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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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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134 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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153 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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78 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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405 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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How to scan USB drive with clamav on Linux

Is there a way to scan the entire drive including auto-run and all partitions, including the master boot record (MBR)?
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4answers
553 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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76 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
127 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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871 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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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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429 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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685 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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How does a crypter for bypassing antivirus detection work?

I am talking about crypters used to encrypt files like viruses and keyloggers for the sole purpose of bypassing antivirus detection. How do they work?
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120 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
100 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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4answers
441 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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6answers
2k views

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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273 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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489 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
523 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
190 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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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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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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Is it ok to use computer while scanning for viruses?

Should one refrain from using the computer while a virus scan is in progress? Are there certain things that are ok and others not? For example is it ok to use a web browser while a scan is in ...
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386 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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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 ...
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1answer
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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 ...
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577 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
181 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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172 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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8answers
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Are signature based antivirus or antimalware effective?

Are signature based antivirus or antimalware solutions effective? Has the battle been lost against the ever increasing amount of malware, particularly rootkits, that are in the wild?
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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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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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548 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 ...
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667 views

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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1answer
383 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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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 ...
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5answers
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How can I know if my PC is getting infected?

I have installed an antivirus, but as no antivirus is perfect, what can I do to diagnose if my PC is getting infected? For example, keeping a close eye on what programs and tasks run when I turn my ...
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131 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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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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117 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 ...
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Is it necessary to scan users' file uploads by antivirus?

Web application allows users to upload files. Is it necessary to scan those files by antivirus? I'd want to hear answer in two scenarios: Type of file isn't checked when uploading. They are stored ...
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How antivirus companies create virus defnitions for new outbreaks

This question quite amazes me. I dont understand how antivirus companies get info about the latest viruses. have they installed some kind of filters to monitor the internet traffic ? Or they are ...
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How is a worm different from a virus?

In spite of various online articles, I'm a bit unclear on the distinction between a "worm" and a "virus". Two related questions-- Is there a useful and clear distinction here or no? If so, what is ...
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10answers
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How do you explain the necessity of “nuke it from orbit” to management and users?

When a machine has been infected with malware, most of us here immediately identify the appropriate action as "nuke it from orbit" - i.e. wipe the system and start over. Unfortunately, this is often ...
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1answer
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does Avast SafeZone actually make a difference?

SafeZone is a feature in Avast Anti-Virus which is like a virtual machine that only has a web broswer. The benifit of this is that it can't be infected with spyware and isn't suseptible to keylogers. ...
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100 views

Is there a website or free downloadable program to identify and remove malware from an ISO file?

Is there a website or free downloadable program that allows a user to identify and remove multiple types of malware from an ISO file?
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Whats the probability of a personal computer being hacked?

For a normal computer user following these practices: Have an up to date anti-virus with a firewall installed (Norton). Do not install cracked software. Do not open suspicious links or download ...
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3answers
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Do I have a virus on my hosted site?

A few weeks ago I hired an outsourcer from India to build for me a very simple PHP site. I bought PHP hosting and a domain name, and I gave him all the credentials together with the specification of ...