This article has been created in order to help explain what is the .CONTACTUS ransomware virus and how to remove it from your computer plus restore files, encrypted by it.
A new ransomware infection, believed to be an updated variant of .PAUSA ransomware has been reported by security researchers to encrypt the files on the computers infected by it and then leave behind the .CONTACTUS file suffix. The ransomware also drops a ransom note, called !!!RESTORE_FILES!!!.txt which aims get victims to pay a hefty ransom fee to the cyber-criminals in order to get their files restored back to their working state.
Threat Summary
| Name | .CONTACTUS Files Virus |
| Type | Ransomware, Cryptovirus |
| Short Description | Aims to encrypt the files on your PC and then leaves behind a ransom note, asking you to pay ransom to restore files. |
| Symptoms | Files are encrypted with the .CONTACUS file extension added to them. A ransom note is dropped, known as !!!RESTORE_FILES!!!.txt |
| Distribution Method | Spam Emails, Email Attachments, Executable files |
| Detection Tool |
See If Your System Has Been Affected by malware
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Malware Removal Tool
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User Experience | Join Our Forum to Discuss .CONTACTUS Files Virus. |
| Data Recovery Tool | Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive. |
.CONTACTUS Ransomware – Spread
The .CONTACUS ransomware could infect victims computers using different methods. One of those methods is via a payload dropper file which is basically an intermediary malware, that is obfuscated and aims to evade various antivirus programs and other protection software. These types of files are usually dropped as a result of the infection file being uploaded on web pages and posing as a fake setup of a program, a fake document and even a fake license activator, such as cracks, patches and even key generator programs. Usually the websites on which these files are uploaded are torrent sites or software providing sites with low reputation.
.CONTACTUS Ransomware Virus – More Information
.CONTACTUS is the type of ransomware which aims to encrypt the files on your computer and then ask for a payment to be made in order to get the files of the virus back to normal again. It has so far been detected in quite the different versions, such as:
All of the variants use a ransom note which does not differ much among them. In this variant, the ransom note detected in question is called !!!RESTORE_FILES!!!.txt and it has the following message to victims:
All your important files were encrypted on this PC.
All files with .CONTACTUS extension are encrypted.
Encryption was produced using unique private key RSA-1024 generated for this computer.
To decrypt your files, you need to obtain private key + decrypt software.
To retrieve the private key and decrypt software, you need to CONTACTUS us by email decryption@bitmessage.ch send us an email your !!!RESTORE_FILES!!!.txt file and wait for further instructions.
For you to be sure, that we can decrypt your files – you can send us a 1-3 any not very big encrypted files and we will send you back it in a original form FREE.
Price for decryption $600 if you contact us first 72 hours.
Your personal id:
[redacted 40 characters] E-mail address to contact us:
decryption@bitmessage.ch
Reserve e-mail address to contact us:
decryption@india.com
In addition to it’s ransom note, the virus also drops other files as a part of it’s payload, that may be located in the following Windows directories:
- %AppData%
- %Local%
- %LocalLow%
- %Roaming%
- %Temp%
Once these files are dropped on the victim’s computer, they may start to perform a set of unwanted activities, such as create mutexes, create copies of the virus, in case the original variants of the files are deleted on the victim PC. In addition to those activities, the .CONTACTUS files virus may also set a registry value string with data pointing out to it’s file that is responsible for the actual encryption process in the Run and RunOnce registry sub-keys in Windows. They are located as follows:
→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
Besides this, the .CONTACUS ransomware virus may have one more trick up it’s sleeve. The malware may use a script that execues the following commands in Windows command prompt in order to delete the shadow volume copies of the infected computer:
→ sc stop VVS
sc stop wscsvc
sc stop WinDefend
sc stop wuauserv
sc stop BITS
sc stop ERSvc
sc stop WerSvc
cmd.exe /C bcdedit /set {default} recoveryenabled No
cmd.exe /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\System32\cmd.exe” /C vssadmin.exe Delete Shadows /All /Quiet
.CONTACTUS Files Virus – Encryption Process
In order for it to encrypt the files on the infected computers, the .CONTACTUS ransomware infection may initiate a system scam that checks your computer for often used file types, such as the following:
→ “PNG .PSD .PSPIMAGE .TGA .THM .TIF .TIFF .YUV .AI .EPS .PS .SVG .INDD .PCT .PDF .XLR .XLS .XLSX .ACCDB .DB .DBF .MDB .PDB .SQL .APK .APP .BAT .CGI .COM .EXE .GADGET .JAR .PIF .WSF .DEM .GAM .NES .ROM .SAV CAD Files .DWG .DXF GIS Files .GPX .KML .KMZ .ASP .ASPX .CER .CFM .CSR .CSS .HTM .HTML .JS .JSP .PHP .RSS .XHTML. DOC .DOCX .LOG .MSG .ODT .PAGES .RTF .TEX .TXT .WPD .WPS .CSV .DAT .GED .KEY .KEYCHAIN .PPS .PPT .PPTX ..INI .PRF Encoded Files .HQX .MIM .UUE .7Z .CBR .DEB .GZ .PKG .RAR .RPM .SITX .TAR.GZ .ZIP .ZIPX .BIN .CUE .DMG .ISO .MDF .TOAST .VCD SDF .TAR .TAX2014 .TAX2015 .VCF .XML Audio Files .AIF .IFF .M3U .M4A .MID .MP3 .MPA .WAV .WMA Video Files .3G2 .3GP .ASF .AVI .FLV .M4V .MOV .MP4 .MPG .RM .SRT .SWF .VOB .WMV 3D .3DM .3DS .MAX .OBJ R.BMP .DDS .GIF .JPG ..CRX .PLUGIN .FNT .FON .OTF .TTF .CAB .CPL .CUR .DESKTHEMEPACK .DLL .DMP .DRV .ICNS .ICO .LNK .SYS .CFG”
After this is done, the .CONTACUS ransomware may begin to alter data on the files, by using a combination of two main encryption algorithms:
- AES (Advanced Encryption Standard), which generates an assymetric decryption key.
- RSA (Rivest-Shamir-Adleman), that begins to create a unique decryption key for each file.
The files, encrypted by the .CONTACTUS files virus may appear like the following:
The two algorithms make it virtually impossible to break the encryption, because of the sheer randomness used by the encryption module of the ransomware. And even though it is difficult to decrypt files directly, because for this to happen, researchers do need to crack the ransomware’s code, security analysts strongly advise not to pay any ransom to the crooks. This is because of two main reasons – you cannot trust them to recover your files and paying only supports their criminal activity.
Remove .CONTACUS Ransomware and Restore Encrypted Files
In order to make sure that this ransomware virus is gone from your computer, it is strongly reccomended that you follow the removal instructions underneath this article. They have been created to help you delete the malicious objects of this virus either manually, by using the information in this article or automatically, if you want a fast and safe solution. For maxmimum effecitiveness, security researchers strongly advise to automatically remove the encrypted files of this ransomware infection, by using an advanced anti-malware software. It will automatically remove all of the malware-related files from your computer while in the same time ensuring that your PC remains protected against future threats as well.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Step 1: Scan for .CONTACTUS Files Virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall .CONTACTUS Files Virus and related malware from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by .CONTACTUS Files Virus on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by .CONTACTUS Files Virus there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Boot Your PC In Safe Mode to isolate and remove .CONTACTUS Files Virus
Step 5: Try to Restore Files Encrypted by .CONTACTUS Files Virus.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and .CONTACTUS Files Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
.CONTACTUS Files Virus-FAQ
What is .CONTACTUS Files Virus Ransomware?
.CONTACTUS Files Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does .CONTACTUS Files Virus Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does .CONTACTUS Files Virus Infect?
Via several ways..CONTACTUS Files Virus Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of .CONTACTUS Files Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open ..CONTACTUS Files Virus files?
You can't without a decryptor. At this point, the ..CONTACTUS Files Virus files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your ..CONTACTUS Files Virus files successfully, then do not despair, because this virus is still new.
Can I Restore "..CONTACTUS Files Virus" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..CONTACTUS Files Virus files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of .CONTACTUS Files Virus Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate .CONTACTUS Files Virus ransomware and then remove it without causing any additional harm to your important ..CONTACTUS Files Virus files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can .CONTACTUS Files Virus Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the .CONTACTUS Files Virus Research
The content we publish on SensorsTechForum.com, this .CONTACTUS Files Virus how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the .CONTACTUS Files Virus ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
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