How to check the installation file for viruses. How to check a file for viruses

In this article I will describe how to check a file for viruses online using dozens of antivirus programs at once.

We all exchange, download files from the Internet, receive them by mail, instant messenger, via flash drives, etc.. Sometimes, not every antivirus can find, react and neutralize the presence of potentially dangerous software in time. This often happens with free or little-known products. Therefore, I recommend checking the antivirus for functionality immediately after installation. And only then begin the scanning procedure.

But what if the security software in this moment is not available or, for example, the license has expired, etc., but it is necessary check the file for viruses without delay. There is an exit!

How to check a file for viruses online

Metascan Online

Don’t be afraid that this online service is in English, everything here is intuitive. In addition to our main task, here you can:

Look Up a Hash— look at the hash (hashing algorithms) MD5/SHA1/SHA256.
AND scan IP address

To check the file for viruses online we need to select the first tab “Analyze a file”, then click on the “Select a file” button.

Select the desired document/archive/picture, etc. on your computer and wait a while while the scanning takes place. Upon completion, a report on the research conducted will be provided.

In the light green mug we are “told” that no dangerous elements were detected (0/40).

First uploaded and Last scanned - time, day and month when the first and last scan was performed
Filetype - file type (in my case it's gif)
File size - size
MD5 - 128-bit hashing algorithm
SHA1 - cryptographic hashing algorithm
SHA256 - secure hashing algorithm

Below we see a report for each of the 40 antiviruses in which tracking was performed.

Worth paying attention! The size of the file being checked should not exceed 140 MB; if it is located in an archive, the archive should not be password protected. And of course, you shouldn’t relate to this service, as the only source of checks. Your computer must have a good antivirus program.

VirusTotal

Another, now Russian-language resource that will help check file for viruses online, and everything else, any link or site for the presence of dangerous software. And also find out information by domain, IP address and hash.

We will receive a report after some time.

If you use in your work Google browser Chome, I strongly recommend installing the VirusTotal extensions, this will make analysis much faster and more convenient. This is a plugin for Mozilla VTzilla, and Opera. — VirusTotal Extension.

There is also specialized program for PC - VirusTotal Windows Uploader. You can download it. Its tasks include checking files and analyzing suspicious Windows processes 10.

In the first case, click on the button “ Select file(s) and upload“, we find the archive, program, etc..

And on the portal page that opens, we look at the information received.

In the second case, the operating principle is as follows. At the top of the application, mark the suspicious process and then click on the “ Upload process executable«.

Checking a file for viruses online

Of course, today there is a large number of antivirus programs for protection personal computer from viruses. And it is quite difficult for an inexperienced person to understand which antivirus program is better. It is much better and more correct to turn to professionals, find out the opinions of advanced users and take care of them in advance antivirus protection home computer.

How to check a file for viruses online?

And in this article I want to introduce our readers to special online services. These are sites that allow the user to check files and website pages for free hidden viruses, without installing an antivirus program on your computer. Such online antiviruses are absolutely free and you can check any number of files with these online services.

Pros and cons of online antiviruses

Pros:

The most reliable check of a file for the presence of malware is achieved due to the fact that the file is uploaded to a website where it is checked for viruses using signature databases different antiviruses. The chances of identifying a virus or other virus are greater than that of an antivirus installed on a PC.
Online antivirus does not require installation on your computer.
There is no need to first download the file to your computer and then upload it to the online antivirus website. Some services (for example Virustotal) make it possible to remotely check a file.
Checking the site for viruses.
Almost all online antiviruses are free.

Minuses:

Internet connection required.
Access to sites online services may be blocked by a virus (for an advanced user this is not a problem)

There are many more pros than cons. The biggest disadvantage of using such services will be for virus writers, poets and other distributors of “good”. So, after such a check, the file will, as they say in hacker jargon, be scorched by all antiviruses.

So, I bring to your attention an overview of the six best online file scanning services for viruses.

Regarding viruses and antivirus software designed to combat them, quite a lot has been written on this topic. You can check a file for viruses quite simply if you know the main points related to the effect of viruses and the principles of operation of anti-virus software. software products. Let's look at the situation with checking files for viruses in a little more detail.

Viruses and their effects

The emergence of viruses is associated with the emergence of the first Windows operating systems, in the runtime environment of which these malware felt like a fish in water. Moreover, over time, not only the OS, but also the viruses themselves have undergone very strong changes.

If previously their action was reduced mainly to failure computer system, then a little later these pests began to destroy user and system files(remember the notorious I Love You virus, which came to email in the form of a love letter or message).

Today the range is very, very wide. It contains computer worms, keyloggers, and indeed any malicious codes or executable macros. Please note: if at the dawn of their occurrence viruses, as a rule, were represented by executable files.exe, then later they began to disguise themselves as, say, dynamic libraries.dll, music in .mp3 format, or even ordinary text files with extension .txt. Moreover, many viruses now do not look like separate program, but are embedded, for example, in documents Microsoft Office, so opening such a document can entail the most negative consequences associated not only with “crash” operating system, but also with the seizure of computer control or theft of data.

Antivirus programs

If you are wondering how to check a file for viruses, the answer is the simplest: use anti-virus software. In modern computer world this method is the most effective, given that almost every day great amount new malware.

If we consider everything in general outline, then we can say that any of them can check a file for viruses, since they all work on the same principle, although they use different methods checks.

Naturally, it is better to choose ones that have the maximum functionality plus “proactive” protection. IN in this case checking a file for viruses will be very simple, because signature, heuristic and behavioral analysis will be used, and in some cases comparison checksums(although many believe that this method is outdated). But in total, you can get almost 100 percent results.

Ways to check files

Naturally, each testing method has its own positive sides and disadvantages associated with the functional set of antiviruses or online services themselves. As they say, it all depends on the software developer or Internet resource.

Scanning with antivirus

As for use, checking a file for viruses is quite simple. The fact is that almost everything well-known antiviruses after installation they are integrated into context menu file managers and create their own teams in it quick access to one action or another. Thus, there is no need to call the antivirus manually.

For example, when using software Kaspersky package Kaspersky Antivirus itself can check a file for viruses when you call the “Check for viruses” command, provided that the program has a Russian version. This command is available in the drop-down menu that appears after right-clicking on the file that needs to be checked.

Actually, the same Eset NOD32 works in a similar way. Only the name of the command being called changes. In this case it is called “Scan Eset program NOD32" (or Eset Smart Security).

The question of how to check a file or website for viruses can also be resolved by calling such scanners manually. For example, in the NOD32 application in the “Service” menu there is special team“Send file for analysis.” When using this item, you will need to indicate the address of your Email and attach a dubious file, after which it will be sent for analysis to the laboratory of this IT corporation. This is where we come close to solving the problem of how to check a file for viruses using specialized Internet resources.

Online check

There are quite a lot of services for online scanning of files for viruses. Almost all antivirus software manufacturers create them. You can use anything: Kaspersky Lab resources, Eset company, Dr.Web, Norton, etc.

For example, one of the simplest and popular services is Virus Total. To use it, simply go to the official website, attach the file you are looking for or a URL link to an Internet resource (or a link to a file contained on the page) in the appropriate field and click the “Check” button. Actually, this is how the problem of how to check website files for viruses is solved, not to mention checking files stored on the local computer terminal. However, there is a small snag here. The fact is that on the verification site itself there is a limit on the size of the files being checked, which is 64 MB (previously - 32 MB).

Bottom line

To summarize, it can be noted that everything the above methods good. However, if you need to scan a file or files stored on a hard drive or removable drive for viruses, it is better to use anti-virus software that is installed on your computer. To check online resources or files on websites, it is better to use online checking. This will ensure that the selected source is safe before visiting the resource itself or downloading information from it.

Infection when visiting sites from mobile devices

Some sites on the Internet have been hacked by attackers targeting mobile device users. By visiting such a site from a computer, you will be taken to a harmless Internet resource, but by accessing it from a smartphone, you will secretly redirected to a site with an unpleasant “surprise”. Using hacked websites, attackers can distribute various malicious programs, the most “popular” of which are various modifications. The victim’s losses depend on what family of Trojans infiltrate your mobile device, i.e., on its malicious load. Read more about this phenomenon in our news.

Attention mobile device users!

Set to mobile device Dr.Web antivirus for Android with component URL filter. Cloud filter will restrict access to inappropriate and potentially dangerous sites in several categories - this is especially important for protecting your children from inappropriate Internet content.

URL filter present only in the full-featured version of Dr.Web for Android (it is not in Dr.Web for Android Light). For buyers of Dr.Web Security Space and Dr.Web Anti-virus, use of Dr.Web for Android - for free.

Attention PC and laptop users!

Install Dr.Web Link Checker

This free extensions to check Internet pages and files downloaded from the Internet. Install the extension to your browser and surf World Wide Web without fear virus attack!

Download Dr.Web Link Checker for free for


	Opera

Using the Dr.Web online file scanner, you can check files that you suspect for free for viruses and malware.

You send your files using your browser, they are uploaded to our server, checked by ourselves latest version Dr.Web with full set additions virus base, and you get the result of the check.

How to scan a file or several files with Dr.Web Anti-virus online?

To check 1 file: click on the “Browse..” button and select the file suspicious. Click the "Check" button to start scanning.
Maximum size file - 10 MB.
To check multiple files: place the files in an archive (WinZip, WinRar or ARJ format) and download this archive by clicking on the “Browse” button. and then click on the “Check” button. The verification protocol will include a report on each file in the archive.

IMPORTANT! Antivirus scanner Dr.Web will help you determine whether the file(s) you provided for scanning are infected or not, but will not answer your question whether your computer is infected. For full check hard drives And system memory use our free healing utility CureIt! .

You can also check local network via centrally managed network utility Dr.Web CureNet!

Send a suspicious file

Infection when visiting sites from mobile devices

Attention mobile device users!

Install Dr.Web antivirus for Android on your mobile device with the component URL filter. Cloud filter will restrict access to inappropriate and potentially dangerous sites in several categories - this is especially important for protecting your children from inappropriate Internet content.

Attention PC and laptop users!

Install Dr.Web Link Checker

These are free extensions for checking Internet pages and files downloaded from the Internet. Install the extension to your browser and surf the World Wide Web without fear of a virus attack!

Download Dr.Web Link Checker for free for


	Opera

Using the Dr.Web online file scanner, you can check files that you suspect for free for viruses and malware.

You send your files using your browser, they are uploaded to our server, scanned by the latest version of Dr.Web with a full set of virus database additions, and you receive the scan result.

How to scan a file or several files with Dr.Web Anti-virus online?

To check 1 file: click on the “Browse..” button and select the file that is suspicious. Click the "Check" button to start scanning.
The maximum file size is 10 MB.
To check multiple files: place the files in an archive (WinZip, WinRar or ARJ format) and download this archive by clicking on the “Browse” button. and then click on the “Check” button. The verification protocol will include a report on each file in the archive.

IMPORTANT! The Dr.Web anti-virus scanner will help you determine whether the file(s) you provided for scanning are infected or not, but will not answer your question whether your computer is infected. For a complete scan of your hard drives and system memory, use our free healing utility CureIt! .

You can also check your local network using the centrally managed network utility Dr.Web CureNet!

Send a suspicious file