THREAT REMOVAL

DriedSister Virus – How to Remove & Restore .下物妹! Extension Files

This article has been created in order to help you by explaining how to remove DriedSister virus virus from your computer system and how to restore .下物妹! encrypted files.

Security experts discovered a dangerous new malware threat called the DriedSister virus. At the moment the virus employs only a limited number of attack techniques however future updates are expected.

Threat Summary

Name DriedSister
Type Ransomware, Cryptovirus
Short Description The DriedSister virus is an original threat that can cause a lot of damage to the victim machines. The virus can impact all components of the operating system.
Symptoms The victims may perceive performance issues and find that their data is renamed with the .下物妹! file type extension.
Distribution Method Spam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by malware

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User Experience Join Our Forum to Discuss DriedSister.
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.

DriedSister virus – Infection Process

The DriedSister virus can be distributed using different strategies. Depending on the specific attack campaign the hackers can utilize various mechanisms that can be customized in order to maximize the infection ratio. Usually the most popular way is to coordinate email spam messages that include social engineering elements. The hackers distribute these messages in order to convince the users into interacting with a malicious element that leads to the virus DriedSister virus infection.

The emails themselves can be contain file attachments that lead to the infections once they are executed. In certain situations they can be placed in archives protected by passwords, the required strings can be placed in the body contents. The hackers can also combine this with hyperlinks that link to offsite hosted instances. In the last few years two specific delivery mechanisms have become popular.

The first one involves the distribution of malware software installers that represent hacker-modified instances of popular software. They can be trial or free versions that are familiar to most computer users. The criminals download the legitimate files from the official vendor sites which are then modified to include the malware code. They are then attached or linked in the email messages. Another virus distribution mechanism relies on infected documents that can made in various types: rich text documents, spreadsheets and presentations. As soon as they are opened a notification prompt appears which asks the users to enable the built-in scripts. If this is done the malware infection is launched.

Browser hijackers can deliver the DriedSister virus as part of their behavior patterns. They represent malware browser plugins that seek to redirect the users to a hacker-controlled site. This is done by changing important settings of the most popular web browsers. Usually such threats are made compatible with Mozilla Firefox, Google Chrome, Internet Explorer, Safari, Opera and Microsoft Edge. Malware payloads can also be distributed on hacker-controlled sites and file sharing networks such as BitTorrent.

DriedSister virus – Analysis and Activity

The DriedSister virus is distributed using a variety of different mechanisms. At the moment email messages remain one of them most popular tactics. They make use of malware attachments that pose as useful software or files of user interest. The criminals make use of clever social engineering tactics in order to manipulate the recipients into interacting with the malware element. The other tactic is to use hyperlinks that link to offsite hosted instances. Usually the links lead to malware controlled sites or to the virus DriedSister virus samples themselves.

In connection with this two particular case scenarios have been identified. The first one is the use of malware software installers that lead to the DriedSister virus infection. These type of files are made by taking the legitimate software installers from their official sources (usually the vendor official site) and modifying them to include the malware code. They are then uploaded to hacker-controlled sites and emails such as this one. In some cases the victims may be able to avoid installation by unchecking certain options during the installation process.

The criminals can also use infected documents that mask as files of interest: invoices, letters, notifications and etc. They can be of different types: rich text documents, spreadsheets and presentations. Once the files are opened by the victims a notification prompt appears which asks them to enable the built-in macros. If this is done the virus infection follows. The criminals can also set up appropriate scam sites such as download portals that impersonate legitimate and popular web services. The hackers can also make use of redirects and banners to distribute the malware samples.

In certain situations the DriedSister virus files can be distributed through browser hijackers. They are malware browser plugins that are intent into changing the default settings of the web browser to point to a hacker-controlled site. During the initial infection malware infections can be caused, including the DriedSister virus. Such threats are usually made compatible with the most popular software: Google Chrome, Internet Explorer, Safari, Microsoft Edge, Mozilla Firefox and Opera.

DriedSister virus – Encryption Process

The DriedSister virus does not appear to be a descendant of any of the famous malware families. The security analysis shows that it is based on a framework that allows the code to be updated further. Future versions can include stealth protection techniques that can guard it against removal. This is effective against anti-virus products, sandboxes, debuggers or virtual machines. In certain situations the malware can be programmed into deleting itself if it is unable to bypass the security products to avoid detection.

If operating system changes are introduces they can impact the Windows registry which in turn can cause application or system failure, as well as severe performance issues. The compromised system can also be instituted with a code that connects the victim computer to a command and control (C&C) server. This enables the hacker operates to spy on the users in real time as well as take over control of the machines in real time. In certain attack scenarios the hackers can manipulate the Internet connectivity options to redirect the traffic through a hacker proxy. This enables the criminals to directly intercept all network-related activity. This is also useful in man-in-the-middle attacks.

When all components have executed correctly and in the prescribed order the ransomware engine is started. At the moment the files can be recovered easily by using a quality ant-spyware solution due to the weak cipher. We expect that future versions might enforce a stronger protection. Like other similar threats it uses a built-in list of target file type extensions: images, music, videos, backups, archives, databases, documents and etc. All processed data is renamed with the .下物妹! extension. The following ransomware note message is displayed in an application instance:

干物妹!身代金ウイルス
こんにちは!私はあなたが命じた身代 金のウイ」以です。

0
文書は私によつて靖号化されている.

A machine-translated version of it reads the following:

Dried sister! Ransom virus
Hello! I am the ice of a ransom you ordered. ”
dream
0
The document has been decrypted by me.
blood

How to Remove DriedSister virus and Restore .下物妹! Encrypted Files

In order to make sure that this malware is permanently gone from your computer, you should follow the manual or automatic removal instructions down below. If you have the experience in removing ransomware manually, we advise you to focus on the first 2 steps from the manual removal and to look for the registry files which we have explained in the analysis part above. Otherwise, if you want a more automatic and faster solution and lack the expertise in malware removal, we urge you to download an advanced anti-malware program, which aims to automatically perform the removal operation of DriedSister ransomware and secures your computer against future infections in real-time.

If you want to restore files that have been encrypted by this ransomware infection, we advise you to try out the alternative tools for file recovery down below in step “2. Restore files encrypted by .下物妹! Files Virus”. They may not guarantee fully that you will recover all of the files, but if you haven’t reinstalled your OS already, there is a good chance that you might just restore them.

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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 DriedSister from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove DriedSister

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 DriedSister 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 DriedSister 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 DriedSister 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 DriedSister 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 DriedSister.

Ransomware infections and DriedSister 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 DriedSister from Mac OS X.


Step 1: Uninstall DriedSister 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 DriedSister:

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 DriedSister. 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 DriedSister. 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 DriedSister 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 DriedSister. 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 DriedSister:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by DriedSister.

Ransomware infections and DriedSister 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.


DriedSister FAQ

What is DriedSister ransomware and how does it work?

DriedSister 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 DriedSister ransomware infect my computer?

Via several ways.DriedSister 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 DriedSister 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 .DriedSister files?

You can't. At this point the .DriedSister 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 .DriedSister files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by DriedSister 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 ".DriedSister" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .DriedSister 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 DriedSister 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 DriedSister ransomware and then remove it without causing any additional harm to your important .DriedSister files.

Also, keep in mind that viruses like DriedSister 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.

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