A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.
3
votes
4answers
440 views
Is it safe to serve any user uploaded file under only white-listed MIME content types?
Let's say I develop an application that,
Allows any user to upload a file of only white listed mime content type and extensions (word and pdf).
Serves those files with the allowed extension and ...
13
votes
4answers
1k views
What is the corrupted image vulnerability? How does it work?
What exactly happens when someone injects malicious binary code into an image file (on Windows)? How is that done?
25
votes
2answers
3k views
What malicious things can happen when clicking on links in email?
I've received a spam from one of my friends (well I'm sure he didn't send it). so there's this link, and i'd thought what exactly would be the implications of clicking the link (i've not clicked it ...
5
votes
2answers
1k views
Viruses on video cards?
Steve Gibson of Security Now fame claims that viruses can attack a video card and infect it. I assume that he means it can infect the Video BIOS. However I'm skeptical. BIOSes are so numerous and ...
13
votes
4answers
11k views
How to inject executable, malicious code into PDF, JPEG, MP3, etc.?
I wanted to know if its generally possible to inject executable code into files like PDFs or JPEGs etc., or must there be some kind of security hole in the application?
And if so, how would one do ...
5
votes
2answers
296 views
What is a Flash drive by download?
I've seen many people saying how some sites can infect your computer without actually clicking anything. They said that it was a "Flash Drive By" and it would use flash to download a file of any kind. ...
3
votes
5answers
708 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 ...
17
votes
6answers
451 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 ...
13
votes
2answers
2k views
How does a crypter for bypass 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?
8
votes
6answers
473 views
What is preventing the widespread common use of MAC-type systems?
Overall question
what is preventing the uptake of MAC systems such as SELinux/AppArmor in corporate and desktop computing environments?
Why don't you think it isn't already widespread?
I do not ...
12
votes
6answers
688 views
Why do malware creators use such clever technologies for such silly purposes?
Some days ago I got infected by a malware, probably something new and very clever, as it went in unstopped and no scanning tool was able to detect it afterwards (see this question).
It was a ...
8
votes
3answers
864 views
Am I protected from USB autorun malware on Windows 7?
As far as I know, the autorun.inf problem (the possibility of automatically executing code when a USB stick is plugged in) was solved through Windows Updates for XP, and on 7 it is no longer possible ...
5
votes
4answers
519 views
Is disabling auto-run enough to protect against malicious code from removable media automatically infecting a machine?
If I block auto-run on a windows machine, is this enough to protect it from malicious code (assuming I don't run any files manually)?
Or are there known vulnerabilities that may cause infection?
5
votes
3answers
200 views
How safe are copies of Firefox that are on various Mozilla mirror sites?
If I end up downloading a .dmg or .exe (depending on OS) installer from some mirror site, how can I be sure that a virus or trojan or spyware has not been added?
I don't see any mechanism for ...
4
votes
5answers
3k views
How can I prevent viruses/malware from infecting my flash drive?
I've a pen drive that I carry to the college lab . It seems all the systems in lab is infected. I need to be able to write to the drive, so I can't simply write protect it.
Everytime I insert a ...
2
votes
2answers
654 views
How to check if a website is sending out a virus?
I'm a webmaster at a company without much knowledge of IT Security. We are running 6 computers connected to a central server that also hosts our website.
3 out of 6 people in the office have gotten ...
-1
votes
1answer
103 views
Would this be plausible for a metamorphic virus? Not repeatedly infecting same system
Would this be plausible for a metamorphic virus? When a new generation (for lack of better word) is created it would hard code a random file name, that would be checked to see if the system was ...
6
votes
5answers
258 views
Windows 2003 Enterprise infected by Conficker; post-infection problems continue
I used various tools to remove Conficker, and I pretty much succeeded, but I've had recurring problems afterward.
It won't update anymore (with the following error message: 0x800706B5)
I tried ...
6
votes
2answers
374 views
How might an email do damage merely by being opened?
E.g. http://www.dailymail.co.uk/sciencetech/article-2094982/Threat-new-virus-infected-emails-PC-DONT-open-attachments.html?ito=feeds-newsxml
Assuming that the user clicks no links and opens no ...
3
votes
2answers
137 views
How to practically detect current system net traffic?
I know that some viruses or trojans can install rootkits or bootkits to change system's normal behaviour; AFAIK for example filter queries for running processes or even hide active TCP ports.
My ...
1
vote
0answers
31 views
vbs agent kz trj [duplicate]
Possible Duplicate:
Index page has been compromised, suspicious files are showing up
I have vbs agent kz trj one my laptop. my httpd.exe and mysql.exe is infected and deleted from Xampp. ...
1
vote
2answers
361 views
AVG Website Scan, Chance of 'Potential Threat'?
In a recent question I asked about investigating websites for viruses.
The answers were very helpful, I ended up using the AVG website scanner. First I used it on our website and found it was clean, ...
