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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20
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3answers
2k views

Could malware move during a scan to avoid detection?

I think every AV-Scanner is using some predictable recursive scan to search files for malware. Couldn't malware easily detect a scan and just move to an already checked location, determined by knowing ...
0
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1answer
63 views

A sneaky way of disabling Microsoft Security Essentials?

For a long time I've been dismissing and ignoring this popup, which is easy since it only appears at boot (or logon) which is once every few months: But recently I became suspicious after a crash ...
3
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3answers
49 views

What is the precise difference between a signature based vs behavior based antivirus?

I do not understand very well the difference between signature based vs behavior based antiviruses. Please clarify the distinction between the two.
6
votes
2answers
71 views

SSL Handshake failure when antivirus is enabled

This is a problem related to SSL handshake failures when an anti-virus (Kaspersky) is in between. From WireShark, I am able to notice the SSL handshake successful (i.e towards the end client ...
-5
votes
3answers
59 views

What File Types Should I Scan Before Opening? [on hold]

In general, a person downloads some files from the Internet. Secure practice is to, at least, scan them before opening them. In light of this, what file types (i.e. extensions) should a normal user ...
-8
votes
0answers
41 views

Antivirus signature generating algorithm [closed]

I just want to know what technique or algorithm used by the most antiviruses to generate signatures of malware? e.g MD5. And how they generate their signature for a malware? Is it a whole file ...
6
votes
3answers
130 views

Does it matter which platform a file is scanned on for malware?

Different operating systems use different file types and file systems. Does it make a difference to a virus scan which system it is being run on and what type of malware it's looking for? I ask ...
1
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0answers
27 views

Norton Security disables Windows Firewall [migrated]

I want to re enable windows firewall but Norton also seems to have disabled the firewall control panel button " turn windows firewall on or off." What do I do?
2
votes
1answer
102 views

Is there a way to use VirusTotal.com offline?

I live at a place where we don't always always have internet. I wonder if there is something like VirusTotal but that could work without internet connection and sync when I have some wifi to update ...
3
votes
1answer
36 views

Methodologies for test & benchmark of Antivirus Software

I want to evaluate a new antivirus product which obviously hasn't undergone the tests by known test labs. So I want to measure its performance in different aspects and come up with common comparisons ...
-2
votes
1answer
42 views

Is there a Antivirus called “Application level antivirus” [closed]

Recently I heard the term called application level antivirus. I just wanted to know is there anything like that. I heard a company provides such kind of antivirus(I dont want to post company name) I ...
25
votes
9answers
5k views

What makes it difficult to have a hardware antivirus?

MS Windows is always vulnerable to virus and worms and having an antivirus is almost necessary. How is it possible that hardware antiviruses don't exist? The idea sounds pretty good, if the antivirus ...
10
votes
2answers
326 views

Custom Metasploit payload with UAC bypass

The machine I am attacking has anti-virus installed. I have managed to use Veil Framework in order to create an initial reverse shell payload that is undetected by the AV. However, UAC is enabled on ...
36
votes
2answers
5k views

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 ...
4
votes
2answers
200 views

How do cryptographic algorithms help hackers to bypass Antivirus software?

I was wondering how do hackers use cryptography for bypassing antivirus software. I don't have some deep understanding on how antivirus software works, but I know that every antivirus has base of ...
8
votes
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 ...
1
vote
0answers
58 views

How to deal with virus causing massive startup delay? [closed]

I have an SSD and normally startup only takes seconds. However recently my PandaSecurity said it detected a virus and needed to restart to purge it. When I allowed the computer to restart, the ...
1
vote
2answers
121 views

How effective is antivirus software? [duplicate]

On one hand, most antivirus websites claim their products are highly effective, and I've seen antivirus "test" videos claiming 95%+ detection rates for new malware (as in less than a day old, not old ...
1
vote
4answers
447 views

Protecting Backups from Viruses

Currently we are using ReadyNAS by NETGEAR to hold all our images from all our machines. My question is can viruses expand from the machines and infect the NAS drive and the backups? We are using ...
1
vote
3answers
116 views

How to get started as a Malware Analyst? [closed]

Sorry if this is posted in the wrong section. A little about me: I'm going to be a sophomore in the fall at university, my major is Computer Science (Information Assurance). I've been interested in ...
6
votes
2answers
3k views

How to pass PCI DSS 2.0 anti-virus requirement (5.1) on Linux?

PCI DSS 2.0 Requirement 5.1 states: 5.1 Deploy anti-virus software on all systems commonly affected by malicious software (particularly personal computers and servers). This requirement ...
2
votes
3answers
140 views

How do anti-viruses identify malicious pages when JavaScript doesn't have access to the filesystem anyway?

Disclaimer : I am not very knowledgeable about the behaviour of anti-viruses (anti-viri?). I was wondering how they discern between malicious and non-malicious pages if all they can read is the HTML ...
8
votes
2answers
2k views

Antivirus for scanning anonymous file uploads

Since I have no experience with AV solutions on Unix-like environments, I would need help with suggestions on something that can be suitable for scanning files that are uploaded by anonymous users ...
1
vote
0answers
34 views

How long does it typically take to distribute malware signatures?

Are there industry-wide measures that identify how long it typically takes to identify, develop and distribute new malware signatures? I want to understand how long organizations are typically ...
5
votes
1answer
173 views

Should veil framework produce packed and obfuscated binaries which bypass virustotal?

I have been working with the veil framework to test an internal IDS system I have in place. I have used a public malware sample which produces an 8/53 hit score on Virustotal and run it through the ...
1
vote
4answers
25k views

What is the difference between antivirus and firewalls

I need a brief explanation about the differences between antiviruses and firewalls
6
votes
1answer
1k views

How can one create one's own anti-virus scan server at home? [closed]

I suppose that every one used a service such as virustotal.com, anubis.iseclab.org, or any other service that could provide the same objective to scan same files. So my question is how can I make ...
2
votes
0answers
72 views

Remote accessed? [closed]

I'm not an IT professional but I'm hoping someone will take the time to answer this. I'm not generally such an idiot but this happened: I was using Ancestry.com on Chrome and clicking links within ...
6
votes
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 ...
0
votes
1answer
90 views

Possible virus hogging bandwidth [duplicate]

My computer might have a virus infection. I have used Norton Internet Security and Power Eraser to scan the computer but it still did not work. The traffic on my PC looks like this I used resource ...
23
votes
6answers
24k views

How to scan a PDF for malware?

Can anyone suggest an automated tool to scan a PDF file to determine whether it might contain malware or other "bad stuff"? Or, alternatively, assigns a risk level to the PDF? I would prefer a free ...
1
vote
2answers
81 views

Anti-virus anonymity question

Many people pay for VPNs and select the VPN based on whether or not that VPN keeps logs of the user's activities and if so for how long. The motivation is privacy- they don't want their surfing habits ...
2
votes
4answers
276 views

Could antivirus programs not just scan all files upon creation?

Could antivirus programs not just scan all files as they are created instead of using on access scanning. Would this kind of approach not be much more scure?
0
votes
1answer
51 views

What kinds of PE file infection can AV software detect?

I wonder what kind of infections AV software is capable of detecting: only if the file is signed? also if the entry point isn't changed? does it also have hashes for non system files? what if the ...
0
votes
4answers
541 views

How can I scan hosted POP3 or IMAP e-mail for viruses?

In our company we use a hosting provider for e-mails and it seems they don't scan incoming email against viruses. And our employees does not very careful about attachments... So we deal with virus ...
18
votes
3answers
15k views

Why is 'avast! Web/Mail Shield Root' listed as CA for google.com?

I just noticed something weird in my browser: the certificate for www.google.com has been issued by avast! Web/Mail Shield Root. Should I be worried? I am using avast! Antivirus so it's probably a ...
8
votes
2answers
964 views

Are there / have there ever been viruses that completely evade virus scanners for very long?

Are there, or have there ever been viruses that completely evade all virus scanners for a long time (e.g. longer than a year?)
3
votes
1answer
68 views

Any reason for a user to use an email scanner if they don't use any offline mail clients?

I typically recommend that users enable a real-time email scanner (aka a mail shield) in order to detect a possible vector used by malware. Even if they don't use an email application, the rationale ...
-1
votes
3answers
356 views

How to make undetectable malware [closed]

Fred Cohen in 1986 has proved in his Ph.D. thesis the undecidability of viral detection (no perfect virus checker can ever exist). My question is : Is it possible for a malware to stay very long time ...
0
votes
0answers
37 views

What can Android Antivirus apps really do? [duplicate]

I am studiying about android development and given the permission restriction between apps and isolation that the operating system itself imposes, I was wondering what can an antivirus app distributed ...
0
votes
1answer
349 views

How exactly do viruses get on computer when watching online porn? [duplicate]

I've been hearing that your computer could get infected when you visit porn sites, especially when watching videos. But how exactly do viruses get on client side? Is it by cache? Or maybe by ...
2
votes
2answers
77 views

Virus - by-pass with binairies repackaging

Why don’t « hackers » (or more accurately, « virus maker ») just do repackaging over their malware to by-pass antivirus software? Because it resolves the issue of the virus signature (kind of hash), ...
0
votes
3answers
103 views

It is possible detecting threat by only with file information?

It is possible detecting threat by only with file information of a file like file's hash(md5,sha1,sha256, etc), file size, mime type, etc with ClamAV or Comodo AV for linux with shell command? It ...
1
vote
3answers
83 views

Gaming Mods Security Risks

I read the following post, and while the questions was specific to SkyRim, the more general answer was that it depends on the game. I wanted to pose a more generic question here to the security folks. ...
5
votes
4answers
690 views

How to keep Mac secure from viruses, malware and keyloggers?

How can I download and install software and make sure that it is not infected with viruses, malware or a keylogger? Also, I heard that Macs "don't get viruses". Is this true? Is it a good practice to ...
5
votes
2answers
142 views

Are malware detection rulesets publicly discoverable?

I am uncertain about how public malware detection rulesets are? By a "ruleset" I mean the rules, usually written in Yara, that malware detection engines use to determine whether a file or memory ...
74
votes
10answers
6k 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 ...
1
vote
2answers
559 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 ...
2
votes
1answer
239 views

Should anti-virus detect metasploit payloads?

As part of a workstation pen test, I copy a simple metasploit payload onto the workstation, and try to run it. Usually this is blocked by anti-virus software. However, sometimes it isn't (I won't name ...
6
votes
5answers
8k views

Is it worth it to get paid anti-virus software?

With the rise in cybercrime, I am slightly worried about my computer security. I have been using open sourced anti-virus AVG for years and it has been doing well. Are anti-virus software like Norton ...