Backdoor:MSIL/PasGen.YA!rfn — PasGen Backdoor Removal Guide

Written by Wilbur Woodham
If you spectate the alert of Backdoor:MSIL/PasGen.YA!rfn detection, it seems that your computer has a problem. All malicious programs are dangerous, with no exceptions. PasGen gives the criminals an easy access to your system, or perhaps connects it to the botnet.
GridinSoft Anti-Malware Review
It is better to prevent, than repair and repent!
When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

Any malware exists with the only target – generate profits on you1. And the developers of these things are not thinking of ethicality – they utilize all available methods. Taking your personal data, receiving the payments for the banners you watch for them, exploiting your hardware to mine cryptocurrencies – that is not the full list of what they do. Do you want to be a riding steed? That is a rhetorical question.

What does the notification with Backdoor:MSIL/PasGen.YA!rfn detection mean?

The Backdoor:MSIL/PasGen.YA!rfn detection you can see in the lower right corner is displayed to you by Microsoft Defender. That anti-malware software is quite OK at scanning, but prone to be basically unstable. It is unprotected to malware invasions, it has a glitchy interface and problematic malware removal features. Thus, the pop-up which says concerning the PasGen is simply an alert that Defender has found it. To remove it, you will likely need to make use of another anti-malware program.

Backdoor:MSIL/PasGen.YA!rfn found

Microsoft Defender: “Backdoor:MSIL/PasGen.YA!rfn”

The exact Backdoor:MSIL/PasGen.YA!rfn virus is a very nasty thing. This malware is designed to be a sneaky intruder, which works as a remote-access tool. When you grant somebody remote access willingly, it is OK, but PasGen will not ask you if you wish to provide it. After connecting to your PC, criminals are able to do whatever they want – snatching your files, examining your messages, collecting personal data, et cetera. Backdoors usually carry an additional stealer – the virus that is developed to pick up all possible information about you. Nonetheless, a lot more prevalent use of the backdoors is forming the botnet. After that, the network of attacked computers may be put to use to conduct DDoS attacks or to inflate the vote results on different websites.

Backdoor Summary:

NamePasGen Backdoor
DamageGain access to the operating system to perform various malicious actions.
SimilarWin64 Vankul, Msil Androme, Lotok, Quasarrat, Trojan Smokeloader Pamtb, Asyncrat, Smokeloader, Msil Dcrat
Fix ToolSee If Your System Has Been Affected by PasGen backdoor
Shortly about backdoors

Backdoors are viruses that can obtain both separated and integrated shapes. One time you can discover that an official program from a widely known company has a capability that makes it possible for somebody to connect to your system. Will it be someone from the developers or a 3rd party – no one knows. But the scandal when this aspect is found in a legitimate program is pretty much impossible to miss. There is additionally gossip that there is a hardware-based backdoor in Intel CPUs2.

Is Backdoor:MSIL/PasGen.YA!rfn dangerous?

As I have actually pointed out previously, non-harmful malware does not exist. And Backdoor:MSIL/PasGen.YA!rfn is not an exclusion. This backdoor does not deal a many harm just after it introduces. However, it will likely be a very bad surprise when a random online forum or page in the Internet will not let you in, since your IP-address is banned after the DDoS attack. But even if it is not crucial for you – is it positive in any way to realise that someone can simply access your PC, read your discussions, open your files, as well as spectate what you do?

The spyware that is usually present as a supplement to the Backdoor:MSIL/PasGen.YA!rfn malware will be just another argument to remove it as fast as you can. Nowadays, when users’ information is valued exceptionally high, it is too silly to provide the burglars such an opportunity. Even worse if the spyware will somehow handle to take your financial info. Seeing zeros on your financial account is the most awful nightmare, in my opinion.

How did I get this virus?

It is difficult to line the origins of malware on your PC. Nowadays, things are mixed up, and distribution ways used by adware 5 years ago may be used by spyware these days. But if we abstract from the exact distribution way and will think about why it works, the explanation will be very simple – low level of cybersecurity awareness. People press on promotions on weird websites, click the pop-ups they receive in their web browsers, call the “Microsoft tech support” thinking that the strange banner that says about malware is true. It is important to recognize what is legit – to prevent misconceptions when attempting to determine a virus.

Microsoft tech support scam

The example of Microsoft Tech support scam banner

Nowadays, there are two of the most extensive ways of malware spreading – bait emails and injection into a hacked program. While the first one is not so easy to stay away from – you must know a lot to understand a counterfeit – the second one is simple to handle: just don’t utilize cracked applications. Torrent-trackers and various other providers of “free” applications (which are, exactly, paid, but with a disabled license checking) are really a giveaway point of malware. And Backdoor:MSIL/PasGen.YA!rfn is just among them.

How to remove the Backdoor:MSIL/PasGen.YA!rfn from my PC?

Backdoor:MSIL/PasGen.YA!rfn malware is very hard to erase by hand. It stores its documents in numerous places throughout the disk, and can get back itself from one of the parts. In addition, numerous changes in the registry, networking configurations and also Group Policies are really hard to identify and change to the original. It is far better to utilize a specific app – exactly, an anti-malware app. GridinSoft Anti-Malware will fit the best for virus elimination purposes.

Why GridinSoft Anti-Malware? It is very light-weight and has its databases updated just about every hour. Moreover, it does not have such problems and vulnerabilities as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware suitable for taking out malware of any form.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of PasGen the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
How to Remove Backdoor:MSIL/PasGen.YA!rfn Malware

Name: Backdoor:MSIL/PasGen.YA!rfn

Description: If you have seen a message showing the “Backdoor:MSIL/PasGen.YA!rfn found”, it seems that your system is in trouble. The PasGen virus was detected, but to remove it, you need to use a security tool. Windows Defender, which has shown you this message, has detected the malware. However, Defender is not a reliable thing - it is prone to malfunction when it comes to malware removal. Getting the Backdoor:MSIL/PasGen.YA!rfn malware on your PC is an unpleasant thing, and removing it as soon as possible must be your primary task.

Operating System: Windows

Application Category: Backdoor

User Review
4.17 (18 votes)
Comments Rating 0 (0 reviews)


  1. Read about malware types on GridinSoft Threat encyclopedia.
  2. Gossip about the backdoor in Intel processors on Reddit.

About the author

Wilbur Woodham

I was a technical writer from early in my career, and consider IT Security one of my foundational skills. I’m sharing my experience here, and I hope you find it useful.

Leave a Reply