Ransomware has grown into a serious threat to businesses, governments and individuals alike. Not only can it cause significant disruption to operations but also serious reputational harm.
But there are ways to defend against such attacks. Having a multi-layer resilience profile can mean the difference between recovering data and paying for it – or not.
1. Uninstall the Infected Software
Uninstalling ransomware is one of the most crucial steps you can take to safeguard your data. Unfortunately, this process can be time-consuming and complex.
Even if you successfully remove ransomware, you may still be locked out of your files. That is because encryption ransomware encrypts files so they cannot be viewed or restored without a decryption key.
Preventing ransomware attacks begins with being aware of its existence and workings. To do this, make sure your devices, systems and networks are up-to-date with security updates and install anti-malware software for protection.
It’s also wise to implement a sound backup strategy and store your files securely. Doing so can help restore your data from an earlier backup in case of malware attacks or other disasters.
Organizations should establish centralized log management with a security information and event management tool that can correlate logs from network and host security devices to detect anomalies. Doing this will enable companies to triage an incident more effectively, assess its implications more accurately, and plan for future actions.
2. Remove the Infected Device
Ransomware is a type of malicious software that locks down your computer, encrypts its data, and demands payment for ransom. This can be an extremely dangerous situation for any organization if confidential information or financial details are exposed.
Most often, this virus spreads via phishing emails and malicious websites, but it can also spread via physical media (such as USB drives).
Once an infection is established, it will send a signal to the perpetrator’s command and control server. They then provide a cryptographic key for the victim to decrypt. If they pay the ransom, their device will be unlocked and they can regain access to their files.
Before paying the ransom, victims should assess their damage and determine the extent of ransomware’s involvement. It’s often wise to get an expert opinion from a cybersecurity professional before proceeding.
Once identified, businesses should immediately isolate all infected devices from other network connections and shared storage to prevent ransomware from spreading throughout their infrastructure and causing further disruptions.
It is also essential to back up all systems on the network, especially those containing sensitive data. Doing so allows the business to revert back to an earlier version of its system should an infection re-occur, helping reduce its impact and minimize disruption caused by this incident.
The business should also update all passwords and security access codes as soon as possible, to reduce the risk of a second attack in the future. Furthermore, it should run antivirus scans on all infected devices to detect any hidden trojans that may still exist within them.
3. Secure Your Backups
Ransomware can wreak havoc on an organization by encrypting data and holding it hostage until a fee is paid. However, organizations can take steps to reduce their chances of becoming infected with this malicious software by following some best practices.
The initial step in protecting your data after ransomware attack should be ensuring your backups are secure. Backups are essential for recovering information following a ransomware attack and should be stored offline, preferably offsite, so they cannot be accessed from within your network (this is especially crucial when dealing with ransomware).
Immutable storage is one of the best methods to protect against ransomware attacks. This technology locks data in buckets so it cannot be altered, encrypted or deleted for an extended period of time.
Enhancing backup frequency is another effective strategy to minimize ransomware risks. For smaller organizations, backing up at least once an hour may suffice, but larger enterprises may need more frequent backups in order to meet business continuity objectives and safeguard data.
Updating your backup software and systems regularly is essential. Out-of-date software makes your backups less reliable, increasing your vulnerability to cyberattacks.
Finally, make sure all of your servers and workstations are updated with the most up-to-date security software, operating system patches, and other necessary tools. Doing this can significantly reduce the number of vulnerabilities that could be exploited.
4. Update Your Operating System
Ransomware attacks can be devastating for businesses, but the good news is that they can often be avoided with proper preparation. According to NIST, creating an effective cybersecurity and disaster recovery plan is one of the most crucial elements in creating a strong defense against these types of cyber-attacks.
The primary step in safeguarding your system from ransomware is ensuring it’s up-to-date with the most recent security patches. This applies to software, firmware and operating systems alike.
Another way to prevent ransomware attacks is being wary of what you download and click on. Malware distributors have become sophisticated, so it’s best to avoid downloading any programs that you don’t trust.
Also, avoid disclosing personal information to strangers via emails or over the phone. Cybercriminals can use this data to craft tailored phishing attacks specifically tailored towards you.
If you believe your computer to be infected with ransomware, take immediate steps to shut it down and disconnect from the Internet. Doing this will reduce its ability to spread and prevent it from encrypting any of your files.
Thankfully, there are free decryptors for some versions of ransomware; however, it’s still essential to back up your data before paying the ransom. Some ransomware variants encrypt files with a mathematical key that can only be decrypted with payment from the attacker.
5. Update Your Security Software
Ransomware is one of the most prevalent types of malware to infiltrate business networks. It typically targets organizations of all sizes, encrypting files and blocking access until a ransom payment is made to unlock them.
To protect your business from ransomware attacks, the most reliable solution is to update all computers, laptops and other devices with security software. This should include comprehensive antivirus and anti-malware tools.
Maintaining your systems with the most up-to-date software patches is essential for keeping them free of malware infections that could exploit older programs. This will help ensure your old software stays protected against newer versions, thus avoiding potential security breaches.
Additionally, it’s crucial to always have backups of your data in case the systems become infected. It is particularly essential that these copies be stored on separate devices from the infected system.
This will prevent the spread of malware infections from your infected system to other connected devices, potentially providing them with additional opportunities for attack.
Additionally, ensure all employees know how to recognize suspicious emails and avoid clicking on links in them. Security awareness training is the best way to shield your business from ransomware attacks.
Ransomware is one of the most widespread types of cyber-attack, so it is essential that your organization takes proactive measures to thwart it. These may include disconnecting the infected computer from the network, securing backups, updating computers and security software, removing the affected device, and restoring data.
6. Restore Your Data
Ransomware encrypts your files, rendering them inaccessible unless you pay. The criminals behind it understand how important your data is and want you to compensate them in order to regain access.
Restoring your data after a disaster may seem like an impossible task, but there are steps you can take to guarantee it doesn’t disappear forever. First and foremost, ensure your backups are secure and easily accessible.
Next, create a recovery plan and prioritize mission-critical assets and data. Doing this will enable you to quickly restore operations and prevent data loss.
Once your plan is in place, it’s essential to practice until it becomes second nature. Doing this will enable your incident response team to be more effective during a security breach.
It’s essential that your data recovery method is as reliable as possible, including all backups and the files necessary for recovery. Doing this can reduce downtime and the amount of data lost in case an attack occurs.
Additionally, ensure your backups are encrypted and stored off-site to protect them from ransomware attacks and enable you to restore the data necessary for operations. While this won’t completely eliminate the risk of data loss, it can greatly reduce its impact on both your business and profitability.
