THREAT REMOVAL

Scarab-Osk Virus (Scarab Ransomware) – Remove and Restore .osk Files

Scarab-Osk virus image ransomware note .osk extension

The Scarab-osk virus is the newest descendant from the Scarab ransomware family. It follows the already established behavior tactics of the previous versions and renames the target data with the .osk extension. Its development shows that the computer hackers continue to base new threats using the base ransomware code and further modifications to it are expected.

Threat Summary

Name Scarab-Osk
Type Ransomware, Cryptovirus
Short Description The ransomware encrypts sensitive information on your computer system with the .osk extensions and demands a ransom to be paid to allegedly recover them.
Symptoms The ransomware will encrypt your files with a strong encryption algorithm.
Distribution Method Spam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware

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User Experience Join Our Forum to Discuss Scarab-Osk.
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.

Scarab-Osk Virus – Distribution Ways

The newest release of the Scarab ransomware family has been released as the Scarab-osk virus version. At the moment the initial distribution campaign seems to be directed primarily against English speaking users. This shows that the attack waves are targeted and carefully planned before engagement. We expect to see numerous other campaigns carrying the same payload with various techniques.

One of the proposed mechanisms is the use of email SPAM messages that use various social engineering techniques in order to manipulate as many users as possible. The operators can use various text and graphics from well-known sites and services and use them as bait for computer users. The sent messages are disguised as legitimate messages and distribute the payloads either attached or directly hyperlinked in the body contents. The emails are also one of the primary mechanisms for payload delivery. There are two main types that are the most common:

  • Software Installers — The computer hackers can bundle dangerous code into application installers of popular software such as creativity suites, productivity, system utilities and even computer games.
  • Malware Documents — The other strategy is to embed the malware code into files of various types: rich text documents, spreadsheets and presentations. Usually a notification prompt is presented to the users asking them to enable the built-in macros (scripts). If this is done the infection follows.

Virus strains like this one can also be distributed with the help of browser hijackers that are dangerous plugins made for the most popular browsers. They are usually uploaded to the relevant plugin repositories using false developer credentials, user reviews and elaborate descriptions that attempt to fool the users into installing them. Theyusually redirect the victims to a hacker-controlled site and steal sensitive data from the victim hosts. Any malware actions, including the virus delivery, follow once the first stage of the behavior pattern is executed.

The Scarab-Osk virus can also be delivered using web scripts of different types that can also affect legitimate sites through ad and affiliate networks. This include the likes of redirects, pop-ups, banners and in-line hyperlinks.

Scarab-Osk Virus – In-Depth Analysis

The Scarab-Osk virus is the newest strain of the Scarab ransomware family. The code analysis reveals that it contains much of the behavior patterns that correspond to the previous versions.

It contains the same modular malware engine which can be tweaked according to the exact campaign. As such it can begin with an information gathering component that can hijack sensitive content from the affected devices. There are two primary types that are commonly distinguished:

  • Private Data — It can be used to directly expose the victim’s identity. This is made possible by instructing the malware engine to harvest strings that may reveal the data. Examples include a person’s name, address, location, interests, passwords and account credentials.
  • Campaign Metrics — Part of the hijacked information can be used to optimize the attacks. Such data includes information such as a profile of the installed hardware components and certain values from the operating system.

The collected data can then be fed to a stealth protection module which can protect the virus instance from detection and removal. It scans for the presence of anti-virus products, virtual machine hosts and sandbox environments. Advanced strains can be configured into deleting themselves if they are unable to process this step.

After this the virus has already been placed on the target system and the other follow-up components can be initiated. Usually Windows Registry entries are affected. Depending on the targets — user-installed applications or the operating system itself certain functions or services can fail to start properly. In addition overall performance can be affected. When the virus is deployed as a persistent threat the associated engine will deploy many additional modifications. This includes boot options by removing the ability to enter into the recovery boot menu. This also renders most manual recovery options non-working. In such cases we advise victims to follow our in-depth instructions and use a quality anti-spyware solution.

Furthermore the Scarab-Osk virus strain is capable of instituting a network connection with the hacker-controlled servers. If configured so this module can be used to spy on the victims in real time and take over control of their machines at any given time. This mechanism is also used for effective deployment of additional threats.

Additional modules can be loaded if the hackers configure the released strains in the appropriate manner. The deployed virus file can be modified in accordance to the predefined targets and the campaign in general.

Scarab-Osk Virus – Encryption Process

The Scarab-Osk virus uses the same complex encryption algorithm and cipher as used in previous versions of the family. It targets files based on a predefined list of target file type extensions:

  • Archives
  • Databases
  • Documents
  • Backups
  • Images
  • Videos
  • Music

The affected files have their names hashed using a preset algorithm and the .osk extension is applied to them. The associated ransom message is created in a HOW TO RECOVER ENCRYPTED FILES.TXT file which reads the following:

YOUR FILES ARE CRYPTED!
Your personal identifier
6A02000000000000***46D93F
Your documents, photos, databases, saving in games and other important data were encrypted.
Data recovery requires a decryptor.
To receive the decryptor, you should send an e-mail to translatos@protonmail.com
In the letter, indicate your personal identifier (see At the beginning of this document).
If I can not connect through the mail, I can not
* Register on the site https://bitmsg.me (online delivery service Bitmessage)
* Send an email to BM-2cUvL7bCPmMZc7QonNfrdLQesmpxX9Sr53 with your email and ID of the identifier
Next, you pay the cost of the decryptor. In the reply letter you will receive the address Bitcoin-purse, for which it is necessary to perform the transfer of money in the amount of 0,013 bitcoin ( 0,013 BTC ~ 100 $ ).
If you do not have bitocoins
* Create a Bitcoin purse: https://blockchain.info/en/wallet/new
* Acquire the Bitcoin crypto currency:
https://localbitcoins.com/buy_bitcoins (Visa / MasterCard, etc.)
https://www.bitcoin.it/wiki (instruction for beginners)
* Send 0,013 BTC to the address in the email address
When the money transfer is confirmed, you will receive a file decryption for your computer.
After starting the decryption program, all your files will be restored.
Attention!
* Do not attempt to uninstall the program or run antivirus software
* Attempts to self-decrypt files will result in the loss of your data
* Decoders of other users are incompatible with your data, as each user unique encryption key

Remove Scarab-Osk Virus and Restore .osk Files

If your computer system got infected with the Scarab-Osk ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.

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Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

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.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove Scarab-Osk from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove Scarab-Osk

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall Scarab-Osk and related software 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:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by Scarab-Osk 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 Scarab-Osk there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
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.

IMPORTANT!
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: Scan for Scarab-Osk with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by Scarab-Osk.

Ransomware infections and Scarab-Osk 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.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of Scarab-Osk from Mac OS X.


Step 1: Uninstall Scarab-Osk and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to Scarab-Osk:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Scarab-Osk. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Scarab-Osk. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Scarab-Osk via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Scarab-Osk. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Click the button below below to download SpyHunter for Mac and scan for Scarab-Osk:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by Scarab-Osk.

Ransomware infections and Scarab-Osk 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.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Scarab-Osk FAQ

What is Scarab-Osk ransomware and how does it work?

Scarab-Osk 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 algorithm how 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.

How does Scarab-Osk ransomware infect my computer?

Via several ways.Scarab-Osk Ransomware infects computers by being sent via phishing e-mails, 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.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of Scarab-Osk 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 .Scarab-Osk files?

You can't. At this point the .Scarab-Osk files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .Scarab-Osk files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by Scarab-Osk ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".Scarab-Osk" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Scarab-Osk files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of Scarab-Osk ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate Scarab-Osk ransomware and then remove it without causing any additional harm to your important .Scarab-Osk files.

Also, keep in mind that viruses like Scarab-Osk ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

1 Comment

  1. AvatarElken

    Please i need urgent need to this one. Good arrangement on this. please give me an email so that i will contact you immediately..

    Kind regards,

    Donz

    Reply

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