The 1btc virus was originally discovered by virus analyst Tomas Meskauskas, and belongs to the MedusaLocker ransomware or DHARMA family. This ransomware encrypts all user’s data on the PC (photos, documents, excel tables, music, videos, etc), adds its specific extension to every file, and creates the !!!HOW_TO_DECRYPT!!!.mht files in every folder which contains encrypted files.
1btc Virus
☝️ 1btc can be identify as a MedusaLocker ransomware infection.
1btc adds its specific “.1btc” extension to the name of every file. For example, your photo named as “my_photo.jpeg” will be transformed into “my_photo.jpeg.1btc“, report in Excel tables named “report.xlsx” – to “report.xlsx.1btc“, and so on.
!!!HOW_TO_DECRYPT!!!.mht file, which can be found in every folder that contains the encrypted files, is a ransom money note. Inside of it, you can find information about ways of contacting 1btc ransomware developers, and some other info. Inside of the ransom note, there is usually an instruction saying about purchasing the decryption tool. This decryption tool is created by ransomware developers, and can be obtained through the email, contacting cmd@jitjat.org, dirhelp@keemail.me.
Here is a summary for the 1btc (medusalocker):
| Name | 1btc (medusalocker) Virus |
| Ransomware family1 | MedusaLocker ransomware |
| Extension | .1btc |
| Ransomware note | !!!HOW_TO_DECRYPT!!!.mht |
| Contact | cmd@jitjat.org, dirhelp@keemail.me |
| Detection | Ransom:Win32/DoejoCrypt.A, Ransom:Win32/DoejoCrypt.A – [DoejoCrypt Virus Removal Instruction], Win32/Bifrose.ADR |
| Symptoms | Your files (photos, videos, documents) have a .1btc extension and you can’t open it. |
| Fix Tool | See If Your System Has Been Affected by 1btc (MedusaLocker) virus |
The !!!HOW_TO_DECRYPT!!!.mht file by the 1btc (MedusaLocker) ransomware states the following frustrating information:
All your valiable data has been encrypted! Hello! Sorry, but we have inform you that your order has been blocked due to the issue of securities. Make sure your data is not blocked. All your valuable files were encrypted with strong encryption algorithms AES-256 + RSA-2048 + CHACHA and renamed. You can read about these algorithms in Google. Your unique encryption key is stored securely on our server and your data can be decrypted quickly and securely. We can prove that we can decrypt all of your data. Please just send us 3 small encrypted files which are randomly stored on your server. We will decrypt these files and send them to you as a proof. Please note that files for free test decryption should not contain valuable information. As you know information is the most valuable resource in the world. That's why all of your confidential data was uploaded to our servers. If you need proof, just write us and we will show you that we have your files. If you will not start a dialogue with us in 72 hours we will be forced to publish your files in the Darknet. Your customers and partners will be informed about the data leak by email or phone. This way, your reputation will be ruined. If you will not react, we will be forced to sell the most important information such as databases to interested parties to generate some profit. Please understand that we are just doing our job. We don't want to harm your company. Think of this incident as an opportunity to improve your security. We are opened for dialogue and ready to help you. We are professionals, please don't try to fool us. If you want to resolve this situation, please write to ALL of these 2 email addresses: cmd@jitjat.org dirhelp@keemail.me In subject line please write your ID: - Important! * We asking to send your message to ALL of our 2 email adresses because for various reasons, your email may not be delivered. * Our message may be recognized as spam, so be sure to check the spam folder. * If we do not respond to you within 24 hours, write to us from another email address. Use Gmail, Yahoo, Hotmail, or any other well-known email service. Important * Please don't waste the time, it will result only additinal damage to your company! * Please do not try to decrypt the files yourself. We will not be able to help you if files will be modified.
The image below gives a clear vision of how the files with “.1btc” extension look like:
Example of encrypted .1btc files
How did I get MedusaLocker ransomware on my computer?
That was a huge number of different ways of ransomware injection.
However, nowadays there are only two ways of 1btc (MedusaLocker) injection – email spam and trojans. You may see a lot of messages on your email, stating that you need to pay different bills or to get your parcel from the local FedEx department. But all such messages are sent from unknown email addresses, not from familiar official emails of these companies. All such letters contain the attached file, which is used as a ransomware carrier. If you open this file – your system will get infected by MedusaLocker.
In case of trojans presence, you will be offered to download and install ransomware on your PC under the guise of something legit, like a Chrome update, or update for the software you are storing on your computer. Sometimes, trojan viruses can be masked as legit programs, and ransomware will be offered for download as an important update, or a big pack of extensions which are essential for proper program functioning.
There is also the third way of ransomware injection, however, it becomes less and less popular day-to-day. I am talking about peering networks, such as torrents or eMule. No one can control which files are packed in the seeding, so you can discover a huge pack of different malware after downloading. If circumstances force you to download something from peering networks – scan every downloaded folder or archive with antivirus software.
How to remove MedusaLocker?
In addition to encode a victim’s files, the 1btc infection has also started to install the Azorult Spyware on PC to steal account credentials, cryptocurrency wallets, desktop files, and more.
To ensure the user that ransomware distributors really have the decryption tool, they may offer to decrypt several encrypted files. And they are the single owners of this decryption program: 1btc (MedusaLocker) ransomware is a completely new type, so there is no legit program from anti-malware vendors, which can decrypt your files. But such a situation is in momentum: decryption tools are updating every month.
However, paying the ransom is a bad decision, too. There is no guarantee that 1btc (MedusaLocker) ransomware developers will send you the decryption tool and a proper decryption key. And there are a lot of cases when ransomware distributors deceived their victims, sending the wrong key or even nothing. In the majority of cases, there is a way to recover your files for free. Search for available backups, and restore your system using it. Of course, there is a chance that the backup you found is too old, and does not contain a lot of files you need. But, at least you will be sure that there is no malware in your system. However, to ensure that there are no malicious programs in your system after the backup, you need to scan your PC with anti-malware software.
MedusaLocker ransomware is not unique. There are more ransomware of this type: Biden, Win32, Tirp. These examples of ransomware act in a similar way: encrypting your files, adding a specific extension, and leaving a great number of ransom money notes in every folder. But there are two things that make difference between these ransomware – cryptography algorithm, which is used for file encryption, and ransom amount. In some cases, victims are able to decrypt their files without any payments, just using free solutions produced by several anti-malware vendors, or even with the decryption tool which is offered by ransomware creators. The last scenario is possible when ransomware distributors have typed your decryption key inside of a ransom money note. However, as you can already guess, such luck is a very rare thing. Ransomware is created for money gaining, not for jokes or scaring.
Reasons why I would recommend GridinSoft2
The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes3.
Download Removal Tool.
You can download GridinSoft Anti-Malware by clicking the button below:
Run the setup file.
When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your PC.
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
Press “Install” button.
Once installed, Anti-Malware will automatically run.
Wait for the Anti-Malware scan to complete.
GridinSoft Anti-Malware will automatically start scanning your computer for MedusaLocker infections and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.
Click on “Clean Now”.
When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
Frequently Asked Questions
No way. These files are encrypted by 1btc MedusaLocker ransomware. The contents of .1btc files are not available until they are decrypted.
If your data remained in the .1btc files are very valuable, then most likely you made a backup copy.
If not, then you can try to restore them through the system function – Restore Point. All other methods will require patience.
Of course not. Your encrypted files do not pose a threat to the computer. What happened has already happened.
You need GridinSoft Anti-Malware to remove active system infections. The virus that encrypted your files is most likely still active and periodically runs a test for the ability to encrypt even more files. Also, these viruses install keyloggers and backdoors for further malicious actions (for example, theft of passwords, credit cards) often.
In this situation, you need to prepare the memory stick with a pre-installed Trojan Killer.
You can try to find a copy of an original file that was encrypted:
- Files you downloaded from the Internet that were encrypted and you can download again to get the original.
- Pictures that you shared with family and friends that they can just send back to you.
- Photos that you uploaded on social media or cloud services like Carbonite, OneDrive, iDrive, Google Drive, etc)
- Attachments in emails you sent or received and saved.
- Files on an older computer, flash drive, external drive, camera memory card, or iPhone where you transferred data to the infected computer.
Also, you can contact the following government fraud and scam sites to report this attack:
- In the United States: On Guard Online;
- In Canada: Canadian Anti-Fraud Centre;
- In the United Kingdom: Action Fraud;
- In Australia: SCAMwatch;
- In New Zealand: Consumer Affairs Scams;
- In France: Agence nationale de la sécurité des systèmes d’information;
- In Germany: Bundesamt für Sicherheit in der Informationstechnik;
- In Ireland: An Garda Síochána;
To report the attack, you can contact local executive boards. For instance, if you live in USA, you can have a talk with FBI Local field office, IC3 or Secret Service.
How сan I avoid ransomware attack?
MedusaLocker ransomware doesn’t have a superpower.
You can easily protect yourself from its injection in several easy steps :
- Ignore all emails from unknown mailboxes with a strange unknown address, or with content that has likely no connection to something you are waiting for (can you win in a lottery without taking part in it?). If the email subject is likely something you are waiting for, check carefully all elements of the suspicious letter. A fake email will surely contain a mistake.
- Do not use cracked or untrusted programs. Trojans are often distributed as a part of cracked software, possibly under the guise of “patch” which prevents the license check. But untrusted programs are very hard to distinguish from trustworthy software, because trojans may also have the functionality you need. You can try to find information about this program on the anti-malware forums, but the best solution is not to use such programs.
- And to be sure about the safety of the files you downloaded, use GridinSoft Anti-Malware. This program will surely be a perfect shield for your personal computer.
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Brendan SmithHow to Remove 1BTC (MEDUSALOCKER) Ransomware & Recover PC
Name: 1BTC (MEDUSALOCKER) Virus
Description: 1BTC (MEDUSALOCKER) Virus is a ransomware-type infections. This virus encrypts important personal files (video, photos, documents). The encrypted files can be tracked by a specific .1btc extension. So, you can't use them at all.
Operating System: Windows
Application Category: Virus
User Review
( votes)References
- My files are encrypted by ransomware, what should I do now?
- GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
- More information about GridinSoft products: https://gridinsoft.com/comparison
