How to remove x1881 virus and restore encrypted files

x1881 ransomware virus

x1881 is a new version of Cryptomix ransomware. The corrupted files acquire .x1881 extension, and asks for 1 Bitcoin (around 3900$) for data recovery. CryptoMix is the unwanted software getting into PC's mainly via e-mail spam and Trojans. Occasionally web-criminals use zero-day vulnerabilities to get into the PC, but they are promptly corrected. When infection is done, x1881 inspects the computer memory, determines the quantity of folders to be encrypted and their rough price. Currently, any modern virus can cypher image, audio, video and text files in all known formats. x1881 encrypts all folders, but the ones that look like business documents go first. All programs in the system will be untouched since hackers are interested only in information. The operation is carried out via well-known AES and RSA algorithms, and it is so complicated that that decryption of data without a key is impossible. Such complexity gives base for unbelievable effectuality of this kind of viruses in recent years: common PC operator, even having a very high knowledge of the PC, won't ever be able to recover the files, and will be forced to pay the price. The single method to restore the information is to hack the scam website and get the master key. Sometimes it is possible to retrieve these keys via flaws in viruse's program code.

That article is dedicated to x1881 virus that gets onto users' computers around the world, and corrupts the data. Here we've gathered important information about x1881's essence, and how to uninstall x1881 from the workstation. Except that, we'll explain how to get back the cyphered information, if possible.

The knowledge of computers is quite important in our century, because it assists you to protect the system from malicious programs. Unfortunately, 90% of customers see the significance of computer knowledge just after ransomware infection. To guard yourself, you should remember these few basic rules:

    • Be careful with the e-mails which contain something more than a message. If you don't know who send the letter and it tells about receiving any prize, a lost package or something like that, this might be a fraud letter. The #2 efficient type of these letters is a forgery for business correspondence. It is normal to be interested and read the letter even if it is obviously not for you, but don't forget that one click on the viral file might cost you lots of headache, money and time.
    • Do not disregard the red flags that your PC shows. Data encrypting is a complicated process that requires a lot of hardware resources. If you detect a significant decrease in system power or see a weird string in the Process Manager, you should switch off the machine, load it in safe mode, and run the AV-tool. Of course, the certain amount of information will be lost, but the other part of them will be safe.
    • Don't admit any changes to your PC, originating from suspicious programs. One of the most efficient manners of file recovery is the restoration through Shadow Copies, so scammers have included the elimination of SC in the default functionality of ransomware. The removal of shadow copies needs admin rights and user's verification. The second of thinking before verifying the dialogue box can save your data and your time.

We draw your attention to the fact that deleting the virus is only the, first step, which is compulsory for the standard work of the PC. If you remove virus, you will not recover the data instantly, it will demand multiple actions described in the next part. In case of encrypting virus we do not publish the manual deletion instruction, since its complication and the probability of failing will be very high for average user. We don't recommend anyone to eliminate ransomware manually, because it has different defensive mechanics which will interfere you. The very common ransomware protection technique is the uninstalling of information on the chance of file restoration or malware deletion attempt. To avoid this, abide to the tips under this paragraph.

Removal instruction

Step 1. Boot into Safe mode

Safe mode

Start -> Msconfig.exe

Safe mode. Step 1

On the tab Boot select Safe boot

Safe mode. Step 2

Step 2. Check Startup folder

Start -> Msconfig.exe ->Disable unknown programs in the Startup tab


Step 3. Check hosts file

Modify hosts file, that located in C:\Windows\System32\drivers\etc\ .

Hosts file.Step 1

Open the file with Notepad and delete suspicious strings.

Hosts file.Step 2

It has to look like this:

Hosts file.Step 3

Step 4. Scan the system with antiviral scanner


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Step 5. Disable Safe mode

Start -> Msconfig.exe ->Disable Safe boot in the Boot tab

Deactivate Safe mode

After eliminating the malware from the workstation, you just need to decrypt the polluted data. In fact, this is not about decryption, since the encrypting methods used by swindlers are extremely complex. Usually, to recover the files, you should ask for assistance on anti-malware communities or from celebrated malware researchers and AV software manufacturers. If you choose the independent file recovery - read our entry, which describes all the most effective manners.

To restore information, follow the article about files decryption.

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