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Victor Bunge Meyer
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May 13, 2020
Remote work has increased drastically and at the same time, there are clear indications that hackers, foreign powers, and other cybercriminals are increasing their activities. Working from home poses an increased challenge for IT departments, now required to offer flexible and secure solutions. This is a great challenge, not least because secure solutions are often more tedious for the end-user. While working from home is not something new for many organizations, the large number of people working from home is, which also increases exposure to a variety of security risks.
First and foremost, your organization should have an easy to understand written policy concerning remote working. Avoid long documents that no one will really read, instead go with one page covering the essentials. This policy should include guidelines for what you can do on your company's computers and how to connect securely. What happens, for example, when an employee uses their work computer for private browsing and streams through VPN and occupies bandwidth both in and out of the organization.
Connection to your organization's system should be done with a VPN, but it's important that authentication is still required for various services and systems, such as Microsoft Remote Desktop and SSH. You should also avoid exposing services that use SSH and RDP directly to the Internet. Take advantage of available certificate-based login along with two-factor authentication.
Working remotely allows malicious users the opportunity to copy, save and spread sensitive information. Therefore, your policy should also contain guidelines on how documents should be handled and what type of USB equipment may be connected. If a user can easily copy all documents from the document server to a USB flash drive? Malicious code could do the same.
Many video conference systems offer a wide variety of possibilities and settings. Using the wrong settings can drastically increase the risk of espionage. Make sure users are using secure settings, which means using secure passwords, and locked conferences. Also, make sure the software is always up to date. Many video conferencing companies are continuously discovering ongoing vulnerabilities, in these times when their systems are being put to the test.
Educate your users continuously and do awareness training. It can, for example, be done through various simulations of social engineering, like simulation of phishing campaigns. Keeping users safe can be compared to keeping a system secure. It is not a one-off effort but requires continuous work overtime.
Do not give the user too much freedom to install own software just because he works from home. A home network can consist of many different types of components and systems that can be hacked or compromised. A good starting point is to work based on the principle that the home network is already hacked.
Monitor events such as unsuccessful login attempts. Work proactively to detect vulnerabilities in protocols and services used. Maybe it is time to review an external service that monitors events 24/7, such as a Security Operations Center (SOC) service.
Working from home involves increased risk behaviors. Here are a few.
Have a clear and simple user policy - what the user can and cannot do. Educate your users on what allowed on the company's computer.
Use disk encryption
Use hard disk encryption. So even if a computer is lost, it is very difficult to access the information in it.
Have a solution for backup and recovery of files and data.
Make sure to keep computers and systems up to date. Not the least the software used for teleworking.
Enable two-factor authentication where possible.
Make sure that relevant events are logged on the client and that you receive alarms on suspicious activity.
Clear contact paths
Ensure that the user knows who to contact in the event of a suspected or identified incident.
Restrict & control
Make sure you have control over users' computers. Restrict permissions and what software that can be installed.
Vulnerability Management is a cornerstone in a modern cyber security defense.