A strong, multi-layered defense and strategy to address ransomware is composed of three key elements: education, implementation and remediation.
The war on ransomware is real. In the past few years, this form of ransomware attack has become a valid threat to business. We have seen huge attacks that have rendered multinational organizations and even governments vulnerable and unable to continue mission-critical operations.
In 2017, WannaCry brought hospital IT departments across Europe to a standstill, with over 200,000 computers affected, demonstrating the destructive potential of ransomware.
According to Europol’s 2019 Internet Organized Crime Threat Assessment (IOCTA) report this form of cyberattack is still on the rise. Organizations need to acknowledge this threat and take steps to prepare, defend and be ready to remediate. This is a critical step to avoid an unplanned and likely-ineffective response later during a ransomware incident.
A strong, multi-layered defense and strategy to address ransomware for business is composed of three key elements: education, implementation and remediation. Furthermore, having an ultra-resilient approach to backing up, recovering and restoring data is vital to protect business continuity in the event of an event.
Educating the business
From an education perspective, there are two major audiences that should be targeted: IT staff and organizational users. It is important to target both groups as threats can be introduced from both personas.
The main points of entry into a business for ransomware are through phishing, software updates and Remote Desktop Protocol (RDP) or other remote access mechanisms. Put simply, in most cases cyber-attackers are not made to work as hard as they should to fetch big prizes. Knowing that these are the three main mechanisms is a huge help in focusing the scope of where to invest the most effort to be resilient from an attack vector perspective.
Most IT administrators use RDP for their daily work, with many RDP servers directly connected on the Internet. The reality is that Internet-connected RDP needs to stop. IT administrators can get creative on special IP addresses, redirecting RDP ports, complex passwords and more; but the data does not lie: over half of ransomware comes in via RDP. This tells us that exposing RDP servers to the Internet does not align with a forward-thinking ransomware resiliency strategy.
The other frequent mode of entry is via phishing emails. We have all seen email that does not look right. The right thing to do is delete that item. Not every user handles these situations the same way, however. There are popular tools to assess the threat risk of phish success for an organization. Combined with training to help employees identify phishing emails or link, self-assessment tools can be an effective mode of first-line defense.
The third area that comes into play is the risk of exploiting vulnerabilities. Keeping systems up to date is an age-old IT responsibility that is more important than ever. While this is not a glamourous task, it can quickly seem a good investment should a ransomware incident exploit a known and patched vulnerability.
Be mindful to keep current with updates to critical categories of IT assets: operating systems, applications, databases and device firmware. A number of ransomware strains, including WannaCry and Petya have been based on previously-discovered vulnerabilities that have since been corrected.
Implement and remediate
Even organizations that follow best practise to prevent exposure to ransomware are at risk. While education is a critical step, organizations must prepare for the worst-case scenario. If there is one takeaway for IT and business leaders, it is to have a form of ultra-resilient backup storage.
At Veeam, we advocate the 3-2-1 rule as a general data management strategy. The 3-2-1 rule recommends that there should be at least three copies of important data, on at least two different types of media, with at least one of these copies being off-site. The best part is that this rule does not demand any particular type of hardware and is versatile enough to address nearly any failure scenario.
The ‘one’ copy in the 3-2-1 strategy has to be ultra-resilient. By this, we mean air-gapped, offline or immutable. There are different forms of media on which this copy of data can be stored in an ultra-resilient manner. These include tape media, immutable backups in S3 or S3-compatible object storage, air-gapped and offline media, or software as a service for backup and Disaster Recovery (DR).
In spite of these education and implementation techniques, organizations must still be prepared to remediate a threat. At Veeam, our approach is simple. Do not pay the ransom.
The only option is to restore data. Additionally, organizations need to plan their response when a threat is discovered. The first action is to contact support to receive guidance in restoring data in ransomware incidents. Do not put your backups at risk as they are critical to your ability to recover.
In disasters of any type, communication becomes one of the first challenges to overcome. Have a plan for how to communicate to the right individuals out-of-band. This would include group text lists, phone numbers or other mechanisms that are commonly used to align communications across an extended team. In this contact book you also need security, incident response and identity management experts— internal or external.
There are also conversations to have around decision authority. Business must decide who makes the call to restore or to fail-over before ransomware incident takes place. Once a decision to restore has been made, organizations need to implement additional safety checks before putting systems back online.
A decision also has to be made as to whether an entire virtual machine (VM) recovery is the best course of action, or if a file-level recovery makes more sense. Finally, the restoration process itself must be secure, running full anti-virus and anti-malware scans across all systems as well as forcing users to change their passwords post-recovery.
While the threat of ransomware is real, with the right preparation organizations can increase resiliency against an incident to minimize the risk of data loss, financial loss, and reputational damage.