Synology Ransomware Incident for NAS Security
What NAS administrators can learn from the Synology Ransomware Incident
Ransomware attacks on NAS systems are not just possible risks. They are real events that have effects on operations, finances, and reputation. A widely reported incident in which NAS devices were attacked with brute force showed how even reliable platforms can be put at risk by security settings that aren’t set up correctly.
The incident was stopped by working together on cybersecurity across borders, but the lesson still applies to businesses in 2025 and 2026. Storage systems should not be thought of as passive file repositories; they should be thought of as security-critical infrastructure.
How the Attack Happened
The investigation showed that the ransomware did not take advantage of any software flaws. Instead, attackers got in by using brute-force methods on weak credentials, mostly going after default or poorly protected administrative accounts.
After getting administrative access, the attackers encrypted the data that was stored and asked for money. This attack pattern shows something that happens a lot in modern events. Most of the time, security problems come from poor management of identities and access, not from bugs in the software.
Why NAS Systems Are Important Targets
NAS platforms bring together important assets. They often keep backups, production data, archives, and credentials for services that work together. For attackers, breaking into a NAS can have the biggest effect with the least amount of work.
NAS systems often stay online all the time, unlike endpoint devices, and they may be open to the internet for remote access. This exposure creates attack surfaces that are always there without the right controls.
The first line of defense is credential security
The event showed how dangerous it is to have weak passwords and default administrative accounts. Brute-force attacks work when systems let people try to log in again and again without any effective defenses.
This risk is greatly lowered by turning off default admin accounts, making strong password rules, and allowing multi-factor authentication. Automated IP blocking makes things even safer by stopping repeated login attempts from bad sources.
Network exposure needs to be kept to a minimum
A lot of the systems that were affected could be accessed directly from the internet. Opening up management interfaces without layered protection makes things much more dangerous.
Backups are the last thing you should do
No system is completely safe, even with strong preventive controls. Backups decide if ransomware is a recoverable incident or a business crisis.
You can get your data back without paying a ransom if you have multi-version backups stored offsite or in places that can’t be changed. It’s also important to test backups on a regular basis. Backups that haven’t been tested give you false confidence.
Monitoring and catching things early are important
Before an attack works, security logs often show warning signs. Repeated failed login attempts, strange patterns of access, and changes to the configuration are all early signs.
Companies that keep an eye on NAS logs can find attacks while they are still in the reconnaissance or brute-force stages. Logging without reviewing it passively doesn’t offer much protection.
Putting Synology’s security features in context
Synology platforms come with security features like account protection, firewall controls, security advisors, logging, and backup solutions. When these features are set up right, they lower risk by a lot.
But just having platform capability isn’t enough. The way systems are set up, run, and watched over affects security outcomes. The event showed that safe configuration is just as important as safe software.
Making Policy Out of Lessons Learned from Incidents
Instead of seeing ransomware attacks as one-time events, businesses should see them as design feedback. Policies should require safe account practices, limited access, verified backups, and regular security checks.
After making changes to the system, hiring new staff, or needing new access, security settings should be checked. As environments change, static configurations get worse over time.
About the Epis Technology
Epis Technology helps businesses protect their NAS environments from attacks that use ransomware and stolen credentials. The company focuses on helping businesses with Synology, enterprise storage architecture, backups for Microsoft 365 and Google Workspace, fully managed PC backups, and planning for business continuity. Epis Technology helps businesses make their NAS security settings stronger, design backup systems that can withstand failures, set up monitoring and incident response procedures, and lower the chance of losing data to ransomware and unauthorized access.