Encrypted backup files or systems
Are you having problems restoring your data from a backup?
Has your backup system fallen victim to human error, a bug or a cyber attack? We'll help you recover your data from accidental deletion, formatting, malware, ransomware.
VEEAM, ACRONIS, ARCSERVE, ALTARO, EASUS, NAKIVO, QUEST, SYNOLOGY
Customised solutions tailored to your company's specific needs
Secure transfers Independent laboratory for over 20 years.
Data recovery for encrypted backups
We have developed a suite of proprietary software that enables us to restore data from ransomware-encrypted backup systems.
SosRansomware has a unique R&D unit, where we use our own resources to develop new solutions or adapt existing technologies, enabling us to respond immediately to new demands or new data loss scenarios, including new cyber-attacks.
Supported backup files
The file types we encounter most frequently :
Other types of backup file we can process
- Altaro
- Easus
- Nakivo
- Quest
- Synology Hyper Backup
- etc
If your backup file type isn’t on this list, don’t worry, we can recover data from any software.
FREE EVALUATION
on backups cases until JUNE 30th, 2025
How SOSRansomware recovers data from infected backups?
Restoring data from a corrupted backup can be extremely complex because the loss of backup data can occur at different levels.
Hardware layer
Operating system
Virtualisation
Files
Causes and symptoms of data loss on backups
Encrypted backup files
Deleted backup files
NAS systems reset
Partial backups
Unreadable LTO tapes
Loss of access to stored/archived data (e.g. hardware failure, software no longer starts or loss of knowledge of previously used backup software)
How can backup systems be damaged by ransomware?
Your back-ups, once your lifeline, are now the main target of the most sophisticated cyber-attacks.
Hackers no longer just steal your data, they methodically make it inaccessible.
In less than two hours, your files, virtual machines and back-ups can be partially encrypted. These targeted attacks, often carried out at the weekend, paralyse your systems and jeopardise your business.’
But don’t be discouraged: our experts and our cutting-edge technology are here to help you recover your data…

Testimonials
Success stories
Corrupt postregre SQL database backup .BACKUP
The official decompression tool does not work.
We use our proprietary tool and 90% of the data is recovered..
Postregre SQL database backup corrupted .BACKUP !
The official decompression tool does not work.
We use our proprietary tool and 90% of the data is recovered.

Why can SOS Ransomware help you?
With over 250+ ransomware cases, we have adapted our tools and processes to achieve success.
Since 2019, we have been developing our tools specifically for recovering data from encrypted files.
Our software has been rewritten to process damaged files even faster.
We offer to prove our expertise with a free analysis of a corrupt file of your choice. Just send it to us.
Two main backup recovery modes: in the laboratory or remotely
Our 10 Gb/s access enables us to be very responsive and fast during exchanges, in the event of remote recovery. Security is our priority: we use the SFTP protocol exclusively for transfers. The integrity of the files is checked on arrival, so you can be sure that the files are 100% identical.
The majority of our recoveries still take place in our laboratories. The main advantage: we have more recovery options with physical servers than with downloaded files. Laboratory recovery is essential in cases of deletion where data has actually been deleted.
This type of recovery is becoming increasingly common in our business. The advantage is that there is no physical transport of the machines or disks, so there are logistical savings and no risk of damage in transit. There are no customs issues to consider... Your server can remain online if services are running on it.
Our recovery process
We have over 20 years’ experience in data recovery. Call on the French leader, our expertise enables us to provide you with a top-level response. We have in-depth knowledge of the different types of ransomware and the techniques used to combat them.
free of charge or for a fee, depending on the deadline and file type.
Your storage media are supported. We carry out systematic cloning to avoid damaging the evidence in the event of an investigation.
Extraction of priority data, validity testing and creation of a list of recovered files. Then secure restoration and resumption of activities.
Extraction of priority data, validity testing and creation of a list of recovered files. Then secure restoration and resumption of activities.
How fast do you need your data?
We offer flexible service packages to meet your unique needs and budgetary considerations.
- On-call processing
- 365/24
- Dedicated team
- Average 1 to 3 working days
- Treatment urgent
in the business hours
- 1 dedicated engineer
- Average 3-7 working days
- Treatment during theworking hours
- 1 shared engineer
- Average 7 to 14 working days
Request a free evaluation
Contact us to recover your data from files corrupted, damaged or encrypted by ransomware.
FAQ
Frequently asked questions
Everything you need to know about data recovery services for corrupted files
Immediately disconnect the affected backup system from the network to prevent further encryption or data corruption.
Check if any offline or cloud backups remain unaffected.
Identify the ransomware variant using available cybersecurity tools.
Do not pay the ransom unless it's the absolute last resort. Paying does not guarantee recovery.
Contact us for analysis and possible decryption options.
Recovery is possible if you have a separate, unaffected backup, such as an offline or cloud version.
Some ransomware variants have publicly available decryption tools—check security websites like No More Ransom (nomoreransom.org).
We may help if partial data can be salvaged from the encrypted backup.
Check for unusual file extensions (e.g., .locked, .encrypted, .ransom).
Attempt to open files; if they are unreadable or demand ransom notes appear, they are likely encrypted.
Monitor for sudden large-scale changes in file structure or timestamps.
Contact your cloud provider immediately for potential rollback options.
Check if versioning is enabled to restore an unencrypted version.
Disable automatic sync to prevent further encryption.
Security experts generally advise against paying the ransom, as it funds cybercrime and offers no guarantee of recovery.
If no backups exist, consult us and law enforcement before making a decision.
Depending on your location and industry, data breaches may require legal reporting to authorities.
Paying ransom may violate regulations, especially if the attackers are on sanctioned lists.
Seek legal counsel if sensitive or customer data is involved.
Yes, but success depends on the ransomware type and encryption strength.
We are specialized in data recovery and ransomware decryption.
Before hiring, verify their credibility and avoid scams promising instant decryption.
Blog ressources


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Related services
In addition to recovering files encrypted by ransomware, we also intervene on complex systems such as Hyper-V, VMware or RAID. Our specialized services guarantee rapid restoration of your critical data, whatever your technical environment.
Data recovery from Hyper-V virtual machines, even in the event of corruption or failure.
Data recovery from degraded or failed RAID systems, whatever the configuration.
Expertise in restoring damaged or inaccessible VMware virtual machines.
Restore ransomware-encrypted files with advanced, secure solutions.