Bisamware virus Removal Guide
What is Bisamware ransomware?
Bisamware ransomware encrypts users’ data and asks them to pay for decryption
The malicious program also changes the desktop wallpaper to guide victims
Bisamware ransomware is a new strain detected by security vendors. When the virus infiltrates the victims’ devices it almost immediately starts the encryption process using complicated algorithms. The affected files get appended with the .BISAMWARE extension, so for example, if a file was previously named picture.jpg after the encryption is complete, it would look like this – picture.jpg.BISAMWARE.
The icons also change to blank pages so you cannot see the content even in preview mode. If you try to open the damaged files, a prompt appears saying that Windows is unable to open the file. Shortly after, a ransom note SYSTEM=RANSOMWARE=INFECTED.TXT is generated on the user’s PC to inform them of what has happened and what they should do if they want to recover the files.
|TYPE||Ransomware, cryptovirus, data locking malware|
|DISTRIBUTION||Infected email attachments, peer-to-peer file sharing platforms, torrents, malicious ads|
|FILE RECOVERY||It is next to impossible to recover the files if you do not have backups or the decryption keys were not leaked; in some cases, recovery is successful with third-party software|
|ELIMINATION||Scan your machine with anti-malware software to eliminate the virus safely; this will not recover the locked files|
|SYSTEM FIX||You can avoid windows reinstallation with ReimageIntego maintenance tool, which can fix damaged files and system errors|
The ransom note
The full SYSTEM=RANSOMWARE=INFECTED.TXT ransom note reads as follows:
YOUR SYSTEM GOT INFECTED WITH A RANSOMWARE
CONTACT US DOWN BELOW AT OUR TOR ONION LIVE CHAT SYSTEM FOR DECRYPTION HELP
IF YOU “DONT” WANT THE FILES BACK – RESET YOUR PC
100% DECRYPTION AFTER PURCHASE OF DECRYPTION KEY – ONLY WE HAVE IT IN OUR DATABASE
TOR CHAT UNIQUE URL: –
YOU CAN CALL THE COPS – YOU CAN CALL ANY MASTER TECHNICAL SOFTWARE DEVELOPER BUT IT WONT HELP
WE ARE SPECIALIZED TO TARGET COMPANIES – THERE IS NO WAY TO RECOVER YOUR FILES WITHOUT GETTING THE DECRYPTION KEY
+TOR BROWSER TO ACCESS OUR TOR CHAT DOWNLOAD at hxxps://www.torproject.org/download/
+BITCOINS PURCHASE AT hxxps://www.blockchain.com/ , or hxxps://www.coinbase.com/ , or hxxps://www.binance.com/ , or hxxps://localbitcoins.com/
+WATCH TUTORIAL HOW TO BUY BITCOINS AT hxxp://yfoj3s7ov6e3k7pboeumnj6r*****.onion/how_to_purchase_bitcoins.mp4 , or hxxps://www.youtube.com/watch?v=MIUQnVHh9rU
The developers of Bisamware ransomware are demanding that victims pay a ransom to have their data returned, preferably in cryptocurrency form – specifically Bitcoin. Cybercriminals often choose cryptocurrency as payment because it is anonymous and difficult to trace.
It is highly advised not to contact cybercriminals, much less pay them, because they cannot be trusted. Many past ransomware victims have come forward and claimed that they never received the promised decryption tools after paying for them. Furthermore, it’s impossible to retrieve cryptocurrencies once you send them to another wallet.
Threat actors demand to get paid if victims want to recover their data
The most typical way that ransomware is introduced is through an executable file (.exe) that has been stored in a zip folder, embedded within a Microsoft Office document’s macros, or disguised as a fax or other viable attachments. This generally happens as a result of user carelessness and lack of knowledge about digital threats.
Many people enjoy using pirate download sites and obtaining “cracked” software. Torrent sites, peer-to-peer file sharing, and freeware platforms are ideal breeding grounds for all sorts of malware. When you use these websites, you have no way of knowing if the program you’re downloading is safe. It’s preferable to utilize official web stores and developer sites. Even though it might be more expensive in the short term, you may save money in the long term by keeping your system running smoothly.
Unfortunately, cybercriminals often fool people into downloading their harmful software by making it look trustworthy. For example, they may create an email that resembles a message from a legitimate and well-known company. These emails usually contain malicious links or attachments which, once opened, start the infection process.
Another popular way that users get infected with ransomware is by not having the latest security patches for their software. Software vulnerabilities can be exploited to install malicious programs, however, developers regularly release updates to prevent such attacks.
Remove malicious files
The important thing to do is disconnect the affected machine from the local network. For home users, disconnecting the ethernet cable should do the job. If this happened at your workplace, doing that might be complicated, so we have instructions for corporate environments at the bottom of this post.
If you try to recover your data first, it can result in permanent loss. It can also encrypt your files the second time. It will not stop until you remove the malicious files causing it first. You should not attempt removing the malicious program yourself unless you have experience.
Use anti-malware tools like SpyHunter 5Combo Cleaner or Malwarebytes to scan your system. This security software should find all the related files and entries and remove them automatically for you. In some cases, malware is not letting you use antivirus in normal mode, so you need to access Safe Mode and perform a full system scan from there:
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. – it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.
Windows 10 / Windows 8
- Right-click on Start button and select Settings.
- Scroll down to pick Update & Security.
- On the left side of the window, pick Recovery.
- Now scroll down to find Advanced Startup section.
- Click Restart now.
- Select Troubleshoot.
- Go to Advanced options.
- Select Startup Settings.
- Click Restart.
- Press 5 or click 5) Enable Safe Mode with Networking.
What to do with the damaged operating system?
Performance, stability, and usability issues, to the point where a full Windows reinstall is required, are expected after a malware infection. These types of infections can alter the Windows registry database, damage vital bootup, and other sections, delete or corrupt DLL files, etc. Once a system file is damaged by malware, antivirus software is not able to repair it.
This is why ReimageIntego was developed. It can fix a lot of the damage caused by an infection like this. Blue Screen errors, freezes, registry errors, damaged DLLs, etc., can make your computer completely unusable. By using this maintenance tool, you could avoid Windows reinstallation.
- Download the application by clicking on the link above
- Click on the ReimageRepair.exe
- If User Account Control (UAC) shows up, select Yes
- Press Install and wait till the program finishes the installation process
- The analysis of your machine will begin immediately
- Once complete, check the results – they will be listed in the Summary
- You can now click on each of the issues and fix them manually
- If you see many problems that you find difficult to fix, we recommend you purchase the license and fix them automatically.
Try recovering your files with third-party software
Only hackers hold the decryption key, which can unlock your files, so if you did not back them up previously, you possibly lost your files forever. You can try using data recovery software, but third-party programs cannot always decrypt the files. We suggest at least trying this method. Before proceeding, you have to copy the corrupted files and place them in a USB flash drive or another storage. And remember – only do this if you have already removed the Bisamware ransomware.
Before you begin, several pointers are important while dealing with this situation:
- Since the encrypted data on your computer might permanently be damaged by security or data recovery software, you should first make backups of it – use a USB flash drive or another storage.
- Only attempt to recover your files using this method after you perform a scan with anti-malware software.
Install data recovery software
- Download Data Recovery Pro.
- Double-click the installer to launch it.
- Follow on-screen instructions to install the software.
- As soon as you press Finish, you can use the app.
- Select Everything or pick individual folders where you want the files to be recovered from.
- Press Next.
- At the bottom, enable Deep scan and pick which Disks you want to be scanned.
- Press Scan and wait till it is complete.
- You can now pick which folders/files to recover – don’t forget you also have the option to search by the file name!
- Press Recover to retrieve your files.
Recommended security measures
- Secure web gateways can scan users’ web surfing traffic to identify malicious web ads that might lead them to the installation of ransomware.
- Secure Email Gateways with targeted attack protection are crucial for detecting and blocking malicious emails that deliver ransomware. These solutions protect against malicious attachments, malicious documents, and URLs in emails delivered to user computers.
- Monitoring tools can detect unusual file access activities, viruses, network C&C traffic, and CPU loads just in time to prevent ransomware activation.
- Mobile attack protection products, when used in conjunction with mobile device management (MDM) tools, can analyze applications on users’ devices and immediately alert them about any applications that might compromise the environment.
Getting rid of Bisamware virus. Follow these steps
Isolate the infected computer
Some ransomware strains aim to infect not only one computer but hijack the entire network. As soon as one of the machines is infected, malware can spread via network and encrypt files everywhere else, including Network Attached Storage (NAS) devices. If your computer is connected to a network, it is important to isolate it to prevent re-infection after ransomware removal is complete.
The easiest way to disconnect a PC from everything is simply to plug out the ethernet cable. However, in the corporate environment, this might be extremely difficult to do (also would take a long time). The method below will disconnect from all the networks, including local and the internet, isolating each of the machines involved.
If you are using some type of cloud storage you are connected to, you should disconnect from it immediately. It is also advisable to disconnect all the external devices, such as USB flash sticks, external HDDs, etc. Once the malware elimination process is finished, you can connect your computers to the network and internet, as explained above, but by pressing Enable instead.
Find a working decryptor for your files
File encryption is a process that is similar to applying a password to a particular file or folder. However, from a technical point of view, encryption is fundamentally different due to its complexity. By using encryption, threat actors use a unique set of alphanumeric characters as a password that can not easily be deciphered if the process is performed correctly.
There are several algorithms that can be used to lock data (whether for good or bad reasons); for example, AES uses the symmetric method of encryption, meaning that the key used to lock and unlock files is the same. Unfortunately, it is only accessible to the attackers who hold it on a remote server – they ask for a payment in exchange for it. This simple principle is what allows ransomware authors to prosper in this illegal business.
While many high-profile ransomware strains such as Djvu or Dharma use immaculate encryption methods, there are plenty of failures that can be observed within the code of some novice malware developers. For example, the keys could be stored locally, which would allow users to regain access to their files without paying. In some cases, ransomware does not even encrypt files due to bugs, although victims might believe the opposite due to the ransom note that shows up right after the infection and data encryption is completed.
Therefore, regardless of which crypto-malware affects your files, you should try to find the relevant decryptor if such exists. Security researchers are in a constant battle against cybercriminals. In some cases, they manage to create a working decryption tool that would allow victims to recover files for free.
Once you have identified which ransomware you are affected by, you should check the following links for a decryptor:
If you can’t find a decryptor that works for you, you should try the alternative methods we list below. Additionally, it is worth mentioning that it sometimes takes years for a working decryption tool to be developed, so there are always hopes for the future.
Create data backups to avoid file loss in the future
One of the many countermeasures for home users against ransomware is data backups. Even if your Windows get corrupted, you can reinstall everything from scratch and retrieve files from backups with minimal losses overall. Most importantly, you would not have to pay cybercriminals and risk your money as well.
Therefore, if you have already dealt with a ransomware attack, we strongly advise you to prepare backups for future use. There are two options available to you:
- Backup on a physical external drive, such as a USB flash drive or external HDD.
- Use cloud storage services.
The first method is not that convenient, however, as backups need to constantly be updated manually – although it is very reliable. Therefore, we highly advise choosing cloud storage instead – it is easy to set up and efficient to sustain. The problem with it is that storage space is limited unless you want to pay for the subscription.
Using Microsoft OneDrive
OneDrive is a built-in tool that comes with every modern Windows version. By default, you get 5 GB of storage that you can use for free. You can increase that storage space, but for a price. Here’s how to setup backups for OneDrive:
- Click on the OneDrive icon within your system tray.
- Select Help & Settings > Settings.
- If you don’t see your email under the Account tab, you should click Add an account and proceed with the on-screen instructions to set yourself up.
- Once done, move to the Backup tab and click Manage backup.
- Select Desktop, Documents, and Pictures, or a combination of whichever folders you want to backup.
- Press Start backup.
After this, all the files that are imported into the above-mentioned folders will be automatically backed for you. If you want to add other folders or files, you have to do that manually. For that, open File Explorer by pressing Win + E on your keyboard, and then click on the OneDrive icon. You should drag and drop folders you want to backup (or you can use Copy/Paste as well).
Using Google Drive
Google Drive is another great solution for free backups. The good news is that you get as much as 15GB for free by choosing this storage. There are also paid versions available, with significantly more storage to choose from.
You can access Google Drive via the web browser or use a desktop app you can download on the official website. If you want your files to be synced automatically, you will have to download the app, however.
- Download the Google Drive app installer and click on it.
- Wait a few seconds for it to be installed.
- Now click the arrow within your system tray – you should see Google Drive icon there, click it once.
- Click Get Started.
- Enter all the required information – your email/phone, and password.
- Now pick what you want to sync and backup. You can click on Choose Folder to add additional folders to the list.
- Once done, pick Next.
- Now you can select to sync items to be visible on your computer.
- Finally, press Start and wait till the sync is complete. Your files are now being backed up.
Report the incident to your local authorities
Ransomware is a huge business that is highly illegal, and authorities are very involved in catching malware operators. To have increased chances of identifying the culprits, the agencies need information. Therefore, by reporting the crime, you could help with stopping the cybercriminal activities and catching the threat actors. Make sure you include all the possible details, including how did you notice the attack, when it happened, etc. Additionally, providing documents such as ransom notes, examples of encrypted files, or malware executables would also be beneficial.
Law enforcement agencies typically deal with online fraud and cybercrime, although it depends on where you live. Here is the list of local authority groups that handle incidents like ransomware attacks, sorted by country:
If your country is not listed above, you should contact the local police department or communications center.
How to prevent from getting ransomware
Access your website securely from any location
When you work on the domain, site, blog, or different project that requires constant management, content creation, or coding, you may need to connect to the server and content management service more often. The best solution for creating a tighter network could be a dedicated/fixed IP address.
If you make your IP address static and set to your device, you can connect to the CMS from any location and do not create any additional issues for the server or network manager that needs to monitor connections and activities. VPN software providers like Private Internet Access can help you with such settings and offer the option to control the online reputation and manage projects easily from any part of the world.
Recover files after data-affecting malware attacks
While much of the data can be accidentally deleted due to various reasons, malware is one of the main culprits that can cause loss of pictures, documents, videos, and other important files. More serious malware infections lead to significant data loss when your documents, system files, and images get encrypted. In particular, ransomware is is a type of malware that focuses on such functions, so your files become useless without an ability to access them.
Even though there is little to no possibility to recover after file-locking threats, some applications have features for data recovery in the system. In some cases, Data Recovery Pro can also help to recover at least some portion of your data after data-locking virus infection or general cyber infection.
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