Ransomware decryption
How can I recover data encrypted by ransomware?
Victim of a cyberattack, your files have been encrypted by ransomware?
Don’t panic—at SOS Ransomware, we understand the urgency and critical nature of the situation. We specialize in recovering data encrypted by ransomware.
To assist you in the event of a ransomware cyberattack emergency, we have developed a specialized expertise in ransomware data recovery. Over our 20 years of existence, we have handled more than 100,000 data recovery interventions. Over time, our organization has established itself as a benchmark in this particularly complex field.
The challenge of ransomware decryption
The process of decrypting ransomware represents a significant technical challenge that varies depending on the specific type of malware. It’s important to note that an improper approach can permanently compromise the chances of successful data recovery.
A methodical approach
The first essential step is to accurately identify the type of ransomware involved. To do so, resources such as ID Ransomware or the No More Ransom Project can analyze the ransom note or an encrypted file to determine the exact family of the malware.
Once identification is complete, several decryption solutions may be considered. Many cybersecurity companies have developed free tools to counter various ransomware families. Trend Micro offers a decryptor compatible with a wide range of variants, while Kaspersky, Emsisoft, and Avast also offer specific solutions for certain ransomware families.
However, it’s important to understand the technical limitations of these tools. The sophisticated encryption methods used by some ransomware can make decryption extremely difficult without the private key held by the attackers. In some cases, only partial data recovery may be possible.
Regarding ransom payment, we strongly advise against choosing this option. Not only does it not guarantee the recovery of your files, but it also encourages the proliferation of these criminal activities—and increases the risk of future attacks.
How does ransomware lock your files?
Ransomware uses a method called encryption to lock your files. It’s like changing the language of your files into a secret code that only the ransomware knows. The most common method is symmetric encryption, where the same secret code is used to both lock and unlock the files. This secret code is created on your computer when the ransomware sneaks in, then sent back to the cybercriminals’ server.
Emergency measures to be taken
Isolate compromised devices
It's essential to isolate infected systems to prevent the ransomware from spreading to other devices or networks. Disconnect affected devices from the web and other devices, but avoid rebooting or shutting them down.
Examine compromised devices
Use an up-to-date antivirus or antimalware program to scan affected devices. This will help you identify the nature of the ransomware and its specific features.
Assess the extent of the infection
It's still essential to determine which documents, equipment or devices have been affected, and which variant of ransomware is involved.
Preserve indexes
Keep all items related to the attack, such as the ransom note, suspicious emails or attached files. This information can be crucial for subsequent investigations.
Restore data from backups
If you have recent, reliable backups, consider restoring them to secure devices. Make sure these backups are intact and compatible with the destination devices. This goes without saying, but don't restore contaminated backups...
Is your business at a standstill, your IT system paralyzed?
How do you respond to a Ransomware incident?
Don’t panic, all is not lost – far from it!
SOS Ransomware is with you every step of the way, from data recovery to business resumption.
We recommend that you take the following steps now.
Contain the infection by isolating your machines from the Internet
Don't try to contact your attackers, don't pay ransom
Don't wait, our teams know how to act
Where can I find help?
Beyond the standard publicly available solutions, SOS Ransomware has developed a suite of proprietary software and techniques designed to operate in particularly complex situations. Our team of experts conducts an in-depth analysis of the attack’s characteristics, applies advanced reverse engineering techniques, and uses specialized tools to maximize the chances of recovery.
Given the increasing complexity of ransomware threats, relying on a professional service like SOS Ransomware saves time and improves the likelihood of data recovery. Our cybersecurity support experts are trained to respond quickly:
Technical evaluation
We identify the ransomware strain and assess the feasibility of decryption or restoration from backups.
We explore all recovery options, including those related to your storage media.
Deployment of appropriate tools
Thanks to an extensive knowledge base, we use the latest ransomware decryption solutions or develop new methods if necessary.
Reporting and proof
After the recovery phase, we provide you with evidence of the attack.
Why is a rapid response essential?
When ransomware infiltrates a network, every minute becomes critical. The longer detection and response are delayed, the more cybercriminals can encrypt sensitive files and make the situation highly critical.
That’s why, by reacting quickly, you drastically reduce the impact of the cyberattack on your operations, avoid having a larger number of unusable files, and significantly increase your chances of recovering intact data.
Contacting a professional ransomware decryption service at the first signs of an attack (ransom note, unexplained slowdowns, antivirus alerts) is strongly recommended. This rapid response will help you reduce potential costs and resume your activity quickly.
Get super-fast 24/7 data recovery with SOS Ransomware! Our emergency unit is in action in less than 60 minutes, guaranteeing the safe return of your data.
Give yourself every chance of recovering your data with SOS Ransomware
Call us as soon as possible! Don’t take any more risks! Any hasty decision based on panic can considerably reduce your chances of recovering your data.
Our laboratories
Our laboratories are located in France (Paris)
Emergency: + 33 01 84 60 41 12 (24/7)
or + 33 6 08 68 94 98
WhatsApp : 07 74 77 62 57
France:
36 rue Laborde
75008 Paris 8
28 levee du Renaison
42300 Roanne
FAQ
Frequently asked questions
This FAQ provides clear, concise answers to the most frequently asked questions about ransomware, how to decrypt it and how we can help. From prevention to complete data recovery, find out how to react quickly, strengthen your digital defense and minimize the impact of any attack.
Ransomware is a type of malware that encrypts files on your computer, making them inaccessible. Usually, after encryption, a ransomware message appears, demanding payment (often in cryptocurrency) in exchange for the decryption key to restore your data. The impact can range from the simple loss of access to personal data to the complete paralysis of a company's operations. Some ransomware groups also practice double extortion, threatening to release stolen data if the ransom is not paid.
The first crucial step is not to panic. Avoid paying the ransom immediately, as there's no guarantee that you'll get your files back, and this encourages cybercriminals. Isolate the infected device from the network to prevent the ransomware from spreading to other systems. Document the attack by taking screenshots of the ransom message and noting all relevant details. Then contact cybersecurity professionals or consult reliable online resources such as the "No More Ransom" project or the websites of antivirus vendors (Avast, Kaspersky, Trend Micro, Emsisoft, etc.) to identify the type of ransomware and see if a free decryption tool is available.
Yes, in many cases, free decryption tools are available. Organizations such as the "No More Ransom" project, as well as cybersecurity companies such as Kaspersky, Avast, Trend Micro and Emsisoft, develop and make available these tools for specific ransomware families. The availability of a tool depends on the type of ransomware that has encrypted your files. It is essential to correctly identify the strain of ransomware in order to use the appropriate tool. Platforms like "ID Ransomware" can help you identify the ransomware by analyzing examples of encrypted files or the ransom note.
If no free decryption tools are available for the ransomware strain that has infected you, your options are limited and risky. You may want to consider professional data recovery services that specialize in ransomware, such as SOS Ransomware. We have proprietary tools and methods that usually recover data. Paying the ransom is another option, but is strongly discouraged as it encourages criminal activity and does not guarantee the recovery of your files, or even encourages a next attack. What's more, cybercriminals may not provide the decryption key or demand an additional ransom. In some cases, if data is highly sensitive and has been exfiltrated, negotiation services may be considered in an attempt to prevent its distribution.
Identifying the type of ransomware is crucial to finding an appropriate decryption tool. Several clues can help you:
The ransom note: Take a close look at the contents of the ransom note. It often contains the name of the ransomware or a contact name (email, website on the dark web). Platforms such as "ID Ransomware" allow you to submit the note to attempt identification.
Encrypted file extension: Many ransomware programs modify the extension of encrypted files. This extension is often unique to a specific ransomware family. For example, ".crypt" was used by CryptXXX, while Jigsaw added random or recognizable extensions such as ".fun".
Online identification tools: Use services like "ID Ransomware" to download a sample encrypted file and/or the ransom note. The tool will attempt to match this information with known ransomware signatures.