Networking – Casserly Consulting

Did You Know Your Router Can be Infected?

A new type of malware is targeting routers in what is considered a large enough threat that even the FBI is addressing it. Even worse, a router isn’t necessarily a device that you think would be vulnerable to attack from a hacker. What can you do to keep your business’ Internet access points secure from hacking attacks? Let’s dig in to the details about what the VPNFilter malware does and how you can address it.

Explaining VPNFilter
The malware in question, VPNFilter, hides in routers for both individual users and small businesses with the intention of persisting even if the device has been rebooted. VPNFilter targets devices that are Ukraine-based most of the time, but others have been known to fall victim to this as well. It’s thought that the VPNFilter malware originated from a group called Sofacy. The malware itself takes three steps to become an issue for your organization.

The first is that the malware sets itself up so that it will persist even if the device is rebooted or turned off. The second stage of the attack consists of the malware installing permissions for itself to change router settings, manage files, and execute commands. This allows the router to essentially brick itself, leading to considerable connectivity problems. The final stage of this malware lets the hackers look at the data packets passing to and from the device, as well as the ability to issue commands and communicate through the Tor web browser.

The reason why the FBI recommends resetting your router is because the second and third steps are wiped when you do so, but the first stage remains regardless.

Is Your Router Affected?
While not all routers are affected, there is still a sizeable list of confirmed contaminated devices. Some of the affected brands include:

Asus
D-Link
Huawei
Linksys
MikroTik
Netgear
TP-Link
Ubiquiti
Upvel
ZTE

For a comprehensive list of affected devices, you can see specifics for each brand at Symantec’s website: https://www.symantec.com/blogs/threat-intelligence/vpnfilter-iot-malware

How to Fix It
The best way to resolve these issues with VPNFilter is to perform a factory reset for your router, which completely deletes anything installed during the first stage of the threat. If the router’s manufacturer has administered a patch for the vulnerability, you can also install it following a factory reset so that you’ll never have to deal with this vulnerability again.

For more updates and tips on some of the latest threats, keep an eye on COMPANYNAME’s blog.

Tip of the Week: You May Want to Remove Your Wi-Fi Information From the WiGLE Database

The next time you look at your device’s available Wi-Fi connections when in public, take a look at what some of the local connection names are. Chances are that you’ll see some names that match a nearby organization or family. Others might still be using the default SSID, like Linksys/Netgear-something-or-other. Others might get a little more creative. The latter example may have the right idea; using an obscure wireless network name is much more secure than naming your connection after what it’s associated with.

That’s not to say that those who have named their home Wi-Fi networks things like “FBI Surveillance Van 3” or “Pretty Fly for a Wi-Fi” are in the right, but you get the idea. Instead of misleading people with your SSID, you want to think of your wireless network’s name as a shield against possible hacking attacks. In fact, it’s recommended that you don’t broadcast it at all if you can help it, but this isn’t always an option–especially for organizations that offer Wi-Fi to the public as part of their consumer obligation.

One website in particular highlights the importance of naming your Wi-Fi network something inconspicuous. A service called WiGLE collects information from wireless networks and compiles it in an online database that’s searchable. WiGLE also offers software solutions that can map, query, and update these databases. Among the uses for WiGLE are: educating the public, research projects, site surveys, journalism, analyzing wireless usage, and finding usable networks while on the go.

Knowing that a tool like this exists, should make you stop and ask several questions. If your wireless network’s data is being collected, is it at risk? Is it something that you should be worried about? How do you remove your business’s wireless network from WiGLE? Well, WiGLE has posted answers to all of these questions:

“If your network is in WiGLE and you don’t like it, we’ll take it out immediately, but you should look into making your network harder to detect AND more secure; remember that you’re the one bombarding passers-by with your signal. We aren’t affiliated directly with any particular community or interest (other than our own), but we applaud the efforts of the people who wrote the stumbling software that feeds our project, the people looking to use wireless in innovative ways, and especially the community of people who just dig wireless network access and dig sharing it.”

To learn more, you can access the website here.

What are your thoughts on WiGLE? Let us know in the comments, and be sure to reach out to us for help securing your company’s wireless network.

Are you confident in the security of your wireless network? Don’t hesitate to call us at PHONENUMBER if you feel it’s time to audit one of your most targetable entry-points.