5 Essential Steps For Ransomware Backup Strategy

There is no denying the prevalence of numerous cybersecurity threats in today’s increasingly digital world. Cybercriminals constantly exploit devices to access sensitive data, and ransomware is one of the deadliest and most effective weapons in their arsenal. Many organizations have lost critical data to ransomware attacks, so it is best to take proactive steps to prevent them. However, a ransomware backup strategy can help you recover your data after an attack.

What Is A Ransomware Attack

Ransomware is a type of malware that encrypts your digital files or locks you out of your network. When ransomware breaches a system, it searches for and encrypts valuable files using asymmetric key encryption, so only the attacker has the private key to decrypt the files. As a result, the attacker demands a ransom to decrypt the files or restore network access. Ransomware victims are typically given instructions to pay the ransom through random notices displayed on screens or in text files containing orders. Payments may range from a few hundred to several thousand dollars and are almost always made in cryptocurrency for anonymity. Ransomware is big business for cyberattackers, as a whopping $ 5 billion was lost to ransomware attacks in 2017 alone.

What Is A Target For Ransomware?

Many cybersecurity experts agree that nearly everyone is a target for ransomware, from small businesses to celebrities. Some of the popular targets of these attacks include:

• Healthcare industry – Many hospitals and medical devices run outdated software, making them relatively easy to breach. Hospitals are a favorite target for cybercriminals because they are critical institutions, as hospital officials are more likely to pay ransoms to avoid threatening patients’ lives.
• Government agencies – Government agencies are prominent and have critical, sensitive data. Therefore, these agencies are popular targets for ransomware attacks because they cannot afford to lose sensitive data.
• Mobile Devices – Mobile phones often store sensitive data, including payment information, personal media files, and online service credentials, making them a common ransomware target.
• Academic Organizations – Academic organizations are prime ransomware targets because they hold large volumes of research, intellectual property, and staff and student financial data.
• Human Resource Departments – HR systems have the personnel and financial records that make them prime targets for ransomware attacks.

How to Identify Clean Backups After a Ransomware Attack

A clean backup is a copy of business data you can safely restore without reintroducing ransomware, malware, or compromised system configurations. Businesses should identify clean backups by determining when the attacker gained access, selecting suitable recovery points, scanning restored data, and validating systems in an isolated environment before returning them to production.

How Can Businesses Identify a Clean Backup?

Businesses can identify a clean backup by reviewing security logs, determining the likely compromise period, and checking recovery points that predate suspicious activity. The most recent backup is not always the safest option because attackers may remain undetected before launching a ransomware attack.

IT teams should follow these steps:

• Identify the compromise timeline: Review security alerts, authentication records, endpoint logs, and suspicious backup activity to estimate when the attack began.
• Select suitable recovery points: Prioritize backups created before suspected malicious activity, while considering whether the attacker may have accessed the environment earlier.
• Scan and validate restored data: Use trusted security tools to examine files and restored systems for malware, suspicious accounts, unauthorized changes, and other indicators of compromise.
• Test recovery in isolation: Restore candidate backups in a controlled environment and verify that applications, databases, and essential services work correctly before reconnecting them to the production network.

If the compromise timeline is uncertain, compare multiple recovery points and involve incident response specialists. An older backup isn’t automatically clean, and a successful malware scan alone doesn’t guarantee a system is safe.

How to Prioritize Recovery After a Ransomware Attack

Ransomware recovery prioritization is the process of deciding which systems, applications, and data businesses must restore first to resume critical operations. Businesses should prioritize recovery based on operational impact, system dependencies, security requirements, and each service’s maximum acceptable downtime.

Which Systems Should Businesses Restore First After Ransomware?

Businesses should first restore clean infrastructure and essential services that support other systems, then critical business applications and lower-priority workloads. The exact sequence depends on the affected environment and system dependencies.

A typical recovery sequence includes:

• Essential infrastructure: Restore and validate core networking, identity and access services, and security controls required for safe system operation.
• Critical applications and databases: Recover systems that support essential transactions, customer services, or time-sensitive business processes.
• Supporting business applications: Restore collaboration platforms, internal applications, and other services needed for normal operations.
• Lower-priority systems: Recover nonessential applications and workloads that can remain unavailable longer without unacceptable business impact.

Before reconnecting any restored system, verify that the relevant compromise has been contained, security controls are functioning, and the application and its data operate correctly. Business owners should confirm that critical services are ready for use.

How to Identify Clean Backups After a Ransomware Attack

A clean backup is a copy of business data that can be safely restored without reintroducing ransomware, malware, or compromised system configurations. Businesses should identify clean backups by determining when the attacker gained access, selecting suitable recovery points, scanning restored data, and validating systems in an isolated environment before returning them to production.

How Can Businesses Identify a Clean Backup?

Businesses can identify a clean backup by reviewing security logs, determining the likely compromise period, and checking recovery points that predate suspicious activity. The most recent backup is not always the safest option because attackers may remain undetected before launching a ransomware attack.

IT teams should follow these steps:

• Identify the compromise timeline: Review security alerts, authentication records, endpoint logs, and suspicious backup activity to estimate when the attack began.
• Select suitable recovery points: Prioritize backups created before suspected malicious activity, while considering whether the attacker may have accessed the environment earlier.
• Scan and validate restored data: Use trusted security tools to examine files and restored systems for malware, suspicious accounts, unauthorized changes, and other indicators of compromise.
• Test recovery in isolation: Restore candidate backups in a controlled environment and verify that applications, databases, and essential services work correctly before reconnecting them to the production network.

If the compromise timeline is uncertain, compare multiple recovery points and involve incident response specialists. An older backup isn’t automatically clean, and a successful malware scan alone doesn’t guarantee a system is safe.

How to Prioritize Recovery After a Ransomware Attack

Ransomware recovery prioritization is the process of deciding which systems, applications, and data businesses must restore first to resume critical operations. Businesses should prioritize recovery based on operational impact, system dependencies, security requirements, and each service’s maximum acceptable downtime.

Which Systems Should Businesses Restore First After Ransomware?

Businesses should first restore clean infrastructure and essential services that support other systems, then critical business applications and lower-priority workloads. The exact sequence depends on the affected environment and system dependencies.

A typical recovery sequence includes:

• Essential infrastructure: Restore and validate core networking, identity and access services, and security controls required for safe system operation.
• Critical applications and databases: Recover systems that support essential transactions, customer services, or time-sensitive business processes.
• Supporting business applications: Restore collaboration platforms, internal applications, and other services needed for normal operations.
• Lower-priority systems: Recover nonessential applications and workloads that can remain unavailable longer without unacceptable business impact.

Before reconnecting any restored system, verify that the relevant compromise has been contained, security controls are functioning, and the application and its data operate correctly. Business owners should confirm that critical services are ready for use.

How RTO and RPO Shape a Ransomware Backup Strategy

Recovery time objective (RTO) is the target time within which a business aims to restore a system or service after a disruption. Recovery point objective (RPO) is the maximum targeted data loss, measured as the time period before the disruption. Businesses use these objectives to determine how quickly systems must recover and how frequently their data needs protection.

What Is the Difference Between RTO and RPO?

RTO measures how long a business can tolerate a service being unavailable, while RPO measures how much recent data the business can afford to lose.

For example, if a business sets an RTO of four hours, it aims to restore the affected service within four hours. If it sets an RPO of 30 minutes, it aims to limit data loss to transactions or changes made within the 30 minutes preceding the disruption.

These are recovery targets, not guarantees. Actual recovery times and data loss depend on backup availability, system dependencies, recovery capacity, and the incident’s nature.

How Should Businesses Set RTO and RPO for Ransomware Recovery?

Businesses should set RTO and RPO based on each application’s operational importance, the impact of downtime, and how much data the organization can afford to lose.

• Set RTO by business impact: Identify how long each critical service can remain unavailable before operations, revenue, or customer commitments are affected.
• Set RPO by data loss tolerance: Determine how much recent data the business can afford to lose for each application or dataset.
• Align backup schedules with RPO: Choose backup frequency and complementary data protection methods that support the required recovery point.
• Validate recovery against RTO: Test complete restoration procedures, including infrastructure preparation, security checks, application recovery, and business validation.
• Review results and adjust: If recovery exercises fail to meet the targets, improve backup processes, recovery capacity, or restoration procedures.

For example, a business that processes frequent customer transactions may need a shorter RPO than an internal document archive. Similarly, a customer-facing application may need a shorter RTO than a nonessential internal reporting tool.

By defining and testing RTO and RPO for critical systems, businesses can build a ransomware backup strategy that aligns technical recovery capabilities with operational requirements.

How To Protect Backup From Ransomware

A strong ransomware data backup strategy is crucial to protect yourself against ransomware. If ransomware fails to encrypt your backed-up data when it strikes, you can recover quickly without paying a ransom. Some of the best ways to protect your backups from ransomware include:

• Keep a secondary offline backup – Ransomware can attack anything the infected system can access. Although your end users may not be backup administrators, your backups can become infected indirectly. In such cases, you will lose the primary copy of the data and the backup copies, and you may have no other way to access your data besides paying the ransom. Therefore, back up your data to sources disconnected from your system, like removable media, and keep these devices in a safe place until needed.
• Use immutable storage – Immutable object storage can store your essential data in a bucket and lock it to block further modification. Immutable storage can secure your backups from ransomware attacks by keeping them unchanged.
• Backup Frequently – Your backup frequency determines how much data you could potentially lose in a ransomware attack. As such, many experts recommend backing up critical data at least once hourly.

Using Backup To Protect Against Ransomware: Top 5 Steps

1. Review And Update Backup Policies

Backup is only effective when robust and thorough. So, strong backup policies should be the core of your ransomware backup strategy. For instance, you can adopt the 3-1-1 rule: make three copies of data, keep two in different forms and media, and store one off-site to isolate it from the business network.

2. Air Gap Business Data

Although cloud storage can protect data from physical destruction, it does not automatically protect against ransomware. Therefore, backups using traditional media like tape are crucial to supplement cloud backups, which can serve as the off-site copy.

3. Make Regular Backups And Review Retention Policies

Organizations need to back up their data often. CIOs must also review policies for frequent backups, particularly how often data is backed up to off-site locations and traditional media. IT teams must also check how long they keep copies, since ransomware can use delays to avoid detection.

4. Ensure Backups Are Clean And Robust

System patching, up-to-date malware detection tools, and strict air-gap policies can help organizations keep backups malware-free. You can use ‘write once read many’ (WORM) media like optical disks for added protection. Lastly, limiting access to essential data stores can halt ransomware spread and make backups more secure.

5. Test And Plan

Test backup and recovery plans to calculate recovery times and determine what data is recoverable. To do this, you can test all the phases of your recovery plan using duplicate media.

Why Choose Externetworks For Managed Ransomware?

We offer completely managed ransomware services to secure your company from attacks. We also take a proactive approach to identify and neutralize the latest threats while reducing your risk. Also, our technicians move swiftly in the event of an attack, minimizing data loss and downtime. Please contact us today at www.extnoc.com to get started.