Decrypt .cerber2 files. New ransomware removal, and prevention

As Cerber ransomware introduced a new extension, the IT observers reported a fresh version of the infection. They labeled the discovery according to the sequence appended to the files affected. So we learnt about the Cerber2 ransomware.

Not only had the extension itself undergone changes; herewith you will learn about quite a few tweaks which make the release a fairly stand-alone piece of crypto-trojan.
First off, let’s outline the things that any victims would see.

The ransomware may exploit a third party installer. For instance, it may come under the guise of a game for kids. Once the installation completes, the users would notice the desktop wallpaper has changed. Now it looks like a gloomy black screen with particles that remind a snow. On that background, green poisonous letters compose a ransom note. As usual, the notification is a preliminary. It prompts to proceed with one of the links in the TOR browser. That would land one on the page with final instructions. They basically want you to transfer a single bitcoin to the hacker’s wallet. A bitcoin rate of exchange is far from being stable. Currently, it is floating between USD 550 and 600.
Now we are going to consider more techie things. Those are rather invisible for your unaided eye.

Cerber2 Encryption Message

Cerber2 “decryption instructions”

The trojan aggravates its detection and examination by using a special packer. It also abandoned the 16-bit encryption key and introduced the 32-bit scrambling. That is not so hard to comprehend as it may seem. The number of bits shows the size of data units that are subject to decryption individually. To aggravate decryption, the virus splits data into units of equal size. In the case of original Cerber, a unit size is 16 bit (which matches the key size). The Cerber2 sticks to a 32 bit unit, which disables the survival option with free descriptor available for the 16-bit version.

Files encrypted by Cerber2

Files encrypted by Cerber2

Remarkably, the salvation came for the victims hit by the second version, too. IT security released a free decryptor. Alas and alack, the ransomware makers promptly fixed the vulnerability leveraged by the free decryption kit. Now, the prevention is the best and the only ultimate cure.

cerber2 decryptor

Cerber2 payment info + “timer”

Without prejudice to the above, removal of Cerber2 is a must, once the infecting occurred. In the unfortunate case of the ransomware landing on your machine, also kindly make use of the recovery options below. Most of the users concerned do not pay the ransom claimed by the crooks. Hopefully, the methods below would enable a satisfactory recovery of the data encrypted by Cerber2 ransomware.

Automated cleanup to remove Cerber2 file extension trojan

Infection vector for ransomware typically features a trojan. The one in question definitely subscribes to that routine. The trojan drops its body into target computer and proceeds with disabling the detecting functionality of any security solution installed. The antivirus is thus unable to spot introduction of virus from the remote server.
The ransomware invasion is indicative of its dropper residing in the computer memory. It also hints at other invasions. The PC can hardly be considered properly protected due to the impacts of the above trojan.
Ultimate option implies a total formatting for any drives of your PC. That is not an option for many users, for it destroys all the data hosted by the machine. The best solution to pick would be in-depth system examination with a reliable security suite.
The trojan that has installed Cerber2 ransomware (Decrypt my files#.html), unless removed, is to trigger its installation campaign as soon as a new strain of ransomware is available. Thereby, it is critical to kill it as soon as possible.

The technique successfully overcomes malicious software, including any ransoming threats. It deploys a reputable security suite that offers not a single chance for malicious components to avoid detection and extermination. The software is incredibly user-friendly and operates on a single-click basic.

It is good to note the removal of Cerber2 ransomware does not recover the data affected. However, the virus is subject to compulsory extermination or else is going to introduce related infections into the machine.

1. Click the button to download the stub installer and go through several setup dialogs. Once the tool is up and running, click Start Computer Scan

2. Wail until the cleaner checks the PC for .cerber2 ransomware files malicious code. As soon as the scan is completed, the report will list all malware objects spotted in the system. Make sure the entries for detected infections are checked, and select the Fix Threats feature. This will result in malware removal and system remediation, so you should now be good to go.

Restore the encrypted files

.Cerber2 encryption is a sophisticated data modification. There is no simple and single solution to cover all the cases. Transferring the ransom as demanded by the crooks is not the way either.Kindly apply the methods outlined below as they have been carefully developed to provide a recovery help for the most severe cases of encrypting assaults.

Data recovery with automatic software

Good news is that the virus actually deals with copies of the files. The originals have been deleted. The removed data still can be restored by virtue of such tools as  Data Recovery Pro.

Shadow Volume Copies

As Windows creates backups at given periods of time, a victim is advised to address relevant restore points. Unfortunately, the method cannot apply unless the System Restore had been enabled prior to the invasion. Please also note the recovery returns files as saved before the time associated with the restore point addressed.

  • Previous Versions dialog to target individual files
    One can open Properties for any file. The menu has a tab called Previous Versions. It indicates versions of a file that have been backed up.
    To make use of the feature, right-click an affected file and choose Properties in the drop-down list. Proceed with clicking the above-mentioned tab. You can opt between the Copy or Restore procedures, the former enabling to copy the item into the location specified by the user.

test properties

shadow explorer

Backups and removing remaining traces of the .cerber2 ransomware

Prevention is the best cure. If you stick to making regular reserve copies of your data and store those outside your operating system, the impacts by the ransomware are very limited. However, prior to copying the data from backups into the system hit by .cerber2 ransomware, make sure the removal of Cerber2 virus has completed.

Your manual removal attempts may kill the ransomware in general. In most of the cases, some remnants manage to survive and are still capable of causing a significant damage. Please apply a reliable anti-malware scanner to detect and remove, if applicable, any remaining infections.


  1. hasan

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