Nymaim Trojan

Also Known As: Nymaim virus
Type: Trojan
Distribution: Moderate
Damage level: Severe

Nymaim virus removal guide

What is Nymaim?

Nymaim is high-risk trojan designed to infiltrate other viruses into the system. It essentially works as a malware dropper. Cyber criminals proliferate this virus by disguising it a regular file or app (e.g., a legitimate app, document, etc.) For example, Nymaim is distributed using the "Job Application" spam email campaign and The Roboto Condensed Font Was Not Found Scam" web scam.

Nymaim malware

First noticed back in 2013, Nymaim is essentially designed to distribute other viruses, such as ransomware, information stealers, and other exploit kits. The presence of Nymaim might lead to various issues. For example, infiltrated ransomware-type viruses might permanently encrypt/corrupt data and lock the computer screen. Information-stealing viruses record sensitive data (such as account credentials, banking information, keystrokes, web browsing activity, etc.). Cyber criminals could gain access to your bank, social network, and other personal accounts. These people aim to generate as much revenue as possible and will attempt to steal your savings and identity, potentially causing serious privacy issues and significant financial loss. Exploit kits might also perform various actions: some distribute malware, whilst others connect infected computers to botnets or misuse system resources to stealthily perform dubious tasks (e.g., mine cryptocurrency). Therefore, the Nymaim virus should be removed from your computer. If you suspect its presence, immediately run a full system scan using a reputable anti-virus suite and eliminate any detected threats. Furthermore, immediately change the passwords for all of your accounts.

Threat Summary:
NameNymaim virus
Threat TypeTrojan, Password stealing virus, Banking malware, Spyware
SymptomsTrojans are designed to stealthily infiltrate victim's computer and remain silent thus no particular symptoms are clearly visible on an infected machine.
Distribution methodsInfected email attachments, malicious online advertisements, social engineering, software cracks.
DamageStolen banking information, passwords, identity theft, 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 Malwarebytes.
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There are hundreds of viruses that are similar to Nymaim - Hancitor and Emotet are just some examples. Although they are developed by different cyber criminals and their behavior might differ slightly, all pose a direct threat to your privacy and computer safety. Therefore, you should eliminate these threats immediately.

How did Nymaim infiltrate my computer?

As mentioned above, Nymaim is typically proliferated using a disguise. For example, criminals distribute these viruses using fake updaters/installers (e.g., Adobe Flash Player updaters). These tools are promoted using rogue sites that display pop-ups containing deceptive messages claiming that certain software is outdated or missing. The message then encourages users to download/update supposedly outdated/missing software - this leads to infiltration of malware such as Nymaim. The same applies to spam email campaigns. Users receive emails encouraging them to open attached files (for example, MS Office documents). Once opened, they immediately execute a number of commands that infiltrate malware into the system. In any case, there are two main reasons for these computer infections: lack of knowledge of these threats and careless behavior.

How to avoid installation of malware?

To prevent this situation, be very cautious when browsing the internet and downloading/installing/updating software. Never open files or links received from suspicious/unrecognizable email addresses. Furthermore, download apps from official sources only and never use third party downloaders/installers/updaters. Keep installed programs and operating systems up-to-date, however, to achieve this, use implemented functions or tools provided by the official developer only. Having a reputable anti-virus/anti-spyware suite installed and running is also paramount, since these tools can detect and eliminate malware before it does any damage. The key to computer safety is caution. If you believe that your computer is already infected, we recommend running a scan with Malwarebytes for Windows to automatically eliminate infiltrated malware.

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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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 Malwarebytes 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 1 Download 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 the "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 Malwarebytes for Windows.

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.

QR Code
Nymaim virus QR code
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