Antivirus or anti-virus software is used to prevent, detect, and remove malware, including but not limited to computer viruses, computer worm, trojan horses, spyware and adware.

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Scan password protected email attachments for malware

We have an email policy that prevents email from going through if it has password protected archive files attached. This is to protect users from viruses and trojans because the contents of the ...
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2answers
253 views

Manual Checks for Signs of Infection on Windows 7

Suppose I wanted to run some manual checks to see if my Windows 7 machine has been infected. I don't usually do anything to get it infected, but I would like to check whether the below steps are ...
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1answer
34 views

MacOS: quarantining data for import

I have collected over many, many years data from many sources, some of which could be questionable - for example an upload page on a web server at home - to the point where I don't completely trust ...
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3answers
2k views

Possible to detect packed executable?

A packer is a way of obfuscating an executable program, i.e., transforming so the result is still executable and has the same effect when run, but looks different (so it won't be detected by static ...
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0answers
130 views

How dangerous is Exploit.LNK.BadLnk.a (v)?

I have encountered a supposed low level eploit on my network at work, by the name of: Exploit.LNK.BadLnk.a (v). I have torn through pages of entries on google trying to find information on this bit of ...
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1answer
134 views

What is “KDV” in antivirus databases?

I scanned a file (virus) on VirusTotal and 3-5 antivirus labelled it as Generic.KDV.549626 Is there any central "KDV" database where all the entries related to a virus are stored?
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1answer
91 views

How does Look Out Secuirty and Anti-Virus determine if an app is harmeful?

For Android Lookout can scan an app before it is installed, and I think it scans a new app the first time it runs too. It displays the message "this app is safe" and I'm wondering, how does it ...
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3answers
336 views

Does validating a mime-type reduce or stop the need for virus scanning?

I am building a small web app in php, that accepts .doc /.docx / .rtf and .txt files. I've validated them against their mime-types. But now I'm thinking about virus scanning. I know there are systems ...
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1answer
2k views

Does anyone know how Avast File Reputation works?

Whenever I'm programming in C++, after I run a new executable, Avast suspends it informing me that "not much is known" about the file and asking if I'd like to continue execution or terminate the ...
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1answer
371 views

EMET and AntiVirus

I've just heard about and started playing with EMET and I am curious, do any AV or security suite applications do what EMET does or is EMET something entirely different?
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1answer
445 views

AV boot disks and Truecrypt encrypted drives

I was wondering if there were any "how-to" guides on what is needed to modify AV boot disks, such as Sophos, kaspersky, AVG etc in order to load the decryption drivers/bootloader for Truecrypt before ...
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1answer
96 views

Antivirus scanning [closed]

I use the avast free antivirus ... and i sort of noticed a very strange occurrence. Whenever I scan a document from avast, the application scans more data then there is on the document. For e.g., if ...
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2answers
195 views

How does a virus scanner inspect URLs entered in a browser?

I have a virus scanner installed (avast on Windows 8) and it blocked the access to malicious websites in Chromium. There's no proxy activated in Chromium so how is the scanner capable of rejected a ...
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1answer
259 views

Excluding executables in winsxs folder

I am facing a big problem since there are many msbuild.exe files in .Netframework and winsxs folders and I don't know if it is required to set all of them as trusted in the antivirus. The path ...
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1answer
3k views

How to check if your computer has a backdoor installed on it? [closed]

Just some time ago I had this unusual popup from Malwarebytes Anti-Malware (MBAM): I did a quick Google of the IP address and found this thread where the OP is complaining of MBAM blocking ...
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1answer
931 views

Study roadmap to write a crypter / backdoor

Recently I came across a site called SecurityTube.net, which has a ton of amazing security stuff. I'm following their Python Scripting Expert videos which are totally worth it. I also came across the ...
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1answer
1k views

Windows PE file and Malwares

Trying to understand how and why any virus, malware, worm and code injections are successful after all in a Windows Portable Executable format. I was going through the PE structure documentation, ...
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4answers
2k views

How effective are anti-virus products against real-world threats?

In a recent interview† with Dave Kennedy, he in passing pegged the average effectiveness of anti-virus products as detecting approximately 3% to 5% of current active threats. While AV comparisons ...
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2answers
195 views

If a user visited a malicious website a year ago, should we nuke from orbit to be safe?

A Microsoft Security Essentials virus scan just finished on one of our computers and it shows two potential threats in Internet Explorer's temporary internet files: Web page with Black Hole Exploit ...
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2answers
116 views

Virus Removal Boot Disks — a few questions

I'm new to working with and using a backdoor/virus with a boot disk. Can they be mounted to a USB drive? What options are out there and what should I look for in one? Are they practical? Do they ...
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2answers
13k views

How secure is the Windows 8 included Anti Virus known as Windows Defender?

How secure is the new Windows 8 anti virus known as Windows Defender? Does it have a protection against malware which uses UAC bypass/process injection/rootkits/process persistence/running the binary ...
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4answers
6k views

Are there faux/fake malicious websites to test web reputation services similar to EICAR?

Antivirus writers have agreed for their software to recognize a standard "fake" virus file - the EICAR file, to let users check, that the software is up and running. Are there any equivalent test ...
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1answer
619 views

Can a cracked antivrus software do the job? [closed]

Some of my friends say that their cracked antivirus software updates regularly, and does the job as same as a legitimate software would do. Is this possible? How do they bypass the activation key ...
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2answers
1k views

Can a firewall tamper with email attachments?

I am using Thunderbird as an email client for managing my different email accounts. Yesterday my friend sent me an email with a PDF attachment. Today when I tried to open the attachment I get the ...
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4answers
780 views

How can Antivirus differentiate between a Trojan and a normal remote desktop application software?

RAT (Remote Access Tool, e.g. Sub7) are considered malicious by Antivirus software. How can it distinguish between such patches and a client application for commercial software like NetSupport ...
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2answers
294 views

Is interpreted malware easier to detect than compiled malware?

Is compiled code more of a security risk than interpreted code? I'm under the impression that it is due to the fact that compiled code can hide malicious code from malware scans.
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1answer
112 views

Why isn't AV software configured to recognize installed program vulnerabilities?

Background (not necessary to read): I've used a few different major AV programs day-to-day over the years, and not one has ever informed me I was running code with known vulnerabilities. Not only ...
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4answers
680 views

What is nuke it from orbit? [duplicate]

I was reading this Windows 2003 Enterprise infected by Conficker; post-infection problems continue And they talk about nuking it from orbit (which apparently means wiping out the system and starting ...
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2answers
3k views

How do anti-virus apps for Android work?

There seems to be a lot of anti-virus apps for Android. On a desktop or server an anti-virus must run with super-user privileges, however I am pretty sure these mobile anti-viruses are running as an ...
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1answer
2k views

Should I install an antivirus on my mobile phone?

Is it advisable to install an antivirus for a mobile? I have recently purchased Note 2. Not too sure of how heavy application usage would I indulge into. But I would like to know if for safety ...
3
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2answers
231 views

Why some antiviruses detect viruses and some not?

I am curious why some anti-viruses detect viruses and some do not. From what I found online, antiviruses parse the binary files and check the sequence of code which is malicious(exists in virus ...
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3answers
287 views

How isolated are 2 operating systems on 1 harddisk?

Lets say I have 2 windows dual booting on the same harddrive (windws 7), How isolated are they? I am thinking that there should be up to date antiviruses software on both Windows, and they should be ...
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7answers
879 views

How to deal with a person who gets easily fooled by internet and mail scams?

alternative title: How to deal with a person who has gotten paranoid and doesn't want to go online anymore? A person, who has over the years been scammed many times, by bad spam/fraud emails, and ...
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2answers
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How do antiviruses scan for thousands of malware signatures in a short time?

Most antiviruses have hundreds of thousands or even millions of malware signatures and yet they scan many files in a reasonable short time with high detection rates. Even real-time scanners doesn't ...
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6answers
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How can I tell whether this computer is part of a botnet?

One of the computers that I manage (in the family, not business) has a weird set of files in its boot: bash.exe, curl.exe, uname.exe, sed.exe, rm.exe, tail.exe, cut.exe, awk.exe, cat.exe, chmod.exe, ...
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2answers
4k views

Anyone out there using Umbrella from OpenDNS? What exactly is it?

I'm still looking for a centrally-managed AV/malware management system and I've been testing out both Panda and Webroot (due to their 'cloud-based' structure that doesn't require a server for me to ...
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7answers
6k views

How should I select which antivirus software to install on my new laptop?

I'm in a bit of a dilemma here. I have bought a new laptop with no antivirus installed. I'm wondering how to choose an appropriate antivirus software to install.
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2answers
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Is Webroot's Business Endpoint Security up to snuff for mobile workforce?

I'm in a small software company and getting ready to begin supporting 7 remote sales guys out on the road. They all have recent ultrabooks and most of the tools they will be using are in in the ...
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6answers
3k views

Why do some antivirus programs find infections that others miss?

I have Avast Free antivirus on my Windows 7 PC and yesterday I used Bit Defender quick scan addons, which spotted a virus. In rechecking with Avast, it didn't pick it up. In scanning my system with ...
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3answers
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Are older viruses removed from virus definition files?

Antivirus software receives constant updates in the form of virus definition files, containing the patterns used to identify viruses. It is a feature present on most (if not all) major AV for at least ...
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1answer
551 views

How does one test AV against zero-day malware?

Lately, I've read several articles about anti-malware software and one thing caught my eye - ability to detect zero-day attacks. In short - how does anti-malware / anti-virus industry test their own ...
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4answers
8k views

Why Adobe is recommending McAfee security scan during flash player installation?

Why is Adobe recommending a McAfee security scan during the installation of flash player?
2
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4answers
1k views

Are malicious scripts in batch files detected by antiviruses?

we have many scripts in shared folders in our IT Department. Are malicious scripts in batch files detected by antiviruses?
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1answer
1k views

Where can a virus or other malware “hide” on common PC and Mac hardware?

I'm looking for a detailed list of locations that viruses can "hide" in modern hardware even after a reboot. Some things that come to mind include Boot BIOS/Firmware CPU Microcode Connected PCI ...
7
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1answer
890 views

Have any viruses leveraging the GPU been discovered in the wild? What is the mitigation?

This news article from 2010 discusses how a GPU can be used by a virus to avoid detection by common anti-malware/anti-virus software. The idea is to obfuscate the virus payload and leverage the GPU's ...
2
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4answers
542 views

Can I safely trust my Anti-virus protection?

Recently when I was trying to install a software which didn't happen to be from reputed sources, my anti-virus popped up a warning saying: XYZ-antivirus blocked you from visiting an infected ...
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4answers
2k views

Antivirus Engine based MD5 or SHA1 hash?

I'm trying to understand more about MD5 and SHA1 hashes algorithms and their behavior in serious security software(found this but not helped me more). Why does ClamAV use additional scanning ...
2
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1answer
151 views

How should I select an antimalware solution?

As I prepare to reinstall the software on my machine, I am currently reevaluating my choice of anti-malware software for home use. What factors should I be considering? How reputable are AV-test and ...
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3answers
137 views

Does AV software protect web applications (Twitter, Facebook, etc) from attacks? (CSRF, etc)

Is it correct to say that AV software focuses on downloaded executables and locally malicious activity, and it doesn't actively scan HTTP/S content for web based attacks such as CSRF, XSS, phishing ...
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3answers
165 views

How to tell what viruses are covered by your anti-virus software

One of our corporate twitter accounts recently started sending out DMs to its followers. Looking at the content of these it seems we'd become infected with Troj/Mdrop-EML. All computers on our ...