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How to avoid the installation of the LINPRA email virus?

Also Known As: LINPRA virus
Type: Trojan
Damage level: Severe

What is email virus?

One of the most popular ways to deliver malware is to send emails containing malicious attachments or website links. Recipients infect their computers by opening downloaded malicious files. Typically, emails used to deliver malware are disguised as official letters from legitimate companies, organizations, or other entities.

LINPRA email virus malware-spreading email spam campaign

LINPRA email virus in detail

This email is disguised as a letter from LINPRA (Lithuanian Engineering and Technology Industry Association) - an independent business organisation, representing Lithuanian engineering industry. LINPRA is an existing organization which has nothing to do with this malspam campaign.

It is likely that cybercriminals behind this email target companies in the engineering industry that are members of the LINPRA organization. Their goal is to trick recipients into believing that the file attached to this email contains a list of suspended LINPRA members and then opening it.

The file attached to this email is named "Sustabdytų narių sąrašas.pdf.zip". It contains an executable file named "Sustabdytų narių sąrašas.pdf.exe". This file is designed to infect computers with malware. Although, it is unclear what is the purpose of that malicious software. Either way, that file should not be opened.

It is possible that cybercriminals behind this email attempt to trick recipients into installing ransomware on their computers. Ransomware is a form of malware that encrypts files to make them inaccessible and generates a ransom note encouraging victims to contact the attackers and pay them a certain amount of cryptocurrency.

It is also possible that cybercriminals are using this email to trick recipients into installing some cryptocurrency miner. Cryptocurrency miners use hardware (for example, processors, graphics cards) to solve mathematical problems (to mince cryptocurrency like Bitcoin, Etherium, Tether).

Another popular type of malware that cybercriminals distribute via emails is an information stealer. Usually, malware of this type targets credit card details (e.g., cardholder name, CVV code, expiry date), login credentials (e.g., email address, username, password), social security numbers, and other sensitive information.

Threat Summary:
Name LINPRA virus
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Hoax Email attachment is a list of suspended LINPRA organization members
Attachment(s) Sustabdytų narių sąrašas.pdf.zip
Detection Names Avast (Win32:PWSX-gen [Trj]), BitDefender (Trojan.GenericKDZ.76566), ESET-NOD32 (A Variant Of MSIL/GenKryptik.FIAG), Kaspersky (HEUR:Trojan.MSIL.Taskun.gen), Microsoft (Trojan:MSIL/Tnega.RV!MTB), Full List Of Detections (VirusTotal)
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Payload Unknown malware
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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Malspam campaigns in general

Emails that cybercriminals use to proliferate malicious programs look like legitimate letters sent by existing, well-known entities. Recipients infect computers by downloading and opening a malicious file. More examples of emails that were (or still are used to deliver malware) are "Care Logistics Email Virus" and "Statement Report Email Virus".

Typically, files or links in emails of this type are used to distribute malicious software designed to encrypt files, steal personal information, mine cryptocurrency, provide remote access to the infected machines, etc. In one way or another, it is strongly recommended not to trust emails of this type (not to open their contents).

How did LINPRA email virus infect my computer?

As mentioned before, this email contains a ZIP file that has an executable file ("Sustabdytų narių sąrašas.pdf.exe") in it. That executable file infects a computer if it gets opened (executed). It is worth mentioning that there could be different versions of this email (the file attached to an email may have a different name, extension).

It is important to know that emails used to deliver malware can have different types of files attached to them. For example, they can contain Microsoft Office documents, PDF documents, archive files like RAR, JavaScript files, or other files attached to them. Most of the times, recipients infect systems by opening those files.

Malicious documents opened with MS Office 2010 and newer do not install malware unless users enable editing/content (macros commands) in them. However, if malicious documents are opened with older MS Office versions, they install malware automatically. It is because older versions of the MS Office do not have the "Protected View" mode.

How to avoid installation of malware?

It is recommended not to open files and links in emails received from suspicious, unknown addresses. It is common that emails of this kind are used to distribute malware. Also, it is advisable to use official websites and direct links to download files. Files downloaded through or from other sources can be malicious.

Installed programs should never be updated or activated with unofficial (third-party) tools - those tools tend to be designed to infect computers with one or another malware. Programs have to be updated or activated with tools provided by their official developers. Also, it is not legal to use cracking tools to activate legitimate programs.

Additionally, it is advisable to scan a computer for malicious programs, files or other threats regularly and do it with a reputable antivirus or anti-spyware software. If you've already opened "LINPRA email virus" attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Appearance of the email used to deliver malware (GIF):

linpra email virus email appearance gif

Text presented in this email:

Subject: Lietuvos inžinerijos ir technologijų pramonės asociacija

Laba diena, LINPRA nariai,

Gerbiami nariai,

Norime atkreipti jūsų dėmesį į tuos asociacijos narius, kurie buvo sustabdyti iki kito pranešimo apie asociacijos taisyklių pažeidimą.

Pirmą kartą suspenduojame penkiasdešimt savo asociacijos narių.

Todėl likusius narius rekomenduojama išbraukti iš priede pateikto sąrašo, nes visi, kurie prisijungs prie jų, bus nubausti.

Pagarbiai

Akvilė Andriuškaitė-Paurė

Komunikacijos projektų vadovė
                                                                                   
LINPRA

Lietuvos inžinerijos ir technologijų pramonės asociacija

Savanorių pr. 176C-803, LT-03154 Vilnius

+ 370 612 37091

akvile.andriuskaite@linpra.lt

linpra.lt

Malicious process running as "FileSystemControls" (its name may vary) in Task Manager:

linpra email virus filesystemcontrols malicious process

Malicious executable designed to install malware detected as a threat on Virustotal:

linpra email virus virustotal detections

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner 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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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Combo Cleaner Antivirus for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

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":

manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs.

These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Combo Cleaner Antivirus for Windows.

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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 pcrisk.com 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.

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