How to remove Rodentia ransomware from the system

Also Known As: Rodentia virus
Distribution: Low
Damage level: Severe

Rodentia ransomware removal instructions

What is Rodentia?

First discovered by MalwareHunterTeam, Rodentia is a ransomware-type infection that belongs to the Jigsaw ransomware family. The purpose of this malware is to stealthily infiltrate computers, encrypt data, and make ransom demands. This behavior is very common to ransomware-type infections. Note, however, that Rodentia is poorly-programmed and does not actually encrypt files. It simply displays a pop-up window that contains a ransom-demand message.

The message states that files are encrypted and that victims must pay a ransom to restore them. It is also stated that a certain number of files are deleted each hour. Rodentia has a number of flaws and is thus unable to encrypt data, however, it is currently unconfirmed whether it deletes data - this function may or may not work. Additionally, there is a strong possibility that criminals will release an updated version of Rodentia, which will encrypt data. The cost of "recovery" is $20, which is minimal as compared to other ransomware infections that demand thousands of dollars. Regardless of the cost, do not pay (even if your data is compromised). Ransomware developers generally ignore victims after they submit payments. Paying simply supports cyber criminals' malicious businesses and users receive nothing in return. Therefore, we strongly advise you to ignore all requests to contact these people or submit payments. At time of research, this malware was unable to encrypt data, however, it might start to delete files. Therefore, you should immediately scan the system with a reputable anti-virus/anti-spyware suite and eliminate all detected threats.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Rodentia decrypt instructions

The Internet is full of high-risk ransomware infections that actually encrypt data and make ransom demands. YOUR_LAST_CHANCE, CROWN, and Dqb are just some examples from many. Although the developers differ, these viruses are virtually identical. There are typically just two major differences: size of ransom and type of encryption algorithm used. Unfortunately, encryptions are often performed using AES, RSA, and other similar cryptographies that generate unique decryption keys. Therefore, unless the virus has flaws, manual decryption without the involvement of the developers (not recommended) is impossible. To prevent data loss, we strongly advise you to maintain regular backups. Bear in mind, however, that locally stored backups are compromised with regular data, and thus you should store them on remote servers or unplugged storage devices. Also have multiple backup copies stored in different locations, since there is always the chance that servers/hardware can be damaged.

How did ransomware infect my computer?

Infections such as Rodentia are usually distributed using trojams, fake software 'cracks' and updaters, spam email campaigns, and third party software download sources. Trojans are malicious applications designed to cause "chain infections". These apps infiltrate computers and inject them with additional malware. Fake software cracks inject malware rather than activating paid software free of charge. The same applies to fake updaters, which infect systems by exploiting outdated software bugs/flaws or simply downloading and installing malware rather than updates. Criminals employ spam campaigns to send hundreds of thousands of emails containing deceptive messages and malicious attachments. These messages usually present attachments as 'important documents' - in this way, recipients are tricked into opening malicious links/files. Finally, be aware of unofficial software download sources, such as Peer-to-Peer (P2P) networks, free file hosting/freeware download websites, and similar. As with spam email campaigns, these sources are used to proliferate malware by presenting it as legitimate software - users end up manually downloading and installing malware.

Threat Summary:
Name Rodentia virus
Threat Type Ransomware, Crypto Virus, Files locker
Ransom Demanding Message Pop-up window
Ransom Amount $20
Cryptowallet Address 3K4XqrepBogMkrFJizfKt4gs8byGhQKXn5 (Bitcoin)
Detection Names (very important pdf.exe) Avast (Win32:Trojan-gen), BitDefender (Generic.MSIL.Ransomware.Jigsaw.7950C93A), ESET-NOD32 (A Variant Of MSIL/Filecoder.Jigsaw.B), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Rogue Process Name Firefox - ransomware is disguised as Mozilla Firefox web browser.
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Additional Information At present, this ransomware does not encrypt data (despite its claims), however, there is a high probability that it is capable of deleting files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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How to protect yourself from ransomware infections?

To prevent this situation, be very cautious when downloading/installing/updating software and browsing the Internet. Carefully analyze each email attachment received. Files/links received from suspicious/unrecognizable emails should never be opened. Your programs should be downloaded from official sources only, preferably using direct download links. Third party downloaders/installers usually include rogue applications, and thus such tools should never be used. Proper software maintenance is also extremely important. Keep installed applications and operating systems up-to-date, however, use implemented functions or tools provided by the official developer. Bear in mind that software piracy is a cyber crime and most cracking tools are fake. Therefore, the risk of system infection is extremely high. Never attempt to activate installed software using any third party/illegal tools. Have a reputable anti-virus/anti-spyware suite installed and running - these tools eliminate most infections before they can harm the system. The key to computer safety is caution. If your computer is already infected with Rodentia, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

The appearance of Rodentia ransomware pop-up (GIF):

Rodentia pop-up gif

Text presented within this pop-up:

ROFL you just open'd Rodentia Ransomware, welcome numbnuts, ay now listen Your personal files are being deleted. Your photos, videos, documents, and so much more :A But, don't worry! There's a way to please me and save your shit. I've encrypted your personal files, so you can't access them. Every hour some files will be deleted, bye bye, sayonara, adios, Anyway every hour your file deletion size increases. It starts out slowly then increases rapidly. During the first 24 hour you will only lose a few files, the second day a few hundred, the third day a few thousand, and so on. If you turn off your pc or try to close Rodentia, when your pc starts again 1000 files will be deleted as punishment. Ay so you know what to do send me that MS and your files will be decrypted P.S theres so much security here that even if you try to do anything you will fail_

send at leat $20 worth of Bitcoin
bitcoin address: 3K4XqrepBogMkrFJizfKt4gs8byGhQKXn5

Screenshot of Rodentia's process ("Firefox" - disguised as Mozilla Firefox web browser) in Windows Task Manager:

Rodentia process in Windows Task Manager

Rodentia ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Rodentia virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Rodentia ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Rodentia ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Rodentia are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Rodentia, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Rodentia ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Rodentia ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Rodentia virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Rodentia virus on your mobile device.
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