How to remove JS/Agent malware

What kind of malware is JS/Agent Trojan?

JS/Agent Trojan is a detection name for malicious JavaScript files. Typically, such files (malicious codes) are distributed by injecting them into legitimate websites. Computers get infected after a malicious (or legitimate but compromised) website is visited, and a malicious file is dropped.

JS/Agent Trojan in detail

Malicious JavaScript files (detected as JS/Agent Trojan) can open malicious websites and lead to downloading and executing other malicious files (injecting additional malware). Cybercriminals can use malicious JavaScript to distribute ransomware, cryptocurrency miners, Trojans, and other malware.

Another popular way to trick users into executing malicious JavaScript files is to attach them to emails. Typically, malicious email attachments are disguised as important/official documents (for example, invoices, bank statements, purchase orders, etc.).

Threat Summary:

Name	JS/Agent JavaScript Trojan
Threat Type	Trojan, password-stealing virus, banking malware, spyware.
Detection Names	Avast (JS:Downloader-FTX [Trj]), Combo Cleaner (Trojan.Iframe.KX), ESET-NOD32 (HTML/TrojanDownloader.IFrame), Kaspersky (Trojan-Downloader.HTML.IFrame.aje), Microsoft (Exploit:HTML/IframeRef.gen), Full List (VirusTotal)
Payload	Various malware
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.
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. ▼ Download Combo Cleaner To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

JS/Agent Trojan detection in general

JS/Agent Trojan is a detection name for JavaScript files of a malicious nature. Usually, they are found on compromised (but legitimate) websites. In addition to injecting malware, these JavaScripts can display various pop-up scams, perform tracking operations (track data).

How did malware infiltrate my computer?

When malicious JavaScript files/codes are injected into compromised websites, computers get infected after those pages are visited, and malicious files are dropped and executed. Also, cybercriminals use emails (attachments or files in emails), Trojans, cracked software download sites, and other unreliable sources for downloading files/programs or fake updaters to distribute malware.

In all cases, threat actors seek to trick users into executing malware by themselves. Typically, they use malicious MS Office, PDF or other documents, executables, archives, and other files (including JavaScript files). Examples of untrustworthy sources for downloading programs (or files) are P2P networks, third-party downloaders, free file hosting sites.

How to avoid installation of malware?

Do not trust irrelevant emails sent from suspicious addresses. Especially when such emails contain attachments or links. It is very common that emails of this kind are used to deliver malware. Avoid opening downloads from questionable sources. Use official pages and direct links as sources for downloading software and files.

Never use unofficial tools to update or activate software. Achieved it using tools/functions provided by the official software developers. If you believe that your computer is already infected, 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:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Quick menu:

• What is JS/Agent Trojan?
• STEP 1. Manual removal of JS/Agent malware.
• STEP 2. Check if your computer is clean.

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:

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:

Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

Restart 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.

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.

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.

Video showing how to start Windows 10 in "Safe Mode with Networking":

Extract the downloaded archive and run the Autoruns.exe file.

In 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.

Check 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".

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.

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.

Frequently Asked Questions (FAQ)

What are the biggest issues that malware can cause?

Data encryption, monetary loss, identity theft, invaded privacy. It depends on the type of malware.

What is the purpose of a malware?

In most cases, cybercriminals use malware to generate revenue. For example, they use information stealers to obtain sensitive data that would allow them to hijack banking or other accounts. Or they use ransomware to encrypt files and demand payment in return for a decryption tool. Also, malware is used to interrupt certain processes, disturb a company, etc.

How did a malware infiltrate my computer?

Usually, malware is distributed using various phishing and other social engineering techniques such as malicious emails (links and attachments), fake system warning messages, drive-by downloads, Peer-to-Peer networks, cracked software download websites. Certain types of malware can spread via the local network and removable storage devices.

Will Combo Cleaner protect me from malware?

Yes, Combo Cleaner will detect and eliminate malware from the infected computer. It is important to know that computers infected with high-end malware have to be scanned using a full scan. Otherwise, malware of this kind will remain undetected.

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