Some ransomware files can be decrypted, but there is no universal method and no responsible provider can promise recovery before examining the incident. The answer depends on the ransomware variant, how encryption was implemented, the condition of the files, available keys or tools and the organisation's backups.
A decryption assessment should separate what is known from what is only assumed.
What makes decryption possible?
Decryption may be possible when a trusted key or tool is available for the identified variant, when the ransomware contains a usable implementation weakness or when responders can recover required information from preserved systems or evidence.
It may not be possible when the encryption is correctly implemented with unavailable keys, when files are damaged, when multiple variants are present or when the evidence needed to identify the attack has been destroyed.
The Cyber Security Agency of Singapore maintains a ransomware portal with incident guidance, reporting information and links to recognised decryption resources. Treat unknown download sites and unsolicited recovery claims with caution.
What an assessment needs
A specialist may ask for:
- a copy or photo of the ransom note;
- the extension added to encrypted files;
- a small encrypted sample and, where available, its original unencrypted version;
- the affected operating systems and applications;
- the approximate time encryption began;
- security alerts or indicators linked to the incident;
- information about available backups.
Use an agreed secure transfer method for file samples. Do not upload confidential business files to an unverified website or send passwords, recovery keys or sensitive documents through an initial contact channel.
Decryption, restoration and data recovery are different
Decryption applies a valid key or method to reverse the ransomware's encryption. If it works, responders still need to check file integrity and confirm that the recovered data is safe to use.
Backup restoration retrieves data from an earlier protected copy. It may be faster and more reliable than decryption when clean, recent backups exist, but the team must verify that the recovery environment is no longer compromised.
Data recovery attempts to retrieve accessible information from storage, damaged files, snapshots or other sources. Results depend on the technology and condition of the data.
System rebuilding creates a trusted operating environment again. Recovering documents alone does not remove the attacker's access or correct the weakness that allowed the incident.
A recovery plan may use more than one route.
Why the ransomware name matters
Different ransomware families and even different versions of the same family can use different encryption methods. A filename extension or ransom note can provide a clue, but it is not always conclusive. Attackers may copy another group's branding or use a customised build.
Preserve evidence and let the assessment confirm the likely variant before running a tool against important files. Testing should use safe copies, not the only available copy of affected data.
Does paying the attacker guarantee recovery?
No. Payment does not guarantee that a working key will be supplied, that the tool will complete safely or that stolen information will be deleted. It may also introduce legal, sanctions, insurance and ethical questions that require specialist advice.
The organisation should involve management, legal counsel, insurers and relevant authorities before making a decision. Do not let an artificial deadline replace an evidence-based assessment.
What successful decryption does not solve
Even when files are decrypted, the organisation still needs to investigate the entry point, remove persistence, secure accounts, rebuild affected systems where needed, validate data and review notification obligations.
A successful file test is evidence for a possible recovery route. It is not evidence that the environment is clean.
FreedomX assessment and charging model
FreedomX treats ransomware work as a separate one-time service, outside the monthly AI and managed IT subscriptions. Recovery feasibility is assessed first. The decryption fee is due only after successful decryption; incident response and other recovery work are scoped separately. No universal recovery result is guaranteed.
Start with the urgent WhatsApp intake or review the first-hour ransomware checklist.