A computer virus is a program or piece of code that tends to be malicious and is loaded onto your computer without your knowledge and runs against your wishes.

learn more… | top users | synonyms (1)

4
votes
4answers
519 views

Can you use two hardware firewalls?

There is a rule that says "don't use/install more than one firewalls on one computer " (software firewalls to be exact) which means if you have a network and it has five computers you can only install/...
3
votes
1answer
594 views

Cryptowall files found, but nothing encrypted

I've got a weird situation here and wanted to see if anyone else has run across this. Windows Security Essentials found Cryptowall on a system here and was able to remove the trojan that causes drops ...
3
votes
1answer
91 views

How To Remove Possible Virus Files

See the original question. Using both AutoRun, where I disabled anything that wasn't verified or highlighted (that seemed suspicious), I looked at Process Explorer and found the above unverified. In ...
1
vote
1answer
144 views

Do I Have A Virus (and What To Do)? [closed]

Background: Windows 8, not a special edition. Windows Defender and Webroot are both installed and have been installed for over a month. Yesterday I got a weird error that I've never seen before that ...
4
votes
3answers
957 views

What do I do, I got a virus warning on a webpage

I went to the web address (hxxp://www.asanka.com) (WARNING: BE CAREFUL WHEN VISITING) on Safari, then suddenly I got a warning message [image below] What do I do? I'm freaked out. I have a lot of ...
3
votes
3answers
127 views

Can Chrome sync be infected?

Can Chrome sync be infected by malware? I cannot imagine how, but a particular unproven example that comes in mind is to change the "preferences", so that a malicious proxy server is added. Another ...
67
votes
6answers
38k views

Should I get an antivirus for Ubuntu?

Considering the recent thread regarding anti-virus for the Mac I wonder how many of the arguments put forth are relevant today to Linux systems, specifically Ubuntu. There are no known Ubuntu ...
11
votes
1answer
190 views

Microsoft Word protected view - is it secure enough to protect users?

We had a user receive an email with what appears to be a Word Doc virus and it wanted them to open the file and enable editing. If they did not enable editing but merely opened the file, should we be ...
5
votes
2answers
120 views

Can malicious software be installed inside Linux swap partition?

Is it possible for a virus of any kind to be installed inside Linux swap partition? If so, could it be transferred to the system even after formatting the Linux partition only and reinstalling the OS (...
2
votes
3answers
108 views

Methods to have multiple Anti Virus installed on one machine

I am running Windows 8.1 Pro, Ideally I would like to have the top 5 Anti Virus installed but I am aware it is not advised as they can clash with each other. I was wondering if there is a favoured ...
-1
votes
1answer
51 views

User information changing for online school site only

My son goes to online school. Our user name, password, email and security question keeps changing. Tech support is saying I have a hacker in my network. I have checked and changed all passwords for ...
2
votes
0answers
87 views

Linux machine continuously transferring data over the network to random servers in china and across the globe [duplicate]

I have been using Linux for about 5 years now but I am not very skilled with the commands to monitor and figure out internal issues. I recently was having trouble with the Internet. My roommates were ...
3
votes
3answers
115 views

Detect trojan/keylogger/virus on a businees network

On a business computer network with around 50 computers, there is a computer infected. We need to find that and remove it. I have been running the software below in the suspicious computers, but ...
1
vote
1answer
50 views

Terminology involving malware/virus/worm [duplicate]

What is the difference between "worms", "viruses", and "malware"? Some sources I've found said both viruses and worms infect files. But others say worms are stand alone programs, and are ...
11
votes
5answers
2k views

Can autoplay USB stick spread virus to windows 8 or 10?

Autoplay was a security hole on older versions of Windows, but can I trust newer version like Windows 8 or 10 to insert USB stick without turning autoplay off?
27
votes
4answers
2k views

Are anti-virus companies companies regularly committing software piracy?

As Mikko Hypponen highlighted in a recent tweet, anti-Virus companies collect and store both samples of malicious software and samples of legitimate software: This got me to thinking, what ...
4
votes
2answers
548 views

Can a virus infect source code files with dangerous data?

If a user was infected with a file altering virus is it possible that checked in code (files containing text) to the source control could contain dangerous properties. I ask this after this got me ...
1
vote
1answer
413 views

How to check my application passes multiple virus scanners

I have an application I am trying to bring to market and I want to ensure that nothing in it is picked up by a virus scanner (since that would reflect badly on me). Since I only have a single scanner ...
1
vote
4answers
108 views

What are cookies and cache?

While surfing on the Internet, I am often afraid that I may have downloaded some malware program along with some files on my computer. Furthermore, I have been told that the reason for that are ...
4
votes
2answers
599 views

Possible to detect an/or shut off CryptoLocker by limiting total network bytes transferred?

Since a virus infected PC has to download (encrypt) reupload the entire file (to a file server), and repeat the process for every network drive, is is possible to detect this unusually high bandwidth ...
5
votes
3answers
202 views

Best practice for home router configuration

Having read about the large number of routers infected by Wifatch, I've realised I don't know how to check whether my router has been infected with this or more malicious malware or what I'd do about ...
1
vote
2answers
532 views

How to find why so many host are talking to an IP which is blacklisted

In my SIEM tool, I got multiple alerts for communication with malware sites from Palo Alto firewall. I have seen many outbound communications from internal IPs toward IP: 74.217.31.51 having host name:...
3
votes
2answers
200 views

Decoding injected PHP malicious code in my server

I've found on internet similar issues, and I compared the code. This one is different. I recently found out that the CentOS LAMP webserver we use for development in our office was infected by a piece ...
0
votes
1answer
73 views

Malicious .scr file partially executed: sohanad?

I executed a .scr file, (without prior checking of the file ending, because the filename was longer than what the explorer showed) and there was a popup saying something. Instant realization that I ...
0
votes
1answer
244 views

How do hackers find vulnerability? [closed]

Is it a rigorous trail and error exercise or do they actually read the whole code to "think" about it to find the vulnerable point?
0
votes
2answers
305 views

Virus (or Trojan) in Android

Definition of virus is (from Wikipedia): A computer virus is a malware program that, when executed, replicates by inserting copies of itself (possibly modified) into other computer programs, data ...
3
votes
4answers
260 views

How Likely Is It For A Virus To Spread From A Linux VM To The Windows Host

I'm currently running Windows 10, and I plan to use a Linux distro to run in a VM (Virtual Box). I know Linux is one of the most secure operating systems there is and I'm curious as to how likely it ...
-5
votes
2answers
133 views

Huge virus problem on Acer computer [closed]

Im helping a friend fix a computer, and the problem is(other than the most amount of viruses i have ever seen) that the computer shuts down for no reason. So i found a program called "Snap.do". it is ...
0
votes
1answer
106 views

Strange browsing problem, unknown images

When I open any site, I sometimes see unknown images replacing the original images on the website. They are not ads and can't be clicked. Just random images of people, cartoons etc. When I refresh ...
0
votes
0answers
115 views

Avast Sandbox Waking Computer from Sleep in Windows 10. Avast 2016 premium version

I typed in powercfg /lastwake into cmd and it told me an avast sandbox .exe had woken the computer. I've disabled sandbox and it no longer constantly wakes from sleep - within 30 seconds. I scanned it ...
5
votes
3answers
378 views

How do professional hackers to test their own malwares/viruses without harming their own computer?

Yesterday I started some hacking tutorials on http://xeushack.com/tutorials/ by curiosity. I used the Android app to read the different articles about different ways of "hacking". The author clearly ...
7
votes
5answers
1k views

Is it possible to be a hacker without being a criminal?

I am interested in information security, and I want to be a "hacker." I want to write hacking tools, make viruses, and other stuff... For me, programming botnets are a lot of fun, but how can ...
0
votes
0answers
25 views

Is it possible to avoid “eXecute Disable bit” and “Data Execution Prevention” protections?

I argued with a friend about computer viruses. I mean classic computer viruses, which inject their code into host program and execute before/after/inside host program. Not macro viruses, nor Trojan ...
1
vote
2answers
208 views

Is Linux getting less or more secure? [closed]

The famous so-called virus-and-hacker-free Mac is a thing of the past: As it gets more popular it gets more vulnerabilities. Will Linux be the same at some point in time? Is it getting less of more ...
-1
votes
2answers
86 views

Do you know a harmless exe file that copies itself into a file?

I'm doing a simple project where I read an exe file and if I find a virus that I already know, I erase it from the file. I have to test it with a virus (I'm looking for something harmless) that insert ...
0
votes
3answers
267 views

Most secure way to isolate computer on network

I handle personal client information. Stuff that shouldn't get lost. Because of this, I have had to be careful not to download or install anything that is in any way uncertain. One data stealing virus ...
4
votes
3answers
169 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 ...
11
votes
2answers
1k views

Does Android have sufficient app sandboxing?

In a previous question in InfoSec, I asked about how to determine the safety of a sideloaded Android app that requires root permissions. Now I would like to ask a related, but different question: Is ...
15
votes
4answers
13k views

What does this javascript file do? Is this a virus?

While searching on Google I found a website that shows one set of content to the Google Bot and an other to users (by redirecting to a new domain), and also a very suspicious Javascript file. Maybe it'...
1
vote
2answers
265 views

Can Antivirus scan office and PDF file types?

I know antivirus software (like Kaspersky) can scan executable files for viruses, but can they scan office documents and PDF files for viruses?
133
votes
5answers
16k views

How can USB sticks be dangerous?

We all know the story of the USB drive left outside a power plant which was found by a worker and inserted into a computer to see the contents which then allowed a hack to ensue. Here is my question, ...
0
votes
2answers
284 views

Why should I add a certificate to “Trusted Root Certification Authorities”?

I want to use a programm, which lets me modify touchpad gestures. http://www.multiswipe.com/faq But I need to add their certificate ( see in FAQ [ How to install MultiSwipe? ] ) to make it work. ...
1
vote
0answers
112 views

What vulnerability is this malicious document attempting to exploit

CLARIFICATION: I changed the title as people were interpreting this as a request to help understand the code. I explain what the code is doing below (critiques on this analysis are welcome.) I am ...
9
votes
7answers
18k 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 ...
1
vote
2answers
55 views

About browsers injectors (Sonic Train)

I know that viruses use some ways to inject some ADs in the browsers web pages like : 1-Inject an extension 2-Inject some codes to the browser process 3-With a proxy server 4-Install an injected ...
3
votes
5answers
2k views

Can any dangerous file(Virus, Trojan, Malware, etc) cause harm inside a zip or rar?

I am using Windows 8.1 pro with Mozilla Thunderbird for my email requirements. I have my Thunderbird set to auto download all email attachments, however upon runnning a Virus scan I am seeing many ....
3
votes
3answers
224 views

How can one execute code upon entry of folder in Windows?

Theoretical question, I'm just interested in how could this be done. I remember I had a virus on Windows7/8 (can't quite remember which one tho) which made Windows BSOD upon entry of a folder which ...
1
vote
1answer
49 views

Techniques exclusive to my malicious version of my own benign program?

Do any special techniques become available to me when writing the malicious version of a program, when I myself am also the person programming the legitimate program? (Any measure I could take with ...
10
votes
6answers
1k 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 ...
5
votes
2answers
255 views

Is it possible to infect an e-mail by accident?

Sometimes, my friends send me e-mails. I know that they don't care that much about computer security (while I care). I know that they don't know how to create an infected e-mail (no reason for doing ...