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Real-World Protection Test March-June 2012

Date June 2012
Language English
Last Revision July 16th 2012

Release date 2012-07-17
Revision date 2012-07-16
Test Period March - June 2012
Number of Testcases 2159
Online with cloud connectivity checkbox-checked
Update allowed checkbox-checked
False Alarm Test included checkbox-checked
Platform/OS Microsoft Windows
Methodology Click here


Malicious software poses an ever-increasing threat, not only due to the number of malware programs increasing, but also due to the nature of the threats. Infection vectors are changing from simple file-based methods to distribution via the Internet. Malware is increasingly focussing on users, e.g. by deceiving them into visiting infected web pages, installing rogue/malicious software or opening emails with malicious attachments.

The scope of protection offered by antivirus programs is extended by the inclusion of e.g. URL-blockers, content filtering, reputation systems and user-friendly behaviour-blockers. If these features are perfectly coordinated with the signature-based and heuristic detection, the protection provided against threats increases.

In this test, all protection features of the product can be used to prevent infection – not just signatures or heuristic file scanning. A suite can step in at any stage of the process – accessing the URL, downloading the file, formation of the file on the local hard drive, file access and file execution – to protect the PC. This means that the test achieves the most realistic way of determining how well the security product protects the PC. Because all of a suite’s components can be used to protect the PC, it is possible for a product to score well in the test by having e.g. very good behavioural protection, but a weak URL blocker. However, we would recommend that all parts of a product should be as effective as possible. It should be borne in mind that not all malware enters computer systems via the Internet, and that e.g. a URL blocker is ineffective against malware introduced to a PC via a USB flash drive or over the local area network.

In spite of these new technologies, it remains very important that the signature-based and heuristic detection abilities of antivirus programs continue to be tested. Even with all the protection features available, the growing frequency of zero-day attacks means that some computers will inevitably become infected. As signatures can be updated, they provide the opportunity to recognize and remove malware which was initially missed by the security software. The newer, “non-conventional” protection technologies often offer no means of checking existing data stores for already-infected files, which can be found on the file servers of many companies. Those new security layers should be understood as an addition to good detection rates, not as a replacement.

The Whole-Product Dynamic “Real-World” Protection test is a joint project of AV-Comparatives and the University of Innsbruck’s Faculty of Computer Science and Quality Engineering. It is partially funded by the Republic of Austria.

For this test, we normally use the Internet security suite, as any protection features that prevent the system from being compromised can be used. However, a vendor can choose to enter their basic antivirus product instead, if they prefer. The main versions of the products tested in each monthly test run are shown below:

Tested Products

Test Procedure

Testing dozens of antivirus products with hundreds of URLs each per day is a great deal of work, which cannot be done manually (as it would involve visiting thousands of websites in parallel), so it is necessary to use some sort of automation.

Lab Setup

Every security program to be tested is installed on its own test computer. All computers are connected to the Internet (details below). The system is frozen, with the operating system and security program installed. The entire test is performed on real workstations. We do not use any kind of virtualization. Each workstation has its own internet connection with its own external IP. We have special agreements with several providers (failover clustering and no traffic blocking) to ensure a stable internet connection. The tests are performed using a live internet connection. We took the necessary precautions (with specially configured firewalls, etc.) not to harm other computers (i.e. not to cause outbreaks).

Hardware and Software

For this test we used identical workstations, a control and command server and network attached storage.

  Vendor Type CPU RAM Hard Disk
Workstations Dell Optiplex 755 Intel Core 2 Duo 4 GB 80 GB
Control Server Dell Optiplex 755 Intel Core 2 Duo 4 GB 2 x 500 GB
Storage Eurostor ES8700-Open-E Dual Xenon 32 GB 140 TB Raid 6

The tests are performed under Windows XP SP3 with updates of 1st March 2012. Some further installed vulnerable software includes:

Vendor Product Version   Vendor Product Version
Adobe Flash Player ActiveX 10.1 Microsoft Office Home 2003
Adobe Flash Player Plug-In 10.0 Microsoft .NET Framework 4.0
Adobe Acrobat Reader 8.0 Mozilla Firefox 9.0.1
Apple QuickTime 7.1 Sun Java 6.0.140
Microsoft Internet Explorer 7.0 VideoLAN VLC Media Player 1.1.11

Initially we planned to test this year with a fully updated/patched system, but we had to switch back using older/vulnerable/unpatched OS and software versions due to lack of enough exploits in-the-field to test against. This should remind users to keep their systems and applications always up-to-date, in order to minimize the risk of getting infected through exploits using unpatched software vulnerabilities.


We use every security suite with its default (out-of-the-box) settings. Our whole-product dynamic protection test aims to simulate real-world conditions as experienced every day by users. If user interactions are required, we choose allow. If the system will be protected anyway, we count it as blocked even if there was first a user interaction. If the system gets compromised, we count it as user-dependent. We consider “protection” to mean that the system is not compromised. This means that the malware is not running (or is removed/terminated) and there are no significant/malicious system changes. An out-bound-firewall alert about a running malware process, which asks whether or not to block traffic form the users’ workstation to the internet is too little, too late and not considered by us to be protection.

Preparation for every testing day

Every morning, any available security software updates are downloaded and installed, and a new base image is made for that day. This ensures that even in the case the security product would not finish a bigger update during the day (products are being updated before each test case) or is not reachable, it would at least use the updates of the morning, as it would happen to the user in the real world.

Testing Cycle for each malicious URL

Before browsing to each new malicious URL we update the programs/signatures (as described above). New major product versions (i.e. the first digit of the build number is different) are installed once at the beginning of the month, which is why in each monthly report we only give the main product version number. Our test software monitors the PC, so that any changes made by the malware will be recorded. Furthermore, the recognition algorithms check whether the antivirus program detects the malware. After each test case the machine is reset to its clean state.


Security products should protect the user’s PC. It is not very important at which stage the protection takes place. This can either be while browsing to the website (e.g. protection through URL Blocker), while an exploit tries to run or while the file is being downloaded/created or while the malware is executed (either by the exploit or by the user). After the malware is executed (if not blocked before), we wait several minutes for malicious actions and also to give e.g. behaviour-blockers time to react and remedy actions performed by the malware. If the malware is not detected and the system is indeed in-fected/compromised, the process goes to “System Compromised”. If a user interaction is required and it is up to the user to decide if something is malicious, and in the case of the worst user decision the system gets compromised, we rate this as “user-dependent”. Due to that, the yellow bars in the results graph can be interpreted either as protected or not protected (it’s up to the user).

Due to the dynamic nature of the test, i.e. mimicking real-world conditions, and because of the way several different technologies (such as cloud scanners, reputation services, etc.) work, it is a matter of fact that such tests cannot be repeated or replicated in the way that e.g. static detection rate tests can. Anyway, we log as much as reasonably possible to prove our findings and results. Vendors are invited to provide useful logs inside their products which can provide the additional data they want in case of disputes. Vendors were given after each testing month the possibility to dispute our conclusion about the compromised cases, so that we could recheck if there were maybe some problems in the automation or with our analysis of the results.

In the case of cloud products, we will only consider the results that the products had at the time of testing; sometimes the cloud services provided by the security vendors are down due to faults or maintenance downtime by the vendors, but these cloud-downsides are often not disclosed/communicated to the users by the vendors. This is also a reason why products relying too much on cloud services (and not making use of local heuristics, behavior blockers, etc.) can be risky, as in such cases the security provided by the products can decrease significantly. Cloud signatures/ reputation should be implemented in the products to complement the other local/offline protection features and not replace them completely, as e.g. offline cloud services would mean the PCs being exposed to higher risks.


We are focusing to include mainly current, visible and relevant malicious websites/malware that are currently out there and problematic to ordinary users. We are trying to include about 40-50% URLs pointing directly to malware (for example, if the user is tricked by social-engineering into follow links in spam mails or websites, or if the user is tricked into installing some Trojan or other rogue software). The rest are drive-by exploits – these usually are well covered by almost all major security products, which may be one reason why the scores look relatively high.

We use our own crawling system to search continuously for malicious sites and extract malicious URLs (including spammed malicious links). We also research manually for malicious URLs. If our in-house crawler does not find enough valid malicious URLs on one day, we have contracted some external re-searchers to provide additional malicious URLs first exclusively to AV-Comparatives and look for addition-al (re)sources.

In this kind of testing, it is very important to use enough test cases. If an insufficient number of sam-ples are used in comparative tests, differences in results may not indicate actual differences among the tested products1. In fact, we consider even in our tests (with thousands of test-cases) products in the same protection cluster to be more or less equally good; as long as they do not wrongly block clean files/sites more than the industry average.

Hierarchical Cluster Analysis

The dendrogram (using average linkage between groups) shows the results of the hierarchical cluster analysis. It indicates at what level of similarity the clusters are joined. The red drafted line defines the level of similarity. Each intersection indicates a group (in this case 4 groups). Products that had aboveaverage FPs (wrongly blocked score) are marked in red (and downgraded according to the ranking system below).


Ranking System

Ranking system
Protection score
Cluster 4
Protection score
Cluster 3
Protection score
Cluster 2
Protection score
Cluster 1
< ∅ FPs
> ∅ FPs

Test Results

Below you can see an overview of the individual testing months:

March 2012 – 512 test cases

April 2012 – 492 test cases

May 2012 – 464 test cases

June 2012 – 691 test cases

We do not give in this report exact numbers for the single months on purpose, to avoid the little differ-ences of few cases being misused to state that one product is better than the other in a given month and test-set size. We give the total numbers in the overall reports, where the size of the test-set is bigger, and more significant differences may be observed. Interested users who want to see the exact protection rates (without FP rates) every month can see the monthly updated interactive charts on our website.

False Positive (False Alarm) Test Result

The false alarm test in the Whole-Product Dynamic “Real-World” Protection test consists of two parts: wrongly blocked domains (while browsing) and wrongly blocked files (while downloading/installing). It is necessary to test both scenarios because testing only one of the two above cases could penalize products which focus mainly on one type of protection method, either e.g. URL/reputation-filtering or e.g. on-access / behaviour / reputation-based file protection.

Wrongly blocked domains (while browsing)

We used around one thousand randomly chosen popular domains. Blocked non-malicious domains/URLs were counted as false positives (FPs). The wrongly blocked domains have been reported to the respective vendors for review and should now no longer be blocked.

By blocking whole domains, the security products not only risk causing a loss of trust in their warnings, but also possibly causing financial damage (besides the damage to website reputation) to the domain owners, including loss of e.g. advertisement revenue. Due to this, we strongly recommend vendors to block whole domains only in the case where the domain’s sole purpose is to carry/deliver malicious code, and otherwise block just to the malicious pages (as long as they are indeed malicious). Products which tend to block URLs based e.g. on reputation may be more prone to this and score also higher in protection tests, as they may block many unpopular/new websites.

Wrongly blocked files (while downloading/installing)

We used around two thousand different applications listed either as top downloads or as new/recommended downloads from various download portals. The applications were downloaded from the original software developers’ websites (instead of the download portal host), saved to disk and installed to see if they are blocked at any stage of this procedure. Additionally, we included a few clean files that were encountered and disputed over the past months of the Real-World Protection Test.

The duty of security products is to protect against malicious sites/files, not to censor or limit the access only to well-known popular applications and websites. If the user deliberately chooses a high security setting, which warns that it may block some legitimate sites or files, then this may be considered acceptable. However, we do not regard it to be acceptable as a default setting, where the user has not been warned. As the test is done at points in time and FPs on very popular software/websites are usually noticed and fixed within a few hours, it would be surprising to encounter FPs with very popular applications. Due to this, FP tests which are done e.g. only with very popular applications, or which use only the top 50 files from whitelisted/monitored download portals would be a waste of time and resources. Users do not care whether they are infected by malware that affects only them, just as they do not care if the FP count affects only them. While it is preferable that FPs do not affect many users, it should be the goal to avoid having any FPs and to protect against any malicious files, no matter how many users are affected or targeted. Prevalence of FPs based on user-base data is of interest for internal QA testing of AV vendors, but for the ordinary user it is important to know how accurately its product distinguishes between clean and malicious files.

The below table shows the numbers of wrongly blocked domains/files:

  Wrongly blocked clean domains/files
(blocked / user-dependent[1])
Wrongly blocked score
[lower is better]
AhnLab, AVG, BitDefender, eScan, G DATA, McAfee, Panda, Webroot – / – (-)
F-Secure, Qihoo, Tencent 1 / – (1) 1
Kaspersky 0 / – (3) 1.5
ESET 2 / – (2) 2
PC Tools 4 / 0 (4) 4
AVIRA 5 / – (5) 5
  average (7) average (6)
Sophos, Fortinet 10 / – (10) 10
Avast – / 28 (28) 14
Trend Micro 21 / – (21) 21
BullGuard 21 / 4 (25) 23
GFI 34 / – (34) 34

[1] Although user dependent cases are extremely annoying (esp. on clean files) for the user, they were counted only as half for the “wrongly blocked rate” (like for the protection rate).

To determine which products have to be downgraded in our award scheme due to the rate of wrongly blocked sites/files, we backed up our decision by using statistical methods and by looking at the average scores. The following products with above-average FPs have been downgraded: Avast, BullGuard, Fortinet, GFI, Sophos and Trend Micro

Summary Result

Test period: August – November 2015 (1606 Test cases)

The graph below shows the overall protection rate (all samples), including the minimum and maximum protection rates for the individual months.

BlockedUser dependentCompromisedProtection Rate
[Blocked % + (User dependent % / 2)]
G DATA 2147 1 1199.5% 1
Kaspersky 2146 2 1199.4% 1
Qihoo 2143 6 1099.4% 1
BullGuard 2131 21 799.2% 1
F-Secure 2135 10 1499.1% 1
Avast 2110 28 2198.4% 2
ESET 2117 1 4198.1% 2
AVIRA 2107 13 3997.9% 2
Sophos 2112- 4797.8% 2
Trend Micro 2108- 5197.6% 2
AVG 2103 6 5097.5% 2
GFI 2102- 5797.4% 2
Panda 2097- 6297.1% 2
eScan 2094- 6597% 2
PC Tools 2024 126 996.7% 2
Tencent 2052 32 7595.8% 3
Fortinet 2046- 11394.8% 3
McAfee 2041 6 11294.7% 3
AhnLab 1999- 16092.6% 4
Webroot 1963 1 19590.9% 4

Award levels reached in this Real-World Protection Test

The awards are decided and given by the testers based on the observed test results (after consulting statistical models). Microsoft was considered as a baseline and was therefore tested out-of-competition, due to which it is not included in the awards page. The score of Microsoft Windows Defender would be equivalent to STANDART. The following awards are for the results reached in this Whole-Product Dynamic “Real-World” Protection Test:

* these products got lower awards due to false alarms


Most operating systems already include their own firewalls, automatic updates, and may even ask the user before downloading or executing files if they really want to do that, warning that downloading/executing files can be dangerous. Mail clients and web mails include spam filters too. Furthermore, most browsers include Pop-Up blockers, Phishing/URL-Filters and the ability to remove cookies. Those are just some of the build-in protection features, but despite all of them, systems can get infected anyway. The reason for this in most cases is the ordinary user, who may get tricked by social engineering into visiting malicious websites or installing malicious software. Users expect a security product not to ask them if they really want to execute a file etc. but expect that the security product will protect the system in any case without them having to think about it, and despite what they do (e.g. executing unknown files). We try to deliver good and easy-to-read test reports for end-users. We are continuously working on improving further our automated systems to deliver a better overview of product capabilities.

Copyright and Disclaimer

This publication is Copyright © 2012 by AV-Comparatives ®. Any use of the results, etc. in whole or in part, is ONLY permitted after the explicit written agreement of the management board of AV-Comparatives prior to any publication. AV-Comparatives and its testers cannot be held liable for any damage or loss, which might occur as result of, or in connection with, the use of the information provided in this paper. We take every possible care to ensure the correctness of the basic data, but a liability for the correctness of the test results cannot be taken by any representative of AV-Comparatives. We do not give any guarantee of the correctness, completeness, or suitability for a specific purpose of any of the information/content provided at any given time. No one else involved in creating, producing or delivering test results shall be liable for any indirect, special or consequential damage, or loss of profits, arising out of, or related to, the use or inability to use, the services provided by the website, test documents or any related data.

For more information about AV-Comparatives and the testing methodologies, please visit our website.

(July 2012)