Today, a browser is one of the most essential programs on any computer that is connected to the Internet. It is not surprising that a lot of viruses have appeared that do not infect all programs in a row (as it was before), but hit them pointwise – into the browser! Moreover, often antiviruses are practically powerless: they do not 'see' the virus in the browser, although it can transfer you to various sites (sometimes to adult sites).
In this article I would like to consider what to do in such a situation when the antivirus 'does not see' the virus in the browser, in fact, how to remove this virus from the browser and clean the computer of various kinds of adware (ads and banners).
- 1) Question number 1 – is there a virus in the browser, how does the infection occur?
- 2) Remove virus from browser
- 3) Prevention and precautions against virus infection
1) Question number 1 – is there a virus in the browser, how does the infection occur?
To start such an article, it is logical to cite the symptoms of a browser infection with a virus (a virus means, among other things, adware modules, adware, etc.).
Usually, many users do not even pay attention to which sites they sometimes go to, which programs they install (and which checkboxes they agree with).
The most common symptoms of a browser infection are:
1. Advertising banners, teasers, a link with an offer to buy, sell, etc. Moreover, such advertising can appear even on those sites on which it has never happened before (for example, in contact; although there are already quite a few advertisements there …).
2. Requests to send SMS to short numbers, moreover, on the same popular sites (from which no one expects a dirty trick … Looking ahead, I will say that the virus replaces the real site address in the browser with a 'fake' one, which cannot be distinguished from the real one in appearance).
An example of a browser infection with a virus: under the guise of activating a Vkontakte account, attackers will write off money from your phone …
3. The appearance of various windows with a warning that in a few days you will be blocked; about the need to check and install a new flash player, the appearance of erotic pictures and videos, etc.
4. Opening arbitrary tabs and windows in the browser. Sometimes, such tabs open after a certain period of time and are not noticeable to the user. You will see this tab when you close or minimize the main browser window.
How, where and why did you get the virus?
Most often, a browser infection with a virus occurs through the fault of the user (I think in 98% of cases …). Moreover, the point is not even guilt, but a certain negligence, I would even say haste …
1. Installing programs via 'installers' and 'downloads' …
The most common reason for the appearance of adware on a computer is the installation of programs through a small installer file (it is an exe file, no more than 1 mb in size). Usually, such a file can be downloaded from various sites with software (less often on little-known torrents).
When you run such a file, you are offered to run or download the file of the program itself (and in addition, on your computer you will have five more different modules and add-ons …). By the way, if you pay attention to all the checkboxes when working with such 'installers', then in most cases you can remove the hated checkboxes …
Depositfiles – when downloading a file, if you do not uncheck the boxes, the Amigo browser and the start page from Mail.ru will be installed on the PC. Similarly, 'viruses' can be installed on your PC.
2. Installing programs with adware
Some programs may contain adware modules. When installing such programs, usually, you can uncheck the various browser add-ons that they offer to put. The main thing is not to press the button further, without familiarizing yourself with the installation parameters.
3. Visiting erotic sites, phishing sites, etc.
There is nothing to comment on here. I still recommend not to follow all sorts of dubious links (for example, coming in a letter to the mail from strangers, or in social networks).
4. Lack of antivirus and updates Windows
Antivirus is not 100% protection against all threats, but it still protects against most of it (with regular database updates). In addition, if you regularly update the OS itself Windows, then you will protect yourself from most of the 'problems'.
Best Antivirus Programs 2016: https://pcpro100.info/luchshie-antivirusyi-2016/
2) Remove virus from browser
In general, the required actions will depend on the virus that infected your program. Below I want to give a universal instruction on the steps, following which, you can get rid of most of the livestock of viruses. The actions are best performed in the order in which they are given in the article.
1) Full scan of your computer with antivirus
This is the very first thing I recommend doing. From advertising modules: toolbars, teasers, etc. antivirus is unlikely to help, and their presence (by the way) on a PC is an indicator that there may be other viruses on the computer.
Antivirus for Home for 2015 – an article with recommendations for choosing an antivirus.
2) Checking all add-ons in the browser
I recommend going to your browser add-ons and checking if there is anything suspicious there. The fact is that add-ons could have been installed without your knowledge. All add-ons that you do not need – delete!
Add-ons in firefox. To enter, press the key combination Ctrl + Shift + A, or click on the ALT button, and then go to the 'Tools -> Add-ons' tab.
Extensions and add-ons in the Google Chrome browser. To enter the settings, follow the link: chrome: // extensions /
Opera, extensions. To open a tab, press the Ctrl + Shift + A buttons. You can go through the 'Opera' -> 'Extensions' button.
3. Checking installed applications in Windows
As well as browser add-ons, some adware modules can be installed like regular applications. For example, the Webalta search engine once installed applications in the OS Windows, and to get rid of it, it was enough to uninstall this application.
4. Scanning your computer for malware, adware, etc.
As mentioned above in the article, antiviruses do not find all toolbars, teasers and other adware that are installed on a computer. Two utilities are best at this task: AdwCleaner and Malwarebytes . I recommend that you check your computer completely with both (they will clean up 95 percent of the infection, even the one that you don't even know about!).
Developer site: https://toolslib.net/downloads/viewdownload/1-adwcleaner/
The program will quickly scan your computer and neutralize all suspicious and malicious scripts, applications and other adware. By the way, thanks to it, you clean not only browsers (and it supports all popular ones: Firefox, Internet Explorer, Opera, etc.), but also clean the system registry, files, shortcuts, etc.
Developer site: https: //chistilka.com/
A simple and convenient program for cleaning the system from various garbage, spyware and malicious adware. Allows you to automatically clean browsers, file system and registry.
Developer site: http://www.malwarebytes.org/
An excellent program that allows you to quickly clean up all the 'garbage' from your computer. The computer can be scanned in various modes. For a full-fledged PC check, even the free version of the program and the quick scan mode are enough. Recommend!
5. Checking the hosts file
Many viruses change this file to their own and write the necessary lines in it. Because of this, when you go to some popular site, the fraudulent site is loaded on your computer (while you think it is a real site). Then, usually, a check occurs, for example, you are asked to send an SMS to a short number, or they put you on a subscription. As a result, the scammer received money from your phone, but you still had a virus on your PC …
It is located in the following path: C: \ Windows \ System32 \ drivers \ etc
You can restore the hosts file in different ways: using special. programs, using a regular notepad, etc. The easiest way to restore this file is using the AVZ antivirus program (you don't have to enable the display of hidden files, open the notepad under the administrator and other tricks …).
How to clear the hosts file in AVZ antivirus (in detail with pictures and comments): https://pcpro100.info/kak-ochistit-vosstanovit-fayl-hosts/
Cleaning the Hosts file in AVZ antivirus.
6. Checking browser shortcuts
If your browser goes to suspicious sites after you launch it, and antiviruses 'say' that everything is in order, it is possible that a 'malicious' command has been added to the browser shortcut. Therefore, I recommend removing the shortcut from the desktop and creating a new one.
To check the shortcut, go to its properties (the screenshot below shows the shortcut of the firefox browser).
Next, look at the complete startup line – 'Object'. The screenshot below shows the line as it should look if everything is in order.
Пример 'вирусной' строчки: 'C:\Documents and Settings\User\Application Data\Browsers\exe.emorhc.bat' 'http://2knl.org/?src=hp4&subid1=feb'
3) Prevention and precautions against virus infection
In order not to get infected with viruses – do not go to the Internet, do not change files, do not install programs, games …?
1. Install a modern antivirus on your computer and update it regularly. The time spent on updating the antivirus is less than what you waste on restoring your computer and files after a virus attack.
2. Update your OS Windows from time to time, especially for critical updates (even if you have disabled auto-update, which often slows down your PC).
3. Do not download programs from suspicious sites. For example, the WinAMP program (a popular music player) cannot be less than 1 mb in size (which means that you are going to download the program through the bootloader, which very often installs all sorts of 'garbage' into your browser). To download and install popular programs, it is better to use the official sites.
4. To remove all ads from the browser – I recommend installing AdGuard.
5. I recommend that you regularly check your computer (in addition to antivirus) using programs: AdwCleaner, Malwarebytes, AVZ (links to them above in the article).
That's all for today. Viruses will live as long as antiviruses !?