The Doctorhelp virus falls under the ransomware type of infection. A harmful program of such sort encrypts all userâs data on the computer (photos, text files, excel sheets, music, videos, etc) and adds its specific extension to every file, leaving the How_to_back_files.html text files in every folder containing encrypted files.
What is known about the Doctorhelp virus?
Doctorhelp adds its specific .doctorhelp extension to the title of every encrypted file. For instance, an image named âphoto.jpgâ will be changed to âphoto.jpg.doctorhelpâ. In the same manner, the Excel table with the name âtable.xlsxâ will be changed to âtable.xlsx.doctorhelpâ, and so forth.
In each directory containing the encrypted files, a How_to_back_files.html text file will be created. It is a ransom money note. It contains information on the ways of contacting the racketeers and some other remarks. The ransom note most probably contains instructions on how to purchase the decryption tool from the tamperers. You can get this tool after contacting [email protected] by email. That is basically the scheme of the malefaction.
Doctorhelp Overview:
| Name | Doctorhelp Virus |
| Extension | .doctorhelp |
| Ransomware note | How_to_back_files.html |
| Contact | [email protected] |
| Detection | Win32/Filecoder.Avaddon.H, TrojanDropper:Win32/BcryptInject.A!MTB, BScope.TrojanRansom.Reveton |
| Symptoms | Your files (photos, videos, documents) have a .doctorhelp extension and you canât open them. |
| Fix Tool | See If Your System Has Been Affected by Doctorhelp virus |
The How_to_back_files.html file accompanying the Doctorhelp malware provides the following discouraging information:
YOUR PERSONAL ID: - /!\\ YOUR COMPANY NETWORK HAS BEEN PENETRATED /!\\ All your important files have been encrypted! Your files are safe! Only modified. (RSA+AES) ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE WILL PERMANENTLY CORRUPT IT. DO NOT MODIFY ENCRYPTED FILES. DO NOT RENAME ENCRYPTED FILES. No software available on internet can help you. We are the only ones able to solve your problem. We gathered highly confidential/personal data. These data are currently stored on a private server. This server will be immediately destroyed after your payment. If you decide to not pay, we will release your data to public or re-seller. So you can expect your data to be publicly available in the near future.. We only seek money and our goal is not to damage your reputation or prevent your business from running. You will can send us 2-3 non-important files and we will decrypt it for free to prove we are able to give your files back. Contact us for price and get decryption software. email: [email protected] [email protected] * To contact us, create a new free email account on the site: protonmail.com IF YOU DON\'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER. * Tor-chat to always be in touch:
In the image below, you can see what a folder with files encrypted by the Doctorhelp looks like. Each filename has the â.doctorhelpâ extension appended to it.
How did my machine catch Doctorhelp ransomware?
There are many possible ways of ransomware injection.
Nowadays, there are three most popular ways for criminals to have ransomware settled in your digital environment. These are email spam, Trojan injection and peer-to-peer file transfer.
- Another thing the hackers might try is a Trojan horse scheme. A Trojan is a program that gets into your machine disguised as something legal. For instance, you download an installer of some program you need or an update for some software. However, what is unboxed reveals itself a harmful agent that encodes your data. As the update file can have any name and any icon, youâd better be sure that you can trust the source of the things youâre downloading. The optimal way is to trust the software companiesâ official websites.
- As for the peer-to-peer networks like BitTorrent or eMule, the threat is that they are even more trust-based than the rest of the Internet. You can never know what you download until you get it. So youâd better be using trustworthy resources. Also, it is reasonable to scan the folder containing the downloaded files with the anti-malware utility as soon as the downloading is finished.
How to remove ransomware?
It is crucial to note that besides encrypting your files, the Doctorhelp virus will probably install Vidar Stealer on your PC to seize your credentials to various accounts (including cryptocurrency wallets). That program can derive your logins and passwords from your browserâs auto-filling data.
How Ńan I avoid ransomware infiltration?
Doctorhelp ransomware doesnât have a endless power, so as any similar malware.
You can armour your system from ransomware attack in three easy steps:
- Never open any emails from unknown mailboxes with unknown addresses, or with content that has likely no connection to something you are waiting for (can you win in a money prize draw without even taking part in it?). If the email subject is more or less something you are waiting for, check all elements of the dubious letter carefully. A fake letter will surely contain mistakes.
- Never use cracked or unknown programs. Trojan viruses are often shared as an element of cracked products, most likely as a âpatchâ which prevents the license check. But untrusted programs are difficult to tell from trustworthy ones, because trojans may also have the functionality you need. Try searching for information about this software product on the anti-malware forums, but the best way is not to use such programs at all.
FAQ
đ€ How can I open â.doctorhelpâ files?Is it possible to openâ.doctorhelpâ files?
Thereâs no way to do it, unless the files â.doctorhelpâ files are decrypted.
đ€ The encrypted files are very important to me. How can I decrypt them quickly?
Itâs good if you have fаr-sightedly saved copies of these important files elsewhere. Otherwise, you might try to employ System Restore. The only question is whether you have saved any Restore Points that would be helpful now. There are other ways to beat ransomware, but they take time.
đ€ What to do if the Doctorhelp virus has blocked my computer and I canât get the activation code.
đ€ What could help the situation right now?
Some of the blocked files can be found elsewhere.
- If you sent or received your important files through email, you could still download them from your online mail server.
- You may have shared images or videos with your friends or family members. Simply ask them to give those images back to you.
- If you have initially got any of your files from the Internet, you can try downloading them again.
- Your messengers, social media pages, and cloud disks might have all those files too.
- It might be that you still have the needed files on your old PC, a laptop, cellphone, memory stick, etc.
USEFUL TIP: You can employ file recovery utilities1 to get your lost data back since ransomware encrypts the copies of your files, deleting the authentic ones. In the tutorial below, you can see how to use PhotoRec for such a restoration, but remember: you wonât be able to do it before you eradicate the ransomware itself with an antivirus program.
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Brendan SmithReferences
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