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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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
46 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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1answer
26 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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2answers
134 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
85 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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76 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
188 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
67 views

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
55 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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2answers
49 views

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
646 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
73 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
71 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
101 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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2answers
75 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
138 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
174 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
545 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
67 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
32 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 ...
96
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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
75 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
48 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
135 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
73 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
70 views

What is quarantine

What antiviruses actually do when quarantining a malicious threat does it compress the file using some algorithm or just change the extension of the file or just move the file to a safer location
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1answer
168 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
43k 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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1answer
25 views

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 ...
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2answers
72 views

If signature based AV software is becoming obsolete, what is the home user to do?

Assuming one is a worried home user who keeps certain sensitive files, works on personal projects, and generally wants to ensure the integrity of their single system (to keep it simple), what's a user ...
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2answers
56 views

Protection against file distributed malware

Let's say I have one server called A which host an upload website which is connected at the network connection B. Let's say one of my clients uploads multiple .rar files of 1 MB (that contains malware ...
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1answer
51 views

Best appraoch to test inhouse firewall effectiveness

We have Fortigate 100D that has antivirus profiles enabled like SMPT, POP3 and IMAP. How one could make sure that the antivirus is working as expected ? For instance it seems that Fortigate has ...
4
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1answer
68 views

Thorough computer scan

I'd like to give my computer an overall deep scan against all kinds of malware. I was infected about a year ago and I feel like there may still be some hidden rootkit on my HDD or something like that....
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2answers
16k views

I'm a White Hat and I develop my own viruses. Should I report it when almost all scanners say the executable is safe?

I develop my own viruses for 'scientific' purposes, namely to see if they pass the test of Virustotal.com. They all do, except for one or two scanners. Is this considered something you should report ...
3
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1answer
107 views

Can I trust my antivirus' assessment of my computer as clean, if it previously found threats?

Yesterday, I went to my Recycle Bin (for the first time in a while) to purge a bunch of files I had sent there. When I clicked on the folder, my antivirus warned me of a trojan out of the blue. Later, ...
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4answers
45k views

What is the difference between antivirus and firewalls

I need a brief explanation about the differences between antiviruses and firewalls
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2answers
118 views

How can someone know technically if antivirus provider tracks him? [closed]

Is there a technical way to make sure that your antivirus provider doesn't send any information from your computer? Is there a reliable list of antivirus providers that this issue was checked and it ...
3
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5answers
2k views

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 ...
0
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1answer
41 views

How Do AVs differentiate between normal cryptographic modules and viruses crypters

I have read that some viruses -in order to avoid AVs- use crypters to encrypt their code so that the AV can't detect them. so as a countermeasure, AVs are programmed to look for the crypter -in the ...
4
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1answer
78 views

Is there a name for an anti-virus station / kiosk?

I am not able to define the exact term for a station that is meant to scan whatever media coming from outside a company and that have the following specifications: The station should never be on any ...
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2answers
62 views

Why should anti-virus software scan on a file read?

I got a brand new PC today because I couldn't Bootcamp my Mac due to a shortage of disk space on its SSD. It had McAfee pre-installed on it, and, shortly afterward, I noticed a ton of performance ...
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2answers
70 views

Antivirus connects to their server over port 80

I ran a netstat and noticed that my computer has an always-established connection with my anti-virus (Avast) over port 80. I haven't gone as far as to parse through it in Wireshark, so I can only ...
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8answers
8k 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.