Software which includes anti-spyware, anti-rootkit, anti-phishing, and other technologies that attempt to identify and/or block malicious programs.

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44
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8answers
8k views

Can we trust antivirus software?

There are a lot of free antivirus software and free versions of commercial anti-malwares. Can we really trust these free antivirus programs? The same question about commercial antivirus software. ...
38
votes
8answers
19k views

Are two anti-virus better than one in protecting your computer?

A century old adage: The more the merrier. In general, does this adage hold true in regards to the number of anti-virus software you should have on your PC? Are there any limits before it actually ...
38
votes
2answers
7k 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 ...
26
votes
6answers
29k 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 ...
23
votes
3answers
3k 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 ...
23
votes
1answer
1k views

CSS based attacks

I'm currently working on a plugin for a CMS which should allow content editors to write inline style tags. I'm looking for advice / links on how inline styles could be abused. Part of the reason ...
21
votes
2answers
3k views

Can a Trojan hide itself, so its activity doesn't appear in task manager process? [duplicate]

Can malicious software hide itself, so its activity doesn't appear in the list of processes from Task Manager? Can it hide itself so when someone is controlling your computer, even if you open Task ...
21
votes
2answers
4k views

How would one know if they have a rootkit?

Are they impossible to detect? Seeing as the attacker has admin rights and could modify anti virus software that might otherwise be used to detect or circumvent a root kit. Are there certain red flags ...
20
votes
4answers
3k views

Reverse engineering malware/viruses

Assuming a machine has malware, regardless of how it got there, one thing I would like to learn to do is to take the binary file and reverse engineer it to see what the malware is doing/has already ...
18
votes
4answers
708 views

Malware - are removal tools acceptable or is bare metal re-install the only safe option?

I see a number of companies offering "malware removal" services. I see some software that claims to be able to remove malware from an infected machine. Is using a removal software tool to 'clean' an ...
17
votes
8answers
2k views

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?
15
votes
7answers
5k views

How is it possible to embed executable code in an image

I was reading up on FireEye and came across this NYTimes article detailing a Skype chat where an image was sent that was laden with malware: Quote: To gain access to information on the ...
13
votes
3answers
5k views

Detecting reflective DLL injection

In the past few years, malware (and some pen-test tools like Metasploit's meterpreter payload) have begun to use reflective DLL injection (PDF) to load a DLL into the memory of a process. The benefit ...
12
votes
8answers
2k views

Are antiviruses still useful? [duplicate]

Are anti-viruses useful nowadays ? Given the number of viruses that are developed and spread monthly, and given the fact anti-viruses are based on virus signatures, I wonder how much it is useful and ...
11
votes
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 ...
10
votes
4answers
9k 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?
10
votes
2answers
471 views

Is email more secure when not letting any zipped content through?

Ah. This is a bit of a soft question, but I though there might be some here that can share some insight. I'm a developer. Sometimes I need to send a (bugfixed) DLL or EXE file to a customer. If this ...
10
votes
4answers
4k views

How to detect Meterpreter and similar malware?

Is it possible to find Meterpreter or similar malware which doesn't modify the hard disk but is only stored in RAM? Most common anti-rootkit software like rkhunter and chkrootkit don't find it.
9
votes
8answers
804 views

Battling Malware without spending money

Our environment consists of about 80 users running Windows 7. Previous to me showing up as a full time IT employee, the company had contracted an outsource IT solution. As part of their set up, they ...
8
votes
3answers
2k views

Using MD5 for malware ids: collision attack risks?

It has been known since 2004 that the MD5 hash is vulnerable to collision attacks (update - not "preimage" attacks - my mistake....). Yet it still seems that people are using it to identify malware. ...
8
votes
2answers
385 views

Are there any independent organizations doing (publicly available) IT security research?

When looking up security risks on the net I find that all research being cited (if any is cited) always seems to come from the Anti-Malware companies. (just e.g., this article cites F-secure, AVG and ...
7
votes
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.
7
votes
1answer
968 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 ...
6
votes
3answers
2k views

vt-d Virtualisation and Trusted Execution Technology

Being a long time VirtualBox user and having recently purchased a new laptop equipped with an intel i7 720QM I discovered that it supported vt-d. In the meantime I've found out that vt-d comes with ...
6
votes
6answers
7k 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, ...
6
votes
1answer
364 views

Why Antiviruses does not check the library modules of exe to detect hook?

I write a simple keylogger by C# in Windows (using Hook method SetWindowsHookEx). I checked my application with most antivirus and anti-spyware programs, but none detect it. Why don't these antivirus ...
6
votes
3answers
3k 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 ...
6
votes
1answer
86 views

Methods to Monitor Ads For Malware on Mobile Devices

I've noticed that malware being introduced to a mobile application or web application through advertisements, unknown to the developer of the application, is becoming increasingly popular. I've been ...
5
votes
2answers
488 views

Signature-based antiviruses

Do signature-based antiviruses search for the exact matches of the signatures they have in their database with those of viruses to analyse ? I ask this question because I wonder if it is the reason ...
5
votes
3answers
7k views

Javascript Malware: How does it work, and how can it be mitigated?

I am wondering how malware gets served through Javascript. I've noticed a few illegitimate pop-ups while visiting some financial websites. I wonder how malware exploits work against the application ...
5
votes
7answers
454 views

Malicious Websites

Just wanted to get everyone's opinion on this. In Information Security, you get various alerts about particular machines on your network going to sites and/or IPs that have been flagged as ...
5
votes
3answers
707 views

How do anti-virus & anti-malware programs protect themselves?

I would assume that A/V products would need to employ the same kinds of techniques used by the software they are trying to cleanse to ensure that they can continue to run in such hostile environments. ...
5
votes
2answers
97 views

apple.com exploit attempt?

I recently browsed to apple.com; and the page crashed a few times, then after I reloaded I was given this alert after my browser attempted to redirect to ...
4
votes
4answers
1k views

To what extent is FREE 3rd party antivirus software better than Windows 8 defender (if any)?

As someone who is not in a position to currently purchase an antivirus suite, I would like to know if having a free Avira or Avast or similar program is worth the overall system performance drop (I ...
4
votes
3answers
165 views

Duqu and other reference material for security people

I would like to read more on Duqu and similar exploits when they appear. The problem is that most references from google are for laymen. Isn't there a reference website or... that reports on these ...
4
votes
1answer
3k views

What are the methods to find hooked functions and APIs?

Many malware executables use hooking to be invisible. I am familiar with some hooking methods, I'm not sure what methods exist for detecting them. Is there a way to tell when a function call has been ...
4
votes
1answer
2k views

Enterprise Anti-virus for Linux?

I know this question is probably at risk of offending the guidelines but our IaaS provider was unable to offer us an anti-virus solution for our Linux servers. We are deployed in an enterprise cloud ...
4
votes
3answers
614 views

How can I recognize and find file(s) dropped by malware?

Suppose I am doing malware analysis. How can I recognize if, during the analysis process, a piece of malware dropped a file in my system, and if so, the path of the file? What are the procedures, ...
4
votes
1answer
954 views

Icesword rootkit detector, How does it work?

I'm curious about how I can learn more about icesword rootkit detector. I've only used it and never studied it myself. Ive always been curious how it works. As far as I understand it works by ...
4
votes
1answer
372 views

What is behaviourism and heuristic control in anti-virus software and how does it work?

In one local magazine I read interview with Adrian Porcescu, who is a technical consultant that works for Kaspersky Lab. Among other things, he says their anti-virus uses behaviourism and heuristic ...
4
votes
2answers
79 views

Log of all processes running on a computer

I'm new to the security domain and I want to ask - Does every program leave an 'imprint' in a log of some kind, in a laptop or a PC - of whatever process it ran. If yes, can they be analysed?
4
votes
2answers
669 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 ...
4
votes
2answers
174 views

Are there any known cases were antivirus software have deliberately ignored malware?

Are there any known cases were antivirus companies for some reason have choosen to make their product allow/ignore malicious software? The reason could be government coercion or former trustworthy ...
4
votes
2answers
5k views

Cryptolocker: can servers be protected?

I'm IT in a small company. The network is about as ancient as most of the staff (at 30, I'm the company's youngest), and the staff also is notorious for spreading viruses around the network despite ...
4
votes
1answer
98 views

How does Trusteer Rapport make accessing websites more secure?

Trusteer claims that: Trusteer Rapport verifies that you are really connected to the genuine website as opposed to a fake website created by criminals. Surprisingly, it is not trivial to reach a ...
4
votes
1answer
2k 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 ...
4
votes
3answers
129 views

Best way to check if your browser is secure

There is a lot of Malware checking software which seems is just a virus. How can you check for sure that your Windows 8 computer is uninfected with virus and malware? Is malwarebytes enough, or ...
4
votes
1answer
225 views

Invoke an antimalware scanner from code on azure Roles

We have a requirement to scan uploaded images via azure services. I found that Azure has a free out of the box solution http://azure.microsoft.com/en-us/support/legal/endpoint-protection/ However ...
4
votes
1answer
213 views

firewall with cloud based malware analysis risks

Palo Alto, and probably others firewalls will offer it, has a feature to do malware analysis in a separate (cloud-based) process that does not impact stream processing. What I would like which risks ...
4
votes
2answers
1k views

How can NSA implants and backdoors be detected? [closed]

It has been a while now since the Snowden revelations of various NSA malware and backdoors. For instance: March 12, 2014: NSA has developed implants to take over targeted computers’ microphones ...