Koom Virus – Details
Koom is a destructive software functioning as common ransomware. Michael Gillespie, the widely known virus researcher, very first found this new name in the DJVU ransomware family.
Koom was created for the sole purpose to encrypt all popular file types. Logically, as soon as the file encryption is effectively achieved, the users are not able to get access to them. Koom ransomware adds its own “.koom” to all the encrypted data. For example, the file “price_list.xls”, once modified by Koom, will be entitled as “price_list.xls.koom”. Once the encryption is achieved, Koom puts its own distinct text document (_readme.txt) into all the folders that keep the encrypted files.
The alert mentioned by text file requesting the random os extremely similar to the alerts offered by other ransomware threats belonging to the DJVU family. The caution basically shows that the files have been encrypted and the only solution to get access to it is to use a distinct standalone key. Regretfully, this declaration is absolutely real.
The method to encrypt the files utilized by Koom is not completely investigated. Nevertheless, there is no doubt that each computer owner might be provided an unique decryption key, which is absolutely special. It is very difficult to recover the data without the appropriate type in place.
“Don’t worry, you can return all your files!”, from text file message:
One more peculiarity of the Koom ransomware is that the users are unable to get access to the key. The decrypting key is hosted on a special server under the total control by the scoundrels who have actually released the Koom virus into the internet. In order to acquire the key and restore the crucial data, the users are told to contact the frauds by means of email or by telegram and to pay the ransom in the amount of $980.
The message also states that individuals should contact the Koom authors within 72 hours upon the minute of the data file encryption. The alert indicates that by doing so individuals will get a 50% discount, for that reason, the ransom amount drops down to $490.
No matter what the amount of the ransom is, we strongly encourage that you do not pay the ransom. There is no guarantee that these online crooks will keep their promises, so they might not care at all what the victims feel about the encryption, even when the amount of the ransom is received into their accounts. Hence, paying ransom frequently does not lead to a successful healing. So, the users might simply lose their money for absolutely nothing.
Similarly, we prompt you not to contact the frauds as they advise. Do not move cash into their wallets. There are no applications that might split the Koom ransomware or restore the information at no cost. For that reason, the only proper choice is to restore the information from possible backups (if available).
|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 .koom extension to all the files modified by it.|
|Distribution Method||Adware bundles and software cracks|
|Similar Infections||Lokas, Besub, Nusar|
|Koom Removal Tool||GridinSoft Anti-Malware|
|Koom Decryption Tool||Emsisoft Djvu Decryptor|
Do not forget that the Web is now filled with infections similar to the Koom virus. For instance, this particular danger is generally identical to Brusaf and other ransomware-type infections. These harmful energies have been established in order to secure the essential data and reveal the demand for the users to pay the ransom. All these infections utilize the similar algorithm to create the specific key for successful information decryption.
Unless the Koom ransomware is still under the advancement process or has got some concealed bugs, it is not possible to bring back the information by hand. Therefore, the only working service to prevent the loss of your crucial information is to regularly maintain updated backups of all your vital data.
Another crucial piece of guidance is to store the backups on special storage not linked to your primary PC. For instance, you may 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 system drive is really risky, given that the backup may likewise be encrypted by the Koom ransomware.
Leaks for the Koom ransomware attack.
Koom uses lots of paths to penetrate the vulnerable computers. It is not certain what particular technique was utilized in your case, nevertheless, the invasion may take place through the following channels:
- bundling with third-party programs, mainly freeware;
- spam e-mails from the unknown senders;
- websites offering complimentary hosting;
- P2P (peer-to-peer) torrent downloads.
There are times when the Koom virus might disguise itself as some real application, for example, through the deceptive informs requiring setup of some software update. This is the most typical trick used by the scams to inject the Koom ransomware files into the system. By doing this users partly take part in its setup, without plainly understanding the danger.
Additionally, the scams may send out unsolicited spam email with challenging notifies motivating individuals to open dubious accessories or click some download links, for example, those encouraging the people to open particular pictures, text files, tax documents and other info.
No doubt, opening these files or clicking the destructive links may essentially damage the system. Fake Adobe Flash Player upgrade notifications may result in the Koom ransomware seepage. Similarly, downloading the split software may in addition include the ransomware installer. The last but not the least, setup of Koom may occur through some Trojan horses that might be installed stealthily into the system and without the user’s direct consent or perhaps approval.
Preventing the Koom ransom virus attack.
Naturally, there is no outright warranty that your computer system will be constantly without any malware attacks, however, we would like to share some useful tips with you to make it much safer. Make certain to pay very very close attention while browsing the web and especially while getting cost-free programs. Do not open any dubious e-mail attachments, particularly if the sender is not understood to you.
Do not forget that specific freeware installer might likewise consist of some other additional apps in the bundle. These additional applications might be really destructive. It is of utmost value to keep your anti-virus software and your os in basic to be constantly appropriately updated.
It is quite rational that downloading cracked programs is illegal, however, furthermore, such unauthorized software application usage might likewise bring major damage to your system. For this reason, do not download any broken programs. Plus, the reality that your current anti-virus did not safeguard the system from the Koom ransomware is a good factor for you to reevaluate your choices and switch to another program that can render the protecting functions on a much better level.
Below please find the quotation from the Koom 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: email@example.com Reserve e-mail address to contact us: firstname.lastname@example.org Our Telegram account: @datarestore
Screenshot of files with “.koom” extension added by the ransomware:”
Use GridinSoft Anti-Malware to remove Koom 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”.
Use Emsisoft Decryptor for restore koom 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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