How much does a ransomware attack cost? The real impact on businesses and how to reduce it

Ransomware is no longer just an IT problem. In Europe, ransomware attacks have increased by 116% in recent periods, while the average cost of a data breach reaches $3.9 million. In addition, a business disruption can cost between €4,000 and €7,500 per minute.

And the ransom is only one part of the cost. Restoring systems, investigating the incident, responding to potential data exposure, and dealing with business disruption can multiply the initial financial impact.

That is why, to understand how much a ransomware attack can really cost, it is necessary to look beyond the amount demanded by the attacker.

How much does a ransomware attack really cost?

The impact of ransomware can affect virtually every area of an organization. The first consequence is usually business disruption, but other costs related to incident recovery and management quickly follow.

Some of the main costs include:

• Operational downtime: critical systems, applications, or equipment may become unavailable for hours or days.
• Technology recovery: restoring affected servers, devices, applications, and data.
• Information exposure: if attackers have exfiltrated data, the company must determine what information has been compromised.
• Legal and regulatory costs: an incident involving personal data may create investigation, notification, and response obligations.
• Lost business: customers who cannot receive orders, use services, or continue working can result in direct financial losses.
• Reputational impact: a company that cannot guarantee the security of its information may lose the trust of customers and suppliers.

Therefore, the cost of ransomware is not limited to the ransom. In many cases, the business disruption itself becomes one of the most significant components of the financial impact.

Real-world cases: when ransomware brings entire operations to a halt

The impact can be particularly significant when an attack affects organizations that rely on digital systems to maintain their operations.

In 2024, EquiLend, a platform used by major financial institutions for securities lending operations, suffered an attack attributed to LockBit that left some of its systems unavailable for more than ten days. The incident demonstrates how an attack against a single provider can ultimately affect organizations across an entire financial ecosystem.

The risk is not limited to large corporations. Mid-sized businesses can become attractive targets precisely because they often have smaller infrastructures and fewer internal resources dedicated to security. For these organizations, prolonged downtime can directly affect revenue, production, customer service, and their ability to restore operations.

How does ransomware get into a business?

Before encrypting systems, attackers need to gain an initial foothold and move through the infrastructure. That is why there are certain areas that should be reviewed regularly:

• Credentials without MFA: a compromised password can provide initial access to corporate services.
• Lack of monitoring: without continuous monitoring, lateral movement, anomalous access, or large-scale downloads can go unnoticed.
• Unpatched vulnerabilities: outdated systems or exposed applications can become an entry point.
• Unassessed vendors: a vulnerability in a third party can ultimately affect your own infrastructure.
• Backups accessible from the network: if backups are connected, they can also be encrypted during an attack.

Understanding these weaknesses makes it possible to take action before an attacker can turn an initial foothold into a complete business disruption.

What should you do if you detect a ransomware attack?

When ransomware appears on a corporate device, server, or system, the first few hours are critical. The goal should be to contain the incident and prevent it from spreading further.

1. Isolate affected systems. Disconnect compromised devices from the network to limit lateral movement and prevent encryption from reaching other systems.
2. Preserve incident information. Do not delete evidence before analyzing what happened. Logs and affected systems may be necessary to determine the scope of the attack.
3. Review and secure credentials. Change compromised credentials, especially administrative accounts, and revoke sessions that may still be active.
4. Assess the impact. Determine which systems and data have been affected and whether personal or confidential information may have been exposed.
5. Activate the response plan. Involve the IT team, cybersecurity provider, and, where appropriate, legal and compliance teams.

A fast and coordinated response can make a significant difference between a contained incident and prolonged business disruption.

How can you reduce the financial impact of ransomware?

It is not always possible to completely prevent an attack, but it is possible to significantly reduce the likelihood of success and limit its consequences.

Continuous monitoring and response

24/7 monitoring makes it possible to detect suspicious access, lateral movement, and anomalous behavior as it happens. Having response capabilities allows organizations to act before the threat reaches critical systems.

Access control and MFA

Applying the principle of least privilege and multifactor authentication reduces the chances that compromised credentials can provide access to critical resources.

Verified backups

Backups must be protected against ransomware itself and, above all, regularly tested to ensure they can be restored. A backup that cannot be recovered does not guarantee business continuity.

Security audits and testing

Security audits and penetration testing help identify vulnerabilities before attackers can exploit them and verify whether existing security measures actually work.

Phishing awareness training

A significant number of attacks begin with social engineering. Training employees and conducting regular simulations helps reduce the risk of a fraudulent email becoming the entry point for ransomware.

ESED, proactive cybersecurity

The real cost of ransomware does not begin when the ransom note appears. It begins when the company loses access to its systems, stops operating, and needs to rebuild its infrastructure while investigating what information may have been compromised.

That is why the most effective strategy is not simply to prepare for recovery, but to detect and contain the attack before it can encrypt critical systems.

At ESED, we work with a managed cybersecurity model based on prevention, continuous monitoring, and response, helping businesses keep their systems monitored 24/7 and respond to threats before they become business disruptions.

We also work with a fixed monthly fee, allowing businesses to plan their cybersecurity investment without relying on unexpected costs when an incident occurs.