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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Does running a PowerShell script using an embedded System.Managment.Automation DLL prevent it from being scanned by AMSI?

A new feature called Antimalware Scan Interface, that allow AVs to 'see' Powershell commands executed, was introduced in Powershell v5. According to adsecurity, this feature seems to rely on the ...
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50 views

Virus Infected: unable to open anti-virus web sites?

Recently I installed KMSPico, after that many unwanted softwares were installed on my system, later I uninstalled all of them and removed related folders. But strangely from my system I couldn’t open ...
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1answer
101 views

What is quarantine?

What do antiviruses actually do when quarantining a malicious threat? Does it compress the file using some algorithm, does it just change the extension of the file, or does it just move the file to a ...
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2answers
42 views

What is meaning of the term Whitelisting in antivirus?

How exactly does whitelisting work and what does it mean in terms of antivirus software?
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31 views

How does quarantine feature work internally in antivirus? [duplicate]

I'm struggling to find out the internal encryption and details of quarantined file. if any body knows the information please share.
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1answer
49 views

How to deal with possibility of viruses on Dropbox, Google Drive, external hard drive, etc?

For home use, what is the best way to deal with viruses that could be on external storage, which seems like a great way for hackers to persist on your system even after a reformat. Maybe the best ...
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1answer
54 views

How does “password / keyboard-input protection” work?

I do own Kaspersky Internet Security (KIS) and BestCrypt Volume Encryption (BCVE) (unrelatedly) and both offer some mechanism (KIS) to "protect my passwords while I enter them". Kaspersky primarily ...
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3answers
2k views

Do thin-clients need antivirus?

I've just taken over as IT Manager in an environment where most of the end-users are using HP-based Win7 thin clients (approx 50 seats) to access a remote desktop server. All the servers & fat ...
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4answers
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Can AV software make sure quarantined files never get executed? [duplicate]

This Super User question made me ask, is it really a good idea to keep files in quarantine, when you don't know what they are yet? For what I know there are more or less 2 steps that need to be ...
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1answer
59 views

How does the quarantine of anti-virus/malware software work? [duplicate]

What is the quarantine of antivirus software? Is it just some strict user/group rights and changing file extension or is it an actual moving the file(s) to a virtual environment? How is this software ...
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2answers
736 views

Why does Antivirus Softwares have an Issue with EXE Packers

Im trying to pack an Executable using an Exe Packer like UPX.I packed and checked the File with VirusTotal.com.Here some 9 Antivirus Products say its a Virus actually its a harmless exe.I think the AV ...
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2answers
408 views

Why Antivirus Detects Simple Java Program as Trojan?

Just now I was testing a very simple code in Java when I noticed a strange thing. On compiling the program my antivirus detected it as trojan and deleted the jar file. Further it is not allowing me ...
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What's a free recommended anti-spyware program for Windows? [closed]

Its been years since I installed an anti-spyware program. Keyloggers and other nasties might have gotten installed and so I'm looking for a program to flush them out. I used to use Spybot-S&D, but ...
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1answer
82 views

How does Antivirus sandbox work?

Supposing we have a malicious .EXE which deletes (using DEL command with cmd) a sensitive system file. First, common antivirus will analysis the file with signature detection. Secondly, it will be ...
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2answers
14k 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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2answers
116 views

Detecting Process Hollowing

I was brainstorming methods of detecting process hollowing and other forms of code injection, and this one seemed pretty robust. Would it be possible for a "process hollowing scanner" to enumerate ...
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1answer
43 views

How does the recent discovered PowerPoint exploit work?

One of the recent blogs in Project Zero described a bug in the Symantec virus scanner in relation with PowerPoint files. But I do not understand how the rounding up to the length of the cache can ...
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59 views

Trying to build an offline virus total type product

I have been tasked with finding a way to scan a file using multiple AV products. The machines this is to be used on cannot be connected to the web, due to lab restrictions and the AV products cannot ...
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1answer
62 views

What might be the reason for an major antivirus software to not detect an malicious DNS entry?

I recently installed the trial version of Kaspersky as I had always a good impression of the features of their software. I also bought a 1 PC 1 year license, but didn't unsealed it yet as something ...
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2answers
171 views

Where to download thousands of virus samples for AV testing?

I'm making an antivirus test just for my own, and I need thousands of malware samples (about 10k-30k, but the more the better). Please don't even mention Eicar test file because this will be a ...
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1answer
98 views

Can the HALT CPU instruction be used to stop attacks?

Not sure what the HALT CPU instruction is used for these days but I was thinking that if there was a kind of watchdog process that could determine if a computer had gotten infected and stop it right ...
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1answer
82 views

A have virus in Avira Antivirus(macos) aescn.dylib file [closed]

I get a virus report from TrendMicro-HouseCall, that the file aescn.dylib(sha256 ae96a241177e0c46cd70892593eb7af5a76fad5175bfb76681a85bf270af777d) is a virus called Keypress-9. I checked it on ...
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2answers
250 views

What Is “Kaspersky Security Center Network Agent”?

I see this in the program list on my office laptop. I believe it is the antivirus software installed by the official networking staff but I don't see where it is in my windows. I never see any updates ...
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1answer
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Accepting Avast Antivirus MITM certificate “securely”

I have a multiplatform client plugin that has its own trust store (ie this client app does not trust the OS trust store) that is used to talk to a webservice over TLS. Clients that have Avast ...
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1answer
58 views

Is virus removal a security risk comparing to reinstalling everything from a clean source? [duplicate]

Why would it be a good idea to run a tool to remove a virus? You know that your system was compromised, but you don't know whether the antivirus tool will work.
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What are the technical implementation differences between signature-based scanning and heuristic-based scanning?

Signature-based scanning works by comparing something to a database. So does this basically amount to scanning a file x for string foobar? I know heuristic-based scanning can detect new threats that ...
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3answers
776 views

Where Does ClamAV Get Its Virus Signatures?

I see that ClamAV has virus definition files which are mostly hash codes in md5, sha1, and sha256 formats, which either look at the whole file or what are called PE sections of an executable file. Of ...
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1answer
80 views

“Segmented” malware

I've been researching how anti-malware tools function and I feel like I'm missing something with heuristic analysis. What I've learned so far Anti-malware programs can use heuristic analysis and ...
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1answer
237 views

Avira Antivirus acting as a virus [closed]

I have a Avira Antivirus installed on Windows 7. The problem is now when I click on any button or click to uninstall any program it redirects me to the Avira website where it says upgrade it for more ...
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80 views

If I can disable antivirus tamper protection, couldn't a malicious worm do it as well?

I was wondering how those client softwares protect themselves from worms / malwares etc. Symantec protects their files from malicious users / admins with the tamper protection mechanism, but sometimes ...
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3answers
146 views

Methods for determining if a file is encypted?

I am working on a anti-ransomware project. It simply monitors the filesystem, and watches for files being created, and deleted. (also monitors for known ransomware file extensions.) Basic Operation: ...
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2answers
198 views

How can you be sure that there is a virus on your computer?

Am I being paranoid? I'm seeing signs of a virus everywhere on my computers but I have no way of being sure. I've tried scanning with Windows Defender multiple times but haven't found anything. My ...
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1answer
572 views

Are keyboard hooks inherently malicious?

My software is using low-level keyboard and mouse Win32 hooks for legitimate reasons (if it's any relevant, it's for determining a change in the caret position of the active code pane in the VBA IDE). ...
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1answer
70 views

Avast attempts to connect to the Internet when I try to download email [closed]

The file AVAST (Software\Avast\AvastSvc.exe) tries to connect when I check my email. When I forbid access to the internet for AvastSvc.exe, I can't connect to POP3 & SMTP. I'm not sure where all ...
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1answer
43 views

Server loaded with antivirus lets viral file go through

We have a .NET MVC website with a WCF Service as a service layer. One of the feature that the service offers is the ability to upload documents. When we asked our security consultant to test our ...
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11answers
8k views

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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2answers
1k views

Antivirus, antimalware and antispyware software. What is the difference?

What is the difference between antivirus, antimalware and antispyware software? If any clear distinction can be defined.
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4answers
4k views

Avast AV could read Firefox saved passwords

My friend uses Firefox's built-in password manager feature to save passwords for sites. Later, after installing Avast Free Antivirus there was a feature called Passwords on the Avast UI. When accessed ...
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2answers
85 views

Mac OS X vulnerabilities and not having the need for an antivirus?

I have just read news about Mac OS X vulnerabilities and wondered why would people say that you don't need an antivirus if you are using a Mac? There are vulnerabilities in other operating systems ...
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1answer
54 views

May I install more than one anti ransomware on the same pc?

I installed Bitdefender anti ransomware free tool, but as I read: It is only good against CryptoWall and CTB-Locker. So I'd like to install some others, but I wonder: Is it recommendable to ...
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2answers
163 views

The best way to prevent ransomware and virus? [closed]

I am using Avast free antivirus real time protection and weekly scan Malwarebytes free anti malware weekly scan Malwarebytes Anti-ransomware EMET good enough? Anything else I should do or choose ...
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4answers
4k views

Can I block viruses from a USB stick by scanning it before opening its folder?

I inserted my USB stick into a friend's PC which was full of viruses, malwares and adwares. Therefore I suppose they attacked my USB device as well. Now I want to use my USB device on my PC without ...
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2answers
78 views

VirusTotal desktop file uploader seems infected

I wanted to scan my process with VirusTotal.com and for this I downloaded vtuploader2.2.exe from their website. Before executing, I uploaded it to VirusTotal.com and scanned it for viruses to make ...
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5answers
4k 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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1answer
173 views

Antivirus monitoring activity: why do they not have an internal firewall to prevent processes' access to user's documents?

A question that arises after an updated and licensed version of Norton Internet Security has detected a trojan installed in my new laptop (Windows 7 installed on 26 Aug'15 and fully updated). Trojan ...
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4answers
2k 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
82 views

What are the security implications of autorun and external drives?

I have some questions about the security implications of accessing internal and external storage since I cant find any more information on it from what I've read. I have read about a variety of ...
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1answer
45k views

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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What security measures to be considered [closed]

First, I know kali Linux is not suitable for day to day work. Since I am using Windows PC with low ram so I didn't prefer installing it on a virtual machine. I have totally uninstalled my windows (I ...
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1answer
2k views

Bitdefender Antivirus SSL Cert substitution

I am using Bitdefender AV 2013 ed and I have noticed that when the Scan SSL is enabled in the configuration BD will use a local certificate, as mentioned here. This modifies the cert chain with BD as ...