How to uninstall Cryxos from a computer?

Also Known As: Cryxos virus
Distribution: Low
Damage level: Medium

Cryxos Trojan removal instructions

What is Cryxos Trojan?

Cryxos trojans are designed to display deceptive alerts/notifications on compromised or malicious websites claiming that user's computer is infected with a virus (or viruses), it is blocked and/or some of the user's personal details are stolen. In most cases users are encouraged to solve the problem by calling scammers via the provided phone number. As a rule, Cryxos trojans display messages that are disguised as legitimate notifications from Microsoft. However, this company has nothing to do with these technical support scams. We strongly recommend not to trust them and remove Cryxos from the operating system as soon as possible.

Cryxos Trojan scam

In most cases Cryxos trojans display virus, error alerts when users open various malicious or compromised websites that are injected with a malicious JavaScript file. That script displays various notifications disguised as legitimate messages from Microsoft or Windows operating system. Typically, those messages claim that user's operating system is infected with a virus (or multiple viruses) and encourage to call certain number for technical support. Quite often those messages claim that user's computer is blocked and/or that some personal information (e.g., banking-related details) is being stolen too. In some cases Cryxos trojans play an audio recording repeating the same message that is displayed in the alert notifications as well. Either way, all those notifications are fake and should never be trusted. As a rule, scammers seek to trick users into believing that they have to solve the occurred problem (remove viruses, fix errors, etc.) by calling the provided number as soon as possible. Typically, scammers try to extract money from unsuspecting visitors either by encouraging them to use their online technical services or purchase some software. Basically, they try to trick users into paying money for their "assistance". It is worth mentioning that sometimes scammers ask users to give them a remote access to their computer as well. By giving them such access users would allow scammers to take a full control over their computers. It means that scammers could be able to access personal information, files or even infect systems with some malicious software like ransomware.

Threat Summary:
Name Cryxos virus
Threat Type Phishing, Scam, Social Engineering, Fraud
Fake Claim Typically, tech support scams claim that user's computer is infected, blocked, and/or some personal information is being stolen.
Symptoms Fake error messages, fake system warnings, pop-up errors, hoax computer scan.
Distribution methods Compromised websites, rogue online pop-up ads, potentially unwanted applications.
Damage Loss of sensitive private information, monetary loss, identity theft, possible malware infections.
Removal

To eliminate Cryxos virus our malware researchers recommend scanning your computer with Spyhunter.
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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Here are examples of some tech support scams: "This is a VIRUS. You computer is blocked", "Activation Error 0xC004FC03" and "CRITICAL_PROCESS_DIED". What all these scams have in common is that they are designed to trick users into believing that they need to contact (typically, call) scammers and use their services and/or software as soon as possible. Scammers behind these scams attempt to generate revenue by deceiving users into paying money for supposedly legitimate services and/or software. As a rule, people do not visit websites that display these fake virus alert, error and other similar notifications intentionally. In most cases those pages get opened through other untrustworthy pages, deceptive advertisements and/or potentially unwanted applications (PUAs) that are installed on browsers and/or operating systems.

How did potentially unwanted applications install on my computer?

Very often developers distribute various potentially unwanted apps by including them in download and/or installation setups of other programs. This distribution method is called "bundling". Typically, information about additional downloads and/or installations can be found in "Custom", "Advanced" and other settings of setups. Nevertheless, not all people check (and change) them. It means that they agree with offers to download and/or install all additionally included software (PUAs). Also, unwanted downloads and/or installation can be caused by clicking deceptive ads that are designed to execute certain scripts. However, it happens only when people click those ads. In most cases they are displayed on various untrustworthy websites.

How to avoid installation of potentially unwanted applications?

We recommend to download everything (files, programs) from official and trustworthy websites and via direct download links. Other channels, tools like third party downloaders, Peer-to-Peer networks (e.g., eMule, torrent clients), unofficial websites, etc., should not be uses. If a download and/or installation a setup contains "Custom", "Advanced" and other similar settings, then they should not be left unchecked. It is important to decline offers to download and/or install unwanted apps before completing downloads and installations. Also, it is not safe to click ads that are being shown on shady pages. They either open other pages of this kind or cause downloads, installations of some unwanted software. To stop a browser from opening shady pages and/or displaying ads we recommend to remove all unwanted add-ons, plug-ins or extensions from it and programs of this kind from the operating system. If your computer is already infected with PUAs, we recommend running a scan with Spyhunter for Windows to automatically eliminate them.

Screenshot of a tech support scam ("CRITICAL_PROCESS_DIED"):

example of a tech support scam

Text in this scam:

Windows Security
    Microsoft Edge
    The server ****** is asking for your user name and password.

    That server also reports:
    "__________
    System_Protect_-_PROTECT_ERROR_0xEB6468728
    Contact_Microsoft_Support__+1_(855)_723-3755_Toll-Free.
    __________".

Microsoft Edge

    Stop code: CRITICAL_PROCESS_DIED | Error Report
    Security system has detected the threatening attempt to gain access to your bank logins and related data, but this dangerous connection was blocked with Firewall and further data leak was prevented.
    We strongly recommend you to perform temporary block of all your accounts, and take some necessary security measures.
    Despite the timely blocking of the connection, there is still a serious threat of private data stealth.
    Please don t wait to respond, every minute is important!
    There is possibility that virus already hurt your disks or destroyed and stole its data.
    It is reason for checking current system security and verifying its stability.
    Do not spend your time and immediately call us or contact our service center support team.
    ------------
    Contact Microsoft Support:
    +1 (855) 723-3755
    ------------
    We are waiting for your rapid responce to help you
    Please contact our administration to solve this issue.
    Call Help Desk:
    +1 (855) 723-3755

 Screenshot of another tech support scam ("This is a VIRUS. You computer is blocked"):

example of a tech suppport scam

Text in this scam:

VIRUS ALERT FROM MICROSOFT
This computer is BLOCKED
Do not close this window and restart your computer
Your computer's registration key is Blocked.
Why we blocked your computer?
The window's registration key is illegal.
This window is using pirated software.
This window is sending virus over the internet.
This window is hacked or used from undefined location.
We block this computer for your security.
Contact microsoft helpline to reactivate your computer.

Microsoft Security Tollfree:
+1-800-278-6064
 Prevent this page from creating additional dialogues.
Windows Support Alert
Your System Detected Some Unusual Activity.
It might harm your computer data and track your financial activities.
Please report this activity to +1-800-278-6064
Ignore Alert Chat Now
Enter Windows registration key to unblock.
ENTER KEY:

Screenshot of another tech support scam ("VIRAL ALARM OF MICROSOFT"):

example of a tech support scam

Text in this scam:

VIRAL ALARM OF MICROSOFT
***This computer is BLOCKED***
Do not close this window and restart your computer
The registry key on your computer is Blocked.
Why did we block your computer?
The registry key of the window is illegal.
This window uses pirated software.
This window sends virus over the internet.
This window is hacked or used from undefined location.
We block this computer for your safety.
Contact Windows helpline to wake up your computer.
Enter Windows registration key to unlock or call
+1-833-272-0272(Toll-free)
ENTER KEY:

Windows Support alarm
Your System Has Discovered An Unusual Activity.
It could harm your computer data and your financial activities.
Please report this activity an +1-833-272-0272
Ignore warning
Chat Well

One more example of a tech support scam ("Windows Detected ALUREON Attack"):

example of a tech support scam

Text in this scam:

Windows Detected ALUREON Attack, The infections detected, indicate some recent downloads on the computer which in turn has created problems on the computer. Call Toll Free 1-844-919-5111 and share this code SD333 to the Agent to Fix This.

Instant automatic removal of Cryxos virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Cryxos virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Removal of potentially unwanted applications:

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

Windows XP users:

Accessing Add or Remove Programs in Windows XP

Click Start, choose Settings and click Control Panel. Locate and click Add or Remove Programs.

Windows 10 and Windows 8 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Mac OSX users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

PUAs uninstall via Control Panel

In the uninstall programs window, look for any suspicious/recently-installed applications, select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted application, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove rogue extensions from Internet browsers:

Video showing how to remove potentially unwanted browser add-ons:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing rogue extensions from Internet Explorer step 1

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".

Removing rogue extensions from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the cryxos virus, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing rogue extensions from Google Chrome step 1

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons and remove them.

Removing rogue extensions from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the cryxos virus, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Removing rogue extensions from Mozilla Firefox step 1

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click on "Extensions", in the opened window remove all recently-installed suspicious browser plug-ins.

Removing rogue extensions from Mozilla Firefox step 2

Optional method:

Computer users who have problems with cryxos virus removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

removing adware from safari step 1 - accessing preferences

Make sure your Safari browser is active, click Safari menu, and select Preferences....

removing adware from safari step 2 - removing extensions

In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing adware from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.

Removing adware from Microsoft Edge step 2

Optional method:

If you continue to have problems with removal of the cryxos virus, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

declining installation of adware while downloading free software sampleCommonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.

Removal assistance:
If you are experiencing problems while trying to remove cryxos virus from your computer, please ask for assistance in our malware support forum.

Post a comment:
If you have additional information on cryxos virus or it's removal please share your knowledge in the comments section below.

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.

QR Code
Cryxos virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Cryxos virus on your mobile device.
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Platform: Windows

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