Ransomware in SMBs: Why the Attack Is Only the Beginning of the Problem

Ransomware in SMBs: Why the Attack Is Only the Beginning of the Problem

Monday morning, 8:15 AM. Your team arrives at the office. Workstations won't open. Shared files are inaccessible. A message appears on screens: your data has been encrypted. A ransom is demanded.

This is the classic ransomware scenario. What most SMBs do not know is that this moment is not the start of the attack. It is the end of an intrusion that may have been ongoing for weeks — and the beginning of a regulatory problem that very few organizations anticipate.

Double Extortion: A Change in the Rules

For a long time, ransomware attacks followed a simple pattern: encrypt the data, demand a ransom, recover through backups. Well-prepared organizations got through it without paying.

Attackers adapted. Today, the dominant technique is double extortion: before encrypting your data, attackers exfiltrate it. They hold two levers: the decryption key on one side, the threat of publishing your data on the dark web on the other.

The result: even with a perfect backup, you cannot simply restore and move on. Your personal data — that of your clients, employees, and partners — is already in their hands.

The GDPR Problem Nobody Explains to You

This is where it becomes critical for the DPO and CIO.

Article 33 of the GDPR imposes a clear obligation: in the event of a personal data breach, you must notify the supervisory authority within 72 hours of becoming aware of the incident.

72 hours. That is the time you have to:

• Identify the personal data involved

• Assess the level of risk to the individuals concerned

• Draft and submit the notification to the authority

• Decide whether the affected individuals must be informed (Art. 34)
  

In an SMB under ransomware attack, this deadline is nearly impossible to meet if you do not know what you store.

Which personal data was exfiltrated? Social security numbers? Health data? Banking details? Data relating to minors? The answer to these questions determines the severity of the incident, the notification obligations, and the level of potential sanctions.

If you have no mapping of your personal data before the attack, you cannot answer these questions in 72 hours. And failure to notify within the deadline is itself a GDPR infringement — a second sanction on top of the first.

SMBs: Primary Targets, Less Protected

The numbers are unambiguous. According to the ANSSI Panorama de la cybermenace 2024, SMBs, micro-businesses, and mid-size companies represent 37% of ransomware victims known to the Agency — the leading category ahead of local authorities (17%) and higher education institutions (12%).

The trend is not reversing. In 2025, this figure rises to 48% according to the ANSSI Panorama de la cybermenace 2025 (CERTFR-2026-CTI-002). Small structures remain the most exploited targets, precisely because they have fewer resources to defend themselves and to respond to an incident.

Meanwhile, incidents involving data exfiltration have jumped +51% between 2024 and 2025. Attackers steal data before encrypting it — sometimes without ever encrypting, to stay discreet and apply direct blackmail pressure.

What the Incident Reveals That You Did Not Know

A ransomware attack with data exfiltration acts as a forced, brutal audit of your data assets. It reveals in a matter of hours what you should have known for a long time:

• What personal data was living on your network shares?

• Who had access and since when?

• Was that data encrypted at rest?

• Did some files contain sensitive data under Article 9 of the GDPR — health data, social security numbers, trade union information?

Without answers to these questions, the regulatory notification becomes an approximation. And in 2025, European authorities recorded a 22% increase in breach notifications, reaching an average of 443 notifications per day (DLA Piper GDPR Fines and Data Breach Survey 2026). Oversight is intensifying. Requirements are tightening.

Regaining Control Before the Incident

The only effective response is preventive. It is not about backing up better — although that is necessary. It is about knowing what you store, where, and since when, before an attacker reveals it for you.

That is what APOLLO Data Auditor enables:

• Automatic mapping of personal data: 44 PII types detected, regardless of location — local files, NAS, databases, cloud, Active Directory

• Identification of Art. 9 sensitive data: social security numbers, health data, biometric data — the categories that automatically aggravate incident qualification

• Exposure score by source: in the event of an incident, you immediately know which zones are affected and the regulatory severity

• Inventory ready for regulatory notification: the elements required to draft your notification are available from the moment the incident is discovered

  Deployable in 48 hours, without a dedicated team, without modifying your infrastructure.
  
  

Conclusion: The Attack Reveals What an Audit Should Have Found

Ransomware is not only a threat to your operational continuity. It is a revealer of what you do not know about your own data. And in a regulatory environment where the 72 hours of Article 33 are non-negotiable, not knowing what you store is a risk in itself.

The question is not "if" an attack will happen. It is "when" — and whether you will be able to notify the supervisory authority within the deadline.

→ [Discover how APOLLO Data Auditor prepares your incident response]

Sources

• ANSSI Panorama de la cybermenace 2024 — CERTFR-2025-CTI-003 — cyber.gouv.fr

• ANSSI Panorama de la cybermenace 2025 — CERTFR-2026-CTI-002 — cert.ssi.gouv.fr

• Art. 33 GDPR — Notification to the supervisory authority in the event of a personal data breach

• Art. 34 GDPR — Communication to the data subject of a personal data breach

• DLA Piper GDPR Fines and Data Breach Survey 2026 — dlapiper.com

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