Trojan:JS/Downloader — JS/Downloader Trojan Removal Guide

Written by Wilbur Woodham
If you spectate the notification of Trojan:JS/Downloader detection, it appears that your system has a problem. All malicious programs are dangerous, without any exceptions. JS/Downloader is a virus that aims at opening your computer to further malware injection. Most of of the modern malware samples are complex, and can download other viruses. Getting the Trojan:JS/Downloader malware often equals to getting a thing which is able act like spyware or stealer, downloader, and a backdoor. Seeing this detection means that you must to perform the removal as fast as you can.
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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.
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Any malware exists with the only target – gain money on you1. And the developers of these things are not thinking about ethicality – they utilize all available ways. Stealing your private data, getting the comission for the advertisements you watch for them, utilizing your system to mine cryptocurrencies – that is not the complete list of what they do. Do you want to be a riding equine? That is a rhetorical question.

What does the pop-up with Trojan:JS/Downloader detection mean?

The Trojan:JS/Downloader detection you can see in the lower right corner is displayed to you by Microsoft Defender. That anti-malware program is pretty good at scanning, but prone to be mainly unstable. It is defenseless to malware attacks, it has a glitchy user interface and problematic malware clearing capabilities. Therefore, the pop-up which says about the JS/Downloader is just an alert that Defender has spotted it. To remove it, you will likely need to use a separate anti-malware program.

Trojan:JS/Downloader found

Microsoft Defender: “Trojan:JS/Downloader”

The exact Trojan:JS/Downloader infection is a really nasty thing. It digs into your Windows under the guise of something normal, or as a piece of the program you downloaded from a forum. Then, it makes everything to make your system weaker. At the end of this “party”, it injects other malicious things – ones which are wanted by cyber burglars who manage this virus. Hence, it is almost impossible to predict the effects from JS/Downloader actions. And the unpredictability is one of the most unwanted things when we are talking about malware. That’s why it is better not to choose at all, and don’t let the malware to complete its task.

Threat Summary:

Name JS/Downloader Trojan
Detection Trojan:JS/Downloader
Details JS/Downloader tool that looks legitimate but can take control of your computer.
Fix Tool See If Your System Has Been Affected by JS/Downloader Trojan

Is Trojan:JS/Downloader dangerous?

As I have stated previously, non-harmful malware does not exist. And Trojan:JS/Downloader is not an exception. This virus modifies the system configurations, edits the Group Policies and Windows registry. All of these elements are vital for correct system functioning, even in case when we are not talking about PC safety. Therefore, the virus which JS/Downloader carries, or which it will inject after some time, will try to get maximum revenue from you. Cybercriminals can steal your personal data, and then push it on the Darknet. Using adware and browser hijacker functions, embedded in Trojan:JS/Downloader virus, they can make money by showing you the ads. Each view gives them a penny, but 100 views per day = $1. 1000 victims who watch 100 banners per day – $1000. Easy math, but sad conclusions. It is a bad choice to be a donkey for crooks.

How did I get this virus?

It is difficult to line the origins of malware on your computer. Nowadays, things are mixed, and distribution methods used by adware 5 years ago may be used by spyware nowadays. However, if we abstract from the exact distribution method and will think about why it works, the reply will be really simple – low level of cybersecurity awareness. Individuals press on promotions on strange sites, click the pop-ups they get in their browsers, call the “Microsoft tech support” believing that the odd banner that states about malware is true. It is important to know what is legitimate – to prevent misunderstandings when trying to find out a virus.

Microsoft Tech Support Scam

Microsoft Tech Support Scam

Nowadays, there are two of the most extensive tactics of malware distribution – lure emails and injection into a hacked program. While the first one is not so easy to avoid – you need to know a lot to recognize a fake – the second one is simple to solve: just don’t use hacked programs. Torrent-trackers and other providers of “totally free” applications (which are, actually, paid, but with a disabled license checking) are really a giveaway point of malware. And Trojan:JS/Downloader is just within them.

How to remove the Trojan:JS/Downloader from my PC?

Trojan:JS/Downloader malware is incredibly difficult to eliminate manually. It puts its documents in numerous places throughout the disk, and can recover itself from one of the parts. In addition, a range of alterations in the registry, networking setups and also Group Policies are fairly hard to find and change to the original. It is far better to utilize a specific program – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for malware removal purposes.

Why GridinSoft Anti-Malware? It is pretty lightweight and has its detection databases updated almost every hour. Moreover, it does not have such problems and vulnerabilities as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware perfect for getting rid of 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 JS/Downloader the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
How to Remove Trojan:JS/Downloader Malware

Name: Trojan:JS/Downloader

Description: If you have seen a message showing the “Trojan:JS/Downloader found”, it seems that your system is in trouble. The JS/Downloader 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 Trojan:JS/Downloader 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: Trojan

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References

  1. Read about malware types on GridinSoft Threat encyclopedia.

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.

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