The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Identify the ransomware family, obtain a decryptor only from an official source, and follow that tool’s exact instructions for testing it. If the tool supports a non-destructive test or a matching original-and-encrypted sample, use that procedure on a preserved copy before attempting wider recovery. A successful test is useful evidence—not a guarantee that every file can be restored. CISA, the FBI and the NSA strongly discourage paying: payment does not guarantee recovery.
What a decryptor test can—and cannot—tell you
A decryptor works only under the conditions it supports, which may depend on the ransomware family or variant, the affected files and the system. A test can help establish whether a particular tool appears to work on a particular sample. It cannot establish a universal success rate or guarantee that all affected data will be recovered; the official manuals cited here provide no general success rate.
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Testing methods differ by tool. For example, the Rhysida manual describes a testing mode intended to check whether decryption would work without changing files. The DoNex manual describes using a matching original and encrypted sample to recover a key and recommends an original sample of at least 1 MB. These are specific instructions for those decryptors, not general procedures to try with other tools. Read the official tool instructions before running anything.
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Do not choose a decryptor just because its name or download page resembles the ransom note. Start with No More Ransom’s Crypto Sheriff, which accepts ransom-note information and encrypted files up to 1 MB to check whether a solution is available. Consider the data-handling implications before uploading any file; do not submit sensitive material unless you are comfortable sharing it with the service.
#1 Best Overall
- Slim durable design to help take your important files with you
- Vast capacities up to 6TB[1] to store your photos, videos, music, important documents and more
- Back up smarter with included device management software[2] with defense against ransomware
- Help secure your important files with password protection and hardware encryption
- 3-year limited warranty
Ransom-note wording and file extensions can help with identification, but should not be treated as conclusive proof on their own. For an organization or an incident affecting multiple systems, involve qualified incident responders and consult law enforcement rather than relying on a guessed family match.
Verify the tool and its instructions
- Confirm the family match: Check that the official listing or publisher says the tool supports the ransomware family or variant you identified.
- Check the source: Get the tool from No More Ransom’s decryptor directory or an official vendor or law-enforcement page. Avoid arbitrary executables advertised as decryptors.
- Read the manual before downloading or starting the tool: Look for prerequisites, supported file types, operating conditions, and an explicit test or sample-validation procedure.
- Check what the test does: Determine whether it is documented as non-destructive or whether it requires a matching original and encrypted sample. Do not assume every decryptor has a safe test mode.
- Preserve your recovery options: Keep the original encrypted files and incident evidence, and make a separate copy or disk image before using the tool where feasible.
Tool listings and compatibility can change. Recheck the current official page and instructions instead of relying on an old copy or a third-party description.
Rank #2
- No wall warts: Work freely with its bus-powered USB-C. No wall outlet required.
- Big on space: High-capacity storage to store all your files in one place.
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- Fuss-free, clutter-free: One port, one cord, quick connect.
- Peace-of-mind: Comes with two-year limited warranty and Rescue Data Recovery Services.
Prepare the affected systems before testing
Contain the incident first: isolate affected devices from networks to limit spread, preserve the ransom note and relevant evidence, and ensure the ransomware process and persistence have been addressed before running a decryptor. CISA recommends evidence preservation and recovery on clean systems. The Solidbit manual advises making a full-disk backup, stopping the ransomware process, removing persistence and leaving adequate disk space; it also notes that running a decryptor does not replace forensic investigation.
Where feasible, test on a separate copy or image rather than the only copy of affected data. Keep encrypted originals intact. For organizations, coordinate containment, investigation and recovery with qualified responders; an attempt to decrypt files should not erase evidence needed to understand how the intrusion happened.
Rank #3
- Slim durable design to help take your important files with you
- Back up smarter with included device management software[2] with defense against ransomware
- Help secure your important files with password protection and hardware encryption
- 3-year limited warranty
Follow only the decryptor’s documented test procedure
If the manual provides a non-destructive test mode
Use that mode exactly as documented. Rhysida’s manual describes a test intended to verify whether decryption would work without changing files. That description applies to the Rhysida tool; it does not establish that other decryptors behave the same way.
If the manual requires an original-and-encrypted sample pair
Follow the tool’s sample-matching instructions precisely. The DoNex manual describes using a matching original and encrypted file to recover a key and recommends an original sample of at least 1 MB. Do not substitute unrelated files or apply this procedure to another decryptor unless its own manual directs you to do so.
Rank #4
- High-capacity external hard drive with up to 2TB of storage The ModusTech Facet portable external hard drive gives you dependable HDD storage in a slim 2.5-inch design. Multiple capacities available up to 2TB — back up photos, videos, music, documents, and game libraries with room to grow. A trusted external storage solution for everyday backup, media archives, and creative work.
- USB-C and USB 3.1 connectivity with included 2-in-1 cable The Facet ships with a USB-C to USB-C cable and tethered USB-A adapter, so this external hard drive connects to modern laptops, USB-C iPhones, tablets, and older USB-A computers without buying an extra cable. USB 3.1 Gen 1 (5Gbps) interface delivers real-world transfer speeds up to 100MB/s — fast enough to back up 50GB of files in about 8 minutes.
- Plug-and-play external hard drive for PC, Mac, and laptops Preformatted in exFAT and ready to use the moment you plug it in. The Facet works out of the box with Windows PCs, macOS Macs, MacBooks, Chromebooks, and laptops — no drivers, no software, no setup required. A true plug-and-play external hard drive built for everyday use across every major operating system.
- External hard drive for PS4, Xbox One, and Smart TV gaming The Facet is compatible with PlayStation 4, Xbox One, and Smart TVs with USB support. PS4 and Xbox One games run directly from the drive — plug it in, format through the console, and add to your storage. Also works with Smart TVs that support USB recording or external media playback.
- Slim, shock-resistant portable external hard drive — 160g At 2.5 inches and just 160g, this portable external hard drive is bus-powered through a single USB-C cable — no separate power adapter, no extra cables. Slim enough for a laptop bag, jacket pocket, or camera bag, with a shockresistant casing and faceted diamond-texture top panel that resists fingerprints and everyday wear. Backed by a 1-year limited warranty from ModusTech, a consumer electronics brand specializing in external storage.
If no test procedure is documented
Do not improvise with command-line switches, sample files or online advice. The absence of a documented test means you cannot assume the tool offers a non-destructive way to validate it. Pause and consult the official publisher or a qualified incident responder before proceeding.
Assess a successful test without overreading it
If the test succeeds, inspect representative recovered files and their contents before deciding whether to attempt broader recovery. A working sample does not prove that every file will decrypt. The Rhysida manual describes conditions involving the machine, file order, processor and file format that can affect decryption. The DoNex manual warns that recovery may be impossible or partial.
Best Value
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Use the manual’s stated limitations to judge what the result means. If representative files fail, are damaged, or do not match the expected results, stop rather than repeatedly running an uncertain tool over the only available data. Preserve the test results and seek help from the tool’s official publisher or an incident responder.
Consider backups and professional recovery before paying
Check whether clean, usable backups are available and whether they can be restored safely. CISA recommends offline, encrypted backups and testing them through a disaster-recovery scenario. A backup drive is useful preparation for future incidents and backup recovery; it does not verify decryptor software or restore files already encrypted.
CISA’s #StopRansomware Guide, revised October 19, 2023, advises consulting federal law enforcement about possible decryptors: researchers may have found flaws in some ransomware variants and released tools. CISA, the FBI and the NSA state that paying “does not guarantee that a victim’s files will be recovered.” Payment can also encourage further criminal activity. No test can make payment a certain route to recovery.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesRemoving active malware and decrypting files are separate tasks: cleaning a device does not restore encrypted data. If no backup is available, check whether an official free decryptor exists for the identified family, and consider a professional ransomware recovery assessment. For organizations, involve responders and law enforcement in recovery decisions.
Quick Recap
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