Trojan IRC/Backdor.SdBot4.FRV POP-UP Scam (Mac)

Also Known As: "Trojan IRC/Backdor.SdBot4.FRV" virus
Type: Mac Virus
Distribution: Moderate
Damage level: Medium

How to remove "Trojan IRC/Backdor.SdBot4.FRV" from Mac?

What is "Trojan IRC/Backdor.SdBot4.FRV"?

"Trojan IRC/Backdor.SdBot4.FRV" is a fake virus alert that appears when users visit a scam website. Scammers use the site to trick people into downloading an unwanted application called MacRepair that supposedly removes 'detected viruses'. We strongly recommend that you do not trust this scam. If the website was opened unintentionally, it is likely that this was done by a potentially unwanted application (PUA) installed on the system. PUAs usually cause unwanted redirects, deliver intrusive ads, and collect data.

Trojan IRC/Backdor.SdBot4.FRV scam

When opened, this scam website displays a pop-up window stating that it has detected a Trojan ("Trojan IRC/Backdoor.SdBot4.FRV") installed on the visitor's Mac computer. It encourages users to take immediate action to remove the Trojan. When this pop-up is closed, the scam page displays another pop-up that includes "security recommendations" for Mac computers. To ensure that no sensitive data (such as banking information, passwords, private files, etc.) is exposed, it suggests that users scan their Macs for viruses. It recommends that they use a Mac security utility (MacRepair), which can be downloaded by clicking the "Start Now" button. This software must be purchased to activate its features, however, we strongly advise that you do not trust apps promoted via deceptive websites .

This scam website, and other dubious pages, are often opened by PUAs that users have inadvertently installed on their browsers (or Mac computers). In addition to unwanted redirects, PUAs usually target users' data such URLs of visited websites, entered search queries, IP addresses, geolocations, and so on. Typically, PUAs target browsing-related data, however, they sometimes gather personal details. Furthermore, developers share the data with other parties (potentially, cyber criminals) who misuse it to generate revenue. PUAs also feed users with ads (coupons, banners, surveys, pop-up ads, and so on) that cause redirects to untrustworthy pages or trigger download/installation of other unwanted applications if they are clicked.

Threat Summary:
Name "Trojan IRC/Backdor.SdBot4.FRV" virus
Threat Type Mac malware, Mac virus.
Symptoms Your Mac becomes slower than normal, you see unwanted pop-up ads, you are redirected to dubious websites, you notice the presence of dubious apps.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers, torrent file downloads, potentially unwanted applications.
Damage Internet browsing tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites, loss of private information, installation of potentially unwanted applications, financial loss.
Removal

To eliminate Trojan IRC/Backdor.SdBot4.FRV virus our malware researchers recommend scanning your computer with Combo Cleaner.
▼ Download Combo Cleaner
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Combo Cleaner.

This scam (fake virus alert) is very similar to many other scams of this type such as "Your Mac Is Heavily Damaged! (33.2%)", "Virus Found Apple Message", and "Mac OS X Is Infected (4) By Viruses". Most of these scams encourage people believe that their computers are infected, have errors, and so on. Scammers use deceptive websites to trick people into downloading PUAs that supposedly fix/remove problems. In fact, none of these websites, or apps promoted on them, can be trusted.

How did potentially unwanted applications install on my computer?

Most users cause download and installation of PUAs inadvertently by clicking deceptive ads or when software developers use "bundling", a marketing method used by software developers who attempt to trick users into downloading/installing PUAs with other (usually free) software. They do not disclose information about the inclusion of unwanted apps in installation/download set-ups and hide them in "Custom"/"Advanced" options or settings. In many cases, users download/installation steps without checking available settings, thereby leading to unintentional download/installation of PUAs.

How to avoid installation of potentially unwanted applications?

Avoid downloading software from untrustworthy and unofficial websites, using third party software downloaders, Peer-to-Peer networks, and so on. Use direct links and official, trustworthy websites. Do not skip software download or installation steps without checking "Custom", "Advanced" and other similar settings or options. Opt-out of all additionally-included, unwanted apps and only then proceed to the next step or finish the download/installation procedure. Avoid clicking ads displayed on dubious pages. Typically, intrusive ads redirect to dubious and potentially malicious websites (such as gambling, pornography, adult dating, and so on). If you encounter these advertisements or redirects caused by them, check the list of installed applications (extensions, add-ons, plug-ins) on your browser and remove all unwanted entries immediately. Also check the list of installed programs on your computer (operating system). If your computer is already infected with PUAs, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate them.

Text presented in a pop-up window that appears when the scam website is visited:

IMMEDIATE ACTION REQUIRED

We have detected a trojan virus (Trojan IRC/Backdor.SdBot4.FRV) on your Mac.

Screenshot of a deceptive website (its pop-up window) encouraging visitors to download the MacRepair PUA:

deceptive website encouraging users to download MacRepair app

Text presented in this pop-up window:

Security Recommendation for Macs
Consider running a virus scan on your Mac.
Your system may be vulnerable after you visit risky websites.

Make sure that your sensitive data isn't exposed:
Secure your credit card details and banking information.
Protect your email password and other account passwords.
Safeguard your Facebook, Skype, AIM, and other chat logs.
Keep safe your private photos, family photos, and other files.
Ensure your webcam canít be accessed remotely.
We highly recommend using Mac security utility to detect and remove malware, adware, viruses, and suspicious apps.
How to Remove:
Step 1: Click the button below to download and install App.
Step 2: Run App and remove all potential viruses immediately.

Screenshot of the MacRepair installer:

MacRepair installer

Screenshot of the MacRepair application:

MacRepair application

Screenshot of MacRepair encouraging users to activate (purchase) it:

MacRepair app encourages user to purchase it

Instant automatic removal of Trojan IRC/Backdor.SdBot4.FRV virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of Trojan IRC/Backdor.SdBot4.FRV virus. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac 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 Combo Cleaner.

Quick menu:

Video showing how to remove potentially unwanted applications promoted via "Trojan IRC/Backdor.SdBot4.FRV" pop-up scam using Combo Cleaner:

Potentially unwanted applications removal:

Remove potentially unwanted applications from your "Applications" folder:

mac browser hijacker removal from applications folder

Click the Finder icon. In the Finder window, select "Applications". In the applications folder, look for "MPlayerX", "NicePlayer", or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove "trojan irc/backdor.sdbot4.frv" virus related files and folders:

Finder go to folder command

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

step1Check for adware-generated files in the /Library/LaunchAgents folder:

removing adware from launch agents folder step 1

In the Go to Folder... bar, type: /Library/LaunchAgents

removing adware from launch agents folder step 2
In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step2Check for adware generated files in the /Library/Application Support folder:

removing adware from application support folder step 1

In the Go to Folder... bar, type: /Library/Application Support

removing adware from application support folder step 2
In the “Application Support” folder, look for any recently-added suspicious folders. For example, “MplayerX” or “NicePlayer”, and move these folders to the Trash.

step3Check for adware-generated files in the ~/Library/LaunchAgents folder:

removing adware from ~launch agents folder step 1


In the Go to Folder bar, type: ~/Library/LaunchAgents

removing adware from ~launch agents folder step 2

In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step4Check for adware-generated files in the /Library/LaunchDaemons folder:

removing adware from launch daemons folder step 1
In the Go to Folder... bar, type: /Library/LaunchDaemons

removing adware from launch daemons folder step 2
In the “LaunchDaemons” folder, look for recently-added suspicious files. For example “com.aoudad.net-preferences.plist”, “com.myppes.net-preferences.plist”, "com.kuklorest.net-preferences.plist”, “com.avickUpd.plist”, etc., and move them to the Trash.

step 5 Scan your Mac with Combo Cleaner:

If you have followed all the steps in the correct order you Mac should be clean of infections. To be sure your system is not infected run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file double click combocleaner.dmg installer, in the opened window drag and drop Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates it's virus definition database and click "Start Combo Scan" button.

scan-with-combo-cleaner-1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide, otherwise it's recommended to remove any found infections before continuing.

scan-with-combo-cleaner-2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

"Trojan IRC/Backdor.SdBot4.FRV" virus removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove "trojan irc/backdor.sdbot4.frv" virus related Safari extensions:

safari browser preferences

Open Safari browser, from the menu bar, select "Safari" and click "Preferences...".

safari extensions window

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

firefox browser iconRemove malicious plug-ins from Mozilla Firefox:

Remove "trojan irc/backdor.sdbot4.frv" virus related Mozilla Firefox add-ons:

accessing mozilla firefox add-ons

Open your Mozilla Firefox browser. At the top right corner of the screen, click the "Open Menu" (three horizontal lines) button. From the opened menu, choose "Add-ons".

removing malicious add-ons from mozilla firefox

Choose the "Extensions" tab and look for any recently-installed suspicious add-ons. When located, click the "Remove" button next to it/them. Note that you can safely uninstall all extensions from your Mozilla Firefox browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

chrome-browser-iconRemove malicious extensions from Google Chrome:

Remove "trojan irc/backdor.sdbot4.frv" virus related Google Chrome add-ons:

removing malicious google chrome extensions step 1

Open Google Chrome and click the "Chrome menu" (three horizontal lines) button located in the top-right corner of the browser window. From the drop-down menu, choose "More Tools" and select "Extensions".

removing malicious Google Chrome extensions step 2

In the "Extensions" window, look for any recently-installed suspicious add-ons. When located, click the "Trash" button next to it/them. Note that you can safely uninstall all extensions from your Google Chrome browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

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 virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
Trojan IRC/Backdor.SdBot4.FRV 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 "Trojan IRC/Backdor.SdBot4.FRV" virus on your mobile device.
We Recommend:

Get rid of Trojan IRC/Backdor.SdBot4.FRV virus today:

▼ REMOVE IT NOW with Combo Cleaner for Mac

Platform: macOS

Editors' Rating for Combo Cleaner:
Editors ratingOutstanding!

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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Combo Cleaner.