Stupid title, but ransomware has been in the news quite a bit recently. I’ve had some tabs open in my browser for over twelve months with articles about ransomware that I found interesting. I thought it was time to share them and get this post out there. This isn’t comprehensive by any stretch, but rather it’s a list of a few things to look at when looking into anti-ransomware solutions, particularly for NAS environments.
It Kicked Him Right In The NAS
The way I see it (and I’m really not the world’s strongest security person), there are (at least) three approaches to NAS and ransomware concerns.
This seems to be where most companies operate – addressing ransomware as it enters the organisation via the end users. There are a bunch of solutions out there that are designed to protect humans from themselves. But this approach doesn’t always help with alternative attack vectors and it’s only as good as the update processes you have in place to keep those endpoints updated. I’ve worked in a few shops where endpoint protection solutions were deployed and then inadvertently clobbered by system updates or users with too many privileges. The end result was that the systems didn’t do what they were meant to and there was much angst.
The NAS Itself
There are things you can do with NetApp solutions, for example, that are kind of interesting. Something like Stealthbits looks neat, and Varonis also uses FPolicy to get a similar result. Your mileage will vary with some of these solutions, and, again, it comes down to the ability to effectively ensure that these systems are doing what they say they will, when they will.
A number of the data protection vendors are talking about their ability to recover quickly from ransomware attacks. The capabilities vary, as they always do, but most of them have a solid handle on quick recovery once an infection is discovered. They can even help you discover that infection by analysing patterns in your data protection activities. For example, if a whole bunch of data changes overnight, it’s likely that you have a bit of a problem. But, some of the effectiveness of these solutions is limited by the frequency of data protection activity, and whether anyone is reading the alerts. The challenge here is that it’s a reactive approach, rather than something preventative. That said, companies like Rubrik are working hard to enhance its Radar capability into something a whole lot more interesting.
Other things that can help limit your exposure to ransomware include adopting generally robust security practices across the board, monitoring all of your systems, and talking to your users about not clicking on unknown links in emails. Some of these things are easier to do than others.
I don’t think any of these solutions provide everything you need in isolation, but the challenge is going to be coming up with something that is supportable and, potentially, affordable. It would also be great if it works too. Ransomware is a problem, and becoming a bigger problem every day. I don’t want to sound like I’m selling you insurance, but it’s almost not a question of if, but when. But paying attention to some of the above points will help you on your way. Of course, sometimes Sod’s Law applies, and things will go badly for you no matter how well you think you’ve designed your systems. At that point, it’s going to be really important that you’ve setup your data protection systems correctly, otherwise you’re in for a tough time. Remember, it’s always worth thinking about what your data is worth to you when you’re evaluating the relative value of security and data protection solutions. This article from Chin-Fah had some interesting insights into the problem. And this article from Cohesity outlined a comprehensive approach to holistic cyber security. This article from Andrew over at Pure Storage did a great job of outlining some of the challenges faced by organisations when rolling out these systems. This list of NIST ransomware resources from Melissa is great. And if you’re looking for a useful resource on ransomware from VMware’s perspective, check out this site.