Ransomware is quickly becoming a major threat in the cyber space since it’s easy to use, hard to track and decrypt and the ROI is high. As a result, it’s evolving and improving with horrific speed.
Cry ransomware, for example, also known as Central Security Treatment Organization and CSTO uses the User Datagram Protocol (UDP) to communicate and Imgur and Google Maps to spread itself. Although it’s a rather simple encryption Trojan, and not sophisticated like Zepto or Cerber3, Cry ransomware should not be underrated as no decryption for it has yet been found, and experts say it has affected 8,000 users in just 2 weeks.
Threat Summary
Name | Cry (CSTO) Ransomware |
Type | Ransomware |
Short Description | Encrypts the user’s files with a strong encryption algorithm and requests to contact e-mail address to make a ransom payoff of approximately 2000 dolalrs in BitCoin. |
Symptoms | Files are encrypted and become inaccessible and a .cry file extension is being added to them. A ransom note is left as a text file on the desktop. |
Distribution Method | Spam Emails, Email Attachments, File Sharing Networks. |
Detection Tool |
See If Your System Has Been Affected by malware
Download
Malware Removal Tool
|
User Experience | Join our forum to Discuss Bart Ransomware. |
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. |
Cry (CSTO) Ransomware Virus Uses UDP, Imgur and Google Maps to Collect and Communicate Victims’ Data
The User Datagram Protocol, or UDP, is the perfect protocol for network applications such as gaming, voice and video communications due to its low perceived latency and good quality. UDP is also used for applications requiring lossless data transmission.
The creators of Cry (CSTO) ransomware have chosen to use the UDP protocol in order to hide the location of the command and control server (C&C server). Once Cry infects a computer, it will gather information on the host such as the Windows and OS version, username, CPU type, installed service pack, etc. Then it will “communicate” that information via the UDP to 4096 different IP addresses, among which will be the hidden C&C server.
On another side, Cry uses Google Maps API to determine the victim’s location via Server Set Identifiers (SSIDs) of wireless networks in the given area. Experts have not yet, however, discovered why the Cry developers would need the victims’ locations.
BleepingComputer.com reported that Cry ransomware would also use websites such as Imgur.com and Pastee.org to host the collected information about the victims. Cry would then encrypt the collected information and compile it in a fake PNG file, and would send it to a photo gallery on Imgur.com. In return, Imgur would rename the PNG file and “communicate” the new name via the UDP protocol to the C&C server.
According to researchers at Invincea, Cerber ransomware has also used similar technique with the UDP protocol in order to hide the C&C server location.
Cry (CSTO) Ransomware Virus In Detail
Cry ransomware also uses the name of a fake security organization – Central Security Treatment Organization – probably in order to appear legitimate to the users and thus to be more convincing as to why they need to pay the demanded ransom fee, which is 1.1 bitcoin, or $625. The Department of Pre-Trial Settlement or the Federal Agency of Investigation are also non-existent.
Once Cry ransomware is inside the computer, it will encrypt the victims’ sensitive data consisting of the following file types: BAT, TXT, LOG, DAT, MP3, JPG, WMV, BMP, XML, HTML, CSS and JS. The encrypted files will receive the .cry extension, hence the name of the ransomware. It will then delete the Shadow Volume Copies to prevent victims from restoring their files without paying the ransom.
Cry will then drop the ransom notes named “Recovery_[random_chars].html” and “!Recovery_[random_chars].txtencrypts” on the victim’s desktop with instructions.
The ransom note reads like this:
‘WARNING!
DOCUMENTS, DATABASES, PROJECT FILES, AUDIO AND VIDEO CONTENT AND OTHER CRITICAL FILES
HAVE BEEN ENCRYPTED WITH A PERSISTENT MILITARY-GRADE CRYPTO ALGORITHM
How did this happen?
Specially for your PC was generated personal 4096 bit RSA key, both public and private.
All your files have been encrypted with the public key.
Decrypting of your files is only possible with the help of the private key and de-crypt program.
What do I do?
If you HAVE REALLY VALUABLE DATA, you better NOT WASTE YOUR TIME, because there is NO OTHER WAY to get your files, EXCEPT MAKE A PAYMENT’
The victims are instructed on where they should click to pay the ransom fee.
Cry (CSTO) Ransomware Virus Removal
As mentioned earlier, Cry is quickly spreading around as it reached 8,000 infected users in just 2 weeks. Decryptors have not yet been developed and if your system has been attacked by Cry, we urge you to not pay the demanded amount. Cyber criminals may never send you a decryption key, and even if they do, Cry will remain in your system and may strike again.
It’s best to remove the virus from your system as soon as possible. Only then you could wait for a decryptor to be released or try to use a file recovery program to restore some of your data if possible.
Below you’ll find instructions on how to manually remove Cry, or what program to use to automatically remove the virus for you.
- Step 1
- Step 2
- Step 3
- Step 4
- Step 5
Step 1: Scan for Cry (CSTO) Ransomware with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall Cry (CSTO) Ransomware 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:
Step 3: Clean any registries, created by Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware there. This can happen by following the steps underneath:
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 Cry (CSTO) Ransomware
Step 5: Try to Restore Files Encrypted by Cry (CSTO) Ransomware.
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 Cry (CSTO) Ransomware 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.
Cry (CSTO) Ransomware-FAQ
What is Cry (CSTO) Ransomware Ransomware?
Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware Infect?
Via several ways.Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware 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 .Cry (CSTO) Ransomware files?
You can't without a decryptor. At this point, the .Cry (CSTO) Ransomware 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 .Cry (CSTO) Ransomware files successfully, then do not despair, because this virus is still new.
Can I Restore ".Cry (CSTO) Ransomware" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware ransomware and then remove it without causing any additional harm to your important .Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware Research
The content we publish on SensorsTechForum.com, this Cry (CSTO) Ransomware 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 Cry (CSTO) Ransomware 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.
- Verify Facebook, LinkedIn and Twitter personal profiles.