not grandma or grandpa. So the email is an attack on the accounting teams in corporations, a group one might hope is very computer savvy.

Not All Cyber Security Threats are Stuxnet Quality

So what is my point? In the SCADA and ICS world we worry a lot about highly sophisticated threats like Stuxnet attacking our companies. Yet it seems that completely amateurish attacks work too (remember Shamoon?). Crooks don’t need sophisticated teams of hackers to be successful in cybercrime. All they need are employees to be so poorly trained that they click on even the most obvious phishing email.

Industry has a long way to go to make both IT and SCADA systems truly secure. To get there, it will cost a lot of money. But it seems like there are a lot of baby steps that still aren’t being taken on the road to security. Maybe it is time to take another look at those.

Does your organization train employees to be wary of phishing attacks? Do you have any “phishing” stories to share?

Related Content to Download

White Paper: Using ANSI/ISA-99 Standards to Improve Control System Security”      

Download this White Paper and learn about:

  • The ANSI/ISA-99 Zone and Security Model
  • A Real World Oil Refinery Example
  • Implementing Zones and Conduits with Industrial Security Appliances
  • Testing and Managing the Security Solution

Note: ANSI/ISA-99 Standards have recently been renamed ISA IEC 62443 Standards.

Related Links

© Tofino Security 2013 | All Rights Reserved | Tofino Security is a Belden Brand

Network Security – They had it right back in the 12th Century

Adoption of Industrial Ethernet has delivered many benefits to you, from enhanced visibility into your manufacturing operations to simplified network infrastructures and many things in between. Unfortunately, there is a downside to all this “connectedness” – a risk of malware or in extreme cases cyber attacks. Therefore, it is imperative you invest in protection mechanisms to reduce this risk. I recommend a philosophy called “Defense in Depth”, which utilizes a layered security model that may include Policies & Procedures, physical security, network security, PC security, and device security. By implementing multiple layers – types – of security simultaneously, you present a difficult defense for a hacker or piece of malware to penetrate. Read more »

ICS Security Requires an Overall Perspective

Editor’s Note: this is an excerpt from the Pike Research Blog.

The story goes that a group of business people were stranded on a desert island with a bountiful supply of canned and therefore imperishable food, but no way to open the cans. As the group struggled to find a solution the lone economist in the group piped up, “Assume a can opener…”

Sometimes it seems that’s how we approach industrial control systems (ICS) security. “Assume a secure perimeter…” It’s not fair to expect any single product or any single vendor to provide complete security for ICS networks, and yet we seem stuck in a world of point-solution purchases and security without any overriding architecture. It’s as if we’re saying, “If I can just get me some [insert technology of the week], then I’ll be secure.” Read more »

Shamoon: Malicious Malware Harms 30,000+ Computers

Ed. Note: This is a significant update to an article first published on Oct 3, 2012. The original article is available as a download in Related Links.

The most destructive post-Stuxnet discovery of advanced threats is a malicious malware known as Shamoon. Like Stuxnet, Duqu and Flame, it targeted energy companies in the Middle East, this time Saudi Aramco, Qatar’s RasGas and likely other oil and gas concerns in the region. It is a new species however, because it did not disrupt an industrial process as Stuxnet did, nor did it stealthily steal business information as Flame and Duqu did. Instead it removed and overwrote the information on the hard drives of 30,000 to 55,000 (yes, those numbers are correct!) workstations of Saudi Aramco (and who knows how many more at other firms). Read more »

SCADA Security Basics: Why are PLCs so Insecure?

Editor’s Note: This article was provided by Erik Schweigert, embedded systems developer.

Last week Eric Byres addressed the difference between SCADA, ICS and other jargon in our industry. This week I am going to address a question I am often asked “Why are industrial networks so hard to secure?” This is a big topic, so today I will address only “Why are PLCs so Insecure?”

The History of PLCs

Historically speaking, PLCs (programmable logic controllers) have been around since the early 1960s. The PLC started to be used shortly after the microprocessor was invented, as it allowed companies to replace the racks of relays that had previously performed industrial control. These panels of relays were difficult to modify, were hard to maintain and were a challenge to diagnose if a problem arose. Fixing a set of relays is a difficult task, especially since failures had the annoying tendency to happen at 3am! 

Old Relay System

 

Before PLCs racks of relays, like the ones shown above (circa 1965), controlled industrial automation systems. Source: XL Technology SystemsRead more »

SCADA Security Demystified in 5 Short Videos

Engineers as well as IT staff in the process control and SCADA industries have varying levels of knowledge about industrial cyber security. We come across this regularly when talking to people at industry events or speaking with customers or partners. To help you, no matter where you are in the learning curve, we have recently released a five-part video series. Read more »

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