How to remove Trojan Win32/Tiggre!rfn malware

Also Known As: Trojan Win32/Tiggre!rfn malware
Type: Trojan
Damage level: Severe

What kind of malware is Trojan Win32/Tiggre!rfn?

Trojan Win32/Tiggre!rfn is high-risk malware designed to perform a number of malicious tasks on victims' computers. It is also known as "Trojan.GenericKD.12694003" (by BitDefender) and "W32/Autoit.CGO!tr" (by Fortinet).

Trojan Win32/Tiggre!rfn is distributed in various ways, including spam emails (malicious attachments), fake Adobe Flash Player updaters, malicious websites, chain infections, and even Facebook messages.

Trojan Win32/Tiggre!rfn malware

Trojan Win32/Tiggre!rfn malware in detail

Trojan Win32/Tiggre!rfn is versatile malware, since it performs various functions depending on developers' choices. For example, it can misuse system resources to mine cryptocurrency. The entire crypto-mining process essentially based on solving various "mathematical equations". Mining tools employ system resources to perform calculations.

Each time an "equation" is solved, a single unit of currency (e.g., 1 Bitcoin) is mined. Since an identical "equation" is solved by a number of computers simultaneously, the reward is split between each device depending on the power of the device and how much work is performed. All revenue is received by cyber criminals (crypto wallet), whilst users receive nothing in return.

In fact, all this is done without their consent, and since mining takes up to 100% of computer resources, systems often become unstable and virtually unusable. Furthermore, within certain circumstances (high room temperatures, poor cooling systems, etc.) hardware can be damaged (components might overheat).

Trojan Win32/Tiggre!rfn also gathers various data, including saved logins/passwords, keystrokes, banking information, and so on.

Collected data is often misused to generate revenue. Therefore, the presence of malware such as Trojan Win32/Tiggre!rfn might lead to serious financial and privacy issues (e.g., cyber criminals can transfer funds to their accounts, purchase illegal items under your name, and so on).

In some cases, Trojan Win32/Tiggre!rfn infiltrates systems along with a number of adware-type applications. These programs are not as harmful as Trojan Win32/Tiggre!rfn, but can be frustrating and problematic. Adware-type programs typically deliver intrusive advertisements and gather sensitive data.

Intrusive ads conceal underlying website content (thereby significantly diminishing the browsing experience), and also redirect to malicious sites and even run scripts that stealthily download and install malware. Clicking these ads can lead to malicious sites.

Furthermore, adware gathers IP addresses, URLs visited, search queries, pages viewed, and other data relating to browsing activity. Collected information is shared with third parties (potentially, cyber criminals). Therefore, adware poses a threat to your privacy and Internet browsing safety. For these reasons, all adware-type apps must be eliminated immediately.

Threat Summary:
Name Trojan Win32/Tiggre!rfn malware
Threat Type Trojan, Password stealing virus, Banking malware, Spyware
Detection Names Avast (Win32:TrojanX-gen [Trj]), BitDefender (Trojan.GenericKD.41401183), ESET-NOD32 (A Variant Of Win32/Kryptik.GUFO), Kaspersky (Backdoor.Win32.Androm.srmx), Full List (VirusTotal)
Symptoms Trojans are designed to stealthily infiltrate victim's computer and remain silent thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software cracks.
Damage Stolen 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 Combo Cleaner.
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Similarities with other malware

Trojan Win32/Tiggre!rfn is very similar to Pony, TrickBot, and FormBook. In fact, there are dozens of viruses that also gather information, mine cryptocurrencies, and perform other malicious tasks. Adware-type apps share many similarities.

By offering 'useful features', unwanted programs attempt to give the impression of legitimacy, however, rather than enabling the functions promised, adware poses a direct threat to your privacy and Internet browsing safety. The only purpose of this software is to help developers generate passive revenue.

How did Trojan Win32/Tiggre!rfn infect my computer?

As mentioned above, Trojan Win32/Tiggre!rfn is promoted using spam emails, fake Flash Player updaters, and Facebook. Spam emails contain malicious attachments (e.g., MS Office documents, JavaScript files, etc.) that, once opened, stealthily download and install malware. Fake updaters claim that the player is outdated (although it is not) and encourage users to renew it.

Rather than updating the player, however, these tools download and install Trojan Win32/Tiggre!rfn. Criminals also proliferate this malware via malicious sites that, once opened, execute scripts designed to download and install Trojan Win32/Tiggre!rfn without consent.

Another method is "chain-infecting": a computer is infected with malware that proliferates other viruses (in this case, Trojan Win32/Tiggre!rfn). Developers also use scripts that send spam messages on Facebook. The message simply contains a video file, however, this is a disguise - rather than opening the video, the user will open a AutoIt script that will infect the system.

How to avoid installation of malware?

The main reasons for computer infections are poor knowledge and careless behavior. The key to safety is caution. Therefore, pay close attention when browsing the Internet. Think twice before opening files/links received via email, Facebook accounts, Skype, and so on.

If files/links seem irrelevant or have been sent from suspicious/unrecognizable names/email addresses, delete these messages immediately and certainly do not open attached files/links. Furthermore, keep installed applications up-to-date and remember that criminals proliferate malware via fake updaters.

Therefore, apps should be renewed using implemented update features or tools provided by the official developers only. Having a reputable anti-virus/anti-spyware suite installed and running is also paramount.

If you believe that your computer is infected with Trojan Win32/Tiggre!rfn, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT 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's better to let antivirus or anti-malware programs do it 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's an example of a suspicious program running on 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 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 Autoruns application and locate the malware file that you want to eliminate.

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

locate the malware file you want to remove

After removing the malware through Autoruns application (this ensures that the malware won't 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 file 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 help remove any malware from your computer. Note that manual threat removal requires advanced computer skills, it's recommended to leave malware removal to antivirus and anti-malware programs.

These steps might not work with advanced malware infections. As always it's better to avoid getting infected that try to remove malware afterwards. To keep your computer safe be sure to install 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.

Frequently Asked Questions (FAQ)

My computer is infected with Trojan Win32/Tiggre!rfn malware, should I format my storage device to get rid of it?

You can remove Trojan Win32/Tiggre!rfn from the operating system by following the steps provided in our removal guide. It is not necessary to format the storage device to remove it.

What are the biggest issues that malware can cause?

The biggest issues that software of this type can cause are monetary and data loss, identity theft, decreased computer performance, and further infections.

What is the purpose of Trojan Win32/Tiggre!rfn malware?

It can be used for different purposes. It is known that cybercriminals use it to mine cryptocurrency and (or) gather various data (including saved logins/passwords, keystrokes, and banking information). We also found that this malware often injects some adware.

How did Trojan Win32/Tiggre!rfn infiltrate my computer?

The Trojan Win32/Tiggre!rfn malware is distributed via spam emails (malicious attachments), fake Adobe Flash Player updaters, malicious web poages, other malicious programs, and even Facebook messages.

Will Combo Cleaner protect me from malware?

Yes, Combo Cleaner will remove malware from the operating system. It can detect almost all known malware. If a computer is infected with high-end malware, it must be scanned using a full scan. Otherwise, the antivirus program will not detect malware that hides deep in the operating system.

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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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