How to remove Whisper Stealer from the operating system

Also Known As: Whisper information stealer
Type: Trojan
Damage level: Severe

What is Whisper Stealer?

Whisper Stealer is an information stealer targeting Chromium and Gecko browsers, cryptocurrency wallets, Discord tokens, and Telegram sessions (and other data). It is promoted (and sold) on hacker forums.

There are five available subscription plans: 250 rubles for one month, 600 rubles for three months, 1000 rubles for six months, 1650 rubles for a year, and 3000 rubles for the lifetime subscription.

Whisper Stealer malware

More about Whisper Stealer

Whisper Stealer steals passwords, cookies, autofill data, and credit card details from Chromium browsers. It also steals the same information (excluding credit card details) from Gecko browsers. Moreover, it can extract data from more than thirty crypto wallets and collect Discord tokens and Telegram sessions.

Whisper Stealer operates as an in-memory stealer - it resides only in memory, which means that it can remain undetected. Also, it can avoid being tested on virtual machines. Cybercriminals can use Whisper Stealer to steal identities, personal accounts (including crypto wallets, banking accounts, Discord, and Telegram accounts), and more.

Stolen accounts could be used to make fraudulent purchases and transactions, deliver malware, send spam, and other purposes. Computers infected with the Whisper Stealer malware should be scanned with antivirus software as soon as possible.

Threat Summary:
Name Whisper information stealer
Threat Type Trojan, password-stealing virus, banking malware
Detection Names Avast (Win32:SpywareX-gen [Trj]), Combo Cleaner (IL:Trojan.MSILZilla.11636), ESET-NOD32 (A Variant Of MSIL/Spy.Agent.AES), Kaspersky (HEUR:Trojan-PSW.MSIL.Stealer.gen), Microsoft (Trojan:Win32/Mamson.A!ac), Full List (VirusTotal)
Symptoms Whisper Stealer stealthily infiltrates the victim's computer and remains 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 passwords, banking information (and other sensitive data), hijacked Telegram and Discord accounts, identity theft.
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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Information stealers in general

Typically, cybercriminals use information stealers to obtain passwords, credit card details, and other information that could be used to hijack various accounts, steal identities, make monetary transactions, etc. More examples of information stealers are ColdStealer, FFDroider, MetaStealer.

How did Whisper Stealer infiltrate my computer?

Most threat actors distribute malware via emails, Trojans (another type of malware), fake software updating tools, cracked software download pages, or other unreliable sources for downloading files/programs. Their goal is to trick users into executing malware by themselves.

Emails used to trick recipients into infecting computers contain malicious attachments or links. In most cases, cybercriminals behind such emails pretend to be legitimate organizations, companies, etc. Files that most threat actors use to distribute malware are executables, archives (like ZIP, RAR), JavaScript files, Microsoft Office, and PDF documents.

Examples of untrustworthy sources for downloading software (or files) that can be used to distribute malicious software are Peer-to-Peer networks, freeware download websites, free file hosting websites, and third-party downloaders.

How to avoid installation of malware?

Do not trust irrelevant emails sent from suspicious addresses, especially when they contain links or attachments. Emails of this kind usually are used to deliver malware. Download files and software from trustworthy sources (official pages, platforms). Avoid opening downloads from other sources.

Keep the operating system and installed programs up to date. Update (and activate) them using tools provided by their official developers. Keep your computer protected with reputable antivirus software. 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.

Appearance of the hacker forum used to promote Whisper Stealer (GIF):

whisper stealer malware promoted on hacker forum

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.

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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 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:

Malware process running in the Task Manager

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 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

Autoruns application appearance

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.

Run Windows 7 or Windows XP in 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.

Run Windows 8 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.

Run Windows 10 in 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 archive and run Autoruns.exe application

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.

Refresh Autoruns application results

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".

Delete malware in Autoruns

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.

Search for malware and delete 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)

My computer is infected with Whisper Stealer malware, should I format my storage device to get rid of it?

No, malware like Whisper Stealer can be removed without formatting the storage device. Our malware removal guide is provided above.

What are the biggest issues that malware can cause?

Malware can encrypt files, steal sensitive information, add a computer to a botnet, mine cryptocurrency using the installed hardware, infect a computer with other malware, and more. It depends on the type of malware a computer is infected with.

What is the purpose of Whisper Stealer?

Whisper Stealer is an information stealer capable of gathering passwords, cookies, autofill data, and credit card details from Chrome and Gecko browsers. Also, it can steal data from cryptocurrency wallets, Telegram sessions, and Discord data.

How did a malware infiltrate my computer?

Typically, computers get infected through emails (attachments or links in emails), drive-by downloads, cracked software websites, and other unreliable sources for downloading files/programs. In some cases, threat actors use fake software updating tools to distribute malware.

Will Combo Cleaner protect me from malware?

Yes, Combo Cleaner will scan your computer and remove detected malware. It can detect almost all known malware. It is important to know that high-end malware usually hides deep in the system. Therefore, infected computers must be scanned using a full scan option.

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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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