Guid – Ransomware
Guid is a destructive software functioning as common ransomware. Michael Gillespie, the popular virus researcher, first discovered this new name in the DJVU ransomware family.
Guid was created for the sole function to encrypt all popular file types. Realistically, as soon as the file encryption is successfully accomplished, the users are not able to get access to them. Guid virus adds its own “.guid” to all the encrypted files. For example, the file “price_list.xls”, once crypted by Guid, will be entitled as “price_list.xls.guid”. As soon as the file encryption is accomplished, Guid puts its own special text document (_readme.txt) into all the folders that keep the encrypted files.
The alert mentioned by document asking for the random os very comparable to the alerts provided by other ransomware dangers coming from the DJVU family. The warning basically shows that the information has been secured and the only solution to get access to it is to use a special standalone key. Regretfully, this statement is absolutely real.
The approach to encrypt the files used by Guid is not entirely researched. However, there is no doubt that each computer owner might be issued a special decryption key, which is definitely distinct. It is very tough to recuperate the data without the proper key in place.
“Don’t worry, you can return all your files!”, from _readme.txt message:
One more peculiarity of the Guid infection is that the users are not able to get access to the key. The decrypting key is hosted on an unique server under the complete control by the criminals who have released the Guid virus into the internet. In order to obtain the key and restore the crucial data, the users are informed to contact the frauds via email or by telegram and to pay the ransom in the amount of $980.
The message likewise states that individuals need to call the Guid authors within 72 hours upon the minute of the information encryption. The alert shows that by doing so individuals will obtain a 50% discount, for that reason, the ransom amount drops down to $490.
Guid modified your files, nevertheless, it might not be the only danger on your PC. Plus, the ransomware might be concealed deep in the system. To spot and erase the risk completely, we suggest you to describe the aid of GridinSoft Anti-Malware app.
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No matter what the amount of the ransom is, we highly recommend that you do not pay the ransom. There is no guarantee that these online crooks will keep their guarantees, so they might not care at all what the victims feel about the file encryption, even when the amount of the ransom is gotten into their accounts. Thus, paying ransom typically does not result in an effective recovery. So, the users might simply lose their money for absolutely nothing.
Similarly, we advise you not to call the frauds as they advise. Do not move money into their wallets. There are no applications that could break the Guid virus or restore the information for free. For that reason, the only appropriate decision is to restore the data from possible backups (if offered).
Virus Summary
| Name | Guid Ransomware |
| File Extension | guid |
| Type | Ransomware |
| Family | DJVU |
| Short Description | The ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files. |
| Symptoms | File encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .guid extension to all the files modified by it. |
| Distribution Method | Adware bundles and software cracks |
| Similar Infections | Lokas, Besub, Nusar |
| Guid Removal Tool | GridinSoft Anti-Malware |
| Guid Decryption Tool | Emsisoft Djvu Decryptor |
Do not forget that the Internet is now loaded with infections comparable to the Guid ransomware. For example, this particular threat is generally identical to Brusaf and other ransomware-type infections. These harmful energies have actually been established in order to secure the essential data and express the demand for the users to pay the ransom. All these infections use the similar algorithm to create the particular key for effective data decryption.
Unless the Guid ransomware is still under the development process or has actually got some concealed bugs, it is not possible to restore the data by hand. Thus, the only working solution to avoid the loss of your essential information is to regularly keep updated backups of all your essential documents.
Another important piece of suggestions is to save the backups on special storage not linked to your main computer. For example, you might keep it on the USB Flash Drive, or some external hard disk drive, or by using the cloud data storage services. Keeping the backups on your regular drive is extremely risky, given that the backup might likewise be encrypted by the Guid .
Leakages for the Guid ransomware attack.
Guid uses lots of courses to infiltrate the susceptible computer systems. It is not particular what particular technique was used in your case, nevertheless, the invasion may happen by means of the following channels:
- bundling with third-party programs, mainly free apps;
- spam emails from the unidentified senders;
- sites providing free hosting;
- P2P (peer-to-peer) torrent software.
There are times when the Guid may camouflage itself as some authentic application, for example, through the deceptive alerts demanding setup of some software application update. This is the most common technique utilized by the scams to inject the Guid virus files into the system. In this manner users partially participate in its setup, without plainly comprehending the threat.
In addition, the scams may send unsolicited spam email with tricky notifies encouraging individuals to open suspicious accessories or click some download links, for example, those encouraging the people to open specific photos, text files, tax documents and other information.
No doubt, opening these files or clicking on the harmful links may essentially harm the system. Fake Acrobat Reader upgrade notifications may lead to the Guid ransomware infiltration. Likewise, downloading the cracked software might additionally include the ransomware installer. The last however not the least, installation of Guid may happen through some Trojan horses that might be set up stealthily into the system and without the user’s direct approval or even permission.
Preventing the Guid ransom virus injection.
Naturally, there is no absolute guarantee that your computer will be always without any malware attacks, however, we wish to share some useful suggestions with you to make it much safer. Make sure to pay really attention while browsing the web and specifically while getting cost-free programs. Do not open any suspicious email accessories, particularly if the sender is not understood to you.
Do not forget that specific freeware installer might also include some other additional apps in the bundle. These extra applications might be really destructive. It is of utmost value to keep your anti-virus software application and your os in general to be always properly upgraded.
It is rather logical that downloading pirated programs is illegal, however, additionally, such unapproved software application usage might likewise bring major damage to your computer. Thus, do not download any split programs. Plus, the reality that your current anti-virus did not protect the system from the Guid ransomware is a great factor for you to reevaluate your choices and change to another program that can render the safeguarding functions on a better level.
Below please find the quotation from the Guid text file:
ATTENTION! Don't worry, you can return all your files! All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-2P5WrE5b9f Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: restorealldata@firemail.cc Reserve e-mail address to contact us: gorentos@bitmessage.ch Our Telegram account: @datarestore
Screenshot of files with “.guid” extension added by the ransomware:”
Use GridinSoft Anti-Malware to remove Guid ransomware from your computer
1.Download GridinSoft Anti-Malware.
You can get GridinSoft Anti-Malware by clicking the button below:
2. Double-click on the setup file.
When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
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.
3. Press Install button for run GridinSoft Anti-Malware.
3.Once installed, GridinSoft Anti-Malware will automatically run.
4. Wait for the GridinSoft Anti-Malware scan to complete.
GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
5. Click on “Clean Now”.
When the scan has completed, 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.
Use Emsisoft Decryptor for restore guid files
You can get Emsisoft Decryptor by clicking the button below:
- Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
- Once the license terms are accepted, the primary decryptor user interface opens.
- By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
- Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
- After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
- The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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