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

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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 ...
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4answers
176 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 ...
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2answers
69 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 ...
70
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2answers
9k views

Can a rogue .wmv file “hijack” Windows Media Player?

I've downloaded a .wmv file using P2P. Attempting to play it with Media Player Classic (K-Lite Codec Pack) only gave me a green square in the playback window: I noticed that the video came with a ...
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1answer
107 views

Can malware infect more than one operating system?

Is is possible for malware to be written in a low-level language such as C or C++ and do the following: Infect a single operating systems(such as Windows) Detect other machines on the same network ...
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1answer
77 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 ...
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0answers
59 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 ...
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3answers
198 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 ...
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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 ...
7
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0answers
66 views

Computer Virus Phylogenies algorithms - pseudocode?

I've collected a large number of "Web Shell by oRb" (a.k.a. "FilesMan" backdoor, a.k.a. antichat backdoor) files by running a WordPress honeypot, and searching pastebin. The code in the variants is ...
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0answers
23 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 ...
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8answers
207 views

Difference between virus and trojan?

To my current understanding: a virus is a program that does not self replicate and relies on the host file being spread, it has malicious intent. A trojan is a program that is run be deceiving the ...
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2answers
183 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 ...
2
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0answers
98 views

How to scan large .bin files for malware?

I know about websites like VirusTotal, and programs like herdprotect. I'm using Avira and Superantispyware, but once the large bin files are scanned, usually nothing is found. But after running an ...
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2answers
72 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
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3answers
192 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
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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 ...
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2answers
577 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 ...
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4answers
11k 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 ...
2
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2answers
145 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?
126
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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, ...
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2answers
207 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. ...
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0answers
94 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 ...
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7answers
17k 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 ...
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2answers
51 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 ...
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5answers
1k 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 ...
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4answers
4k views

Suspicious JavaScript in website header

I am not sure if this is the correct place to ask a questions such as this, apologies if it isn't. I have found the below code in the header of one of my wordPress websites, I am pretty sure it is ...
4
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3answers
197 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 ...
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1answer
41 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 ...
9
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6answers
996 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
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2answers
190 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 ...
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4answers
1k views

Detecting malware hidden in P2P traffic

Consider a network situation involving (only) Peer to Peer traffic in medium sized network. For the sake of convenience, a simple P2P application like DC++ may be assumed, although I am aiming at a ...
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1answer
3k views

Uploading images safe of XSS, php code and virus

I know that my question has been responded lot of times, but most the responses addresses functions that I don't even use (like use include with images) and that makes me worry because maybe I'm not ...
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1answer
596 views

Prevent CryptoLocker on Server

A quick question, which may have a not-so-quick answer - Are there any ways to prevent files associated with CryptoLocker, to be propagated to a data server, by means of a back up? We use Cobian as ...
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5answers
1k 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?
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1answer
254 views

I have a virus in my USB drive. I haven't inserted it on my PC yet. How should I proceed?

I plugged the USB drive on a public computer at my university and all the files became .exe Is there a way to clean it without risking that it will copy the virus as soon as I insert the thing?
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5answers
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Can my mouse have virus and infect other machines?

This is my mouse. I used it with my old computer which was full of viruses. If I use this mouse for my new PC, can my new computer be infected from my mouse?
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2answers
108 views

Media players (vlc, spotify and windows media player) don't work after a virus attack [closed]

I just got attacked by a couple of viruses while my laptop was completely unprotected. I installed the necessary programs and tried to get most of the symptoms to go away. I also think I deleted most ...
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1answer
935 views

PHP mallware attack [duplicate]

I'm desprate because my site has been attacked by some malware that adds code below on every php files. I tried to edit and chmod the infected file but its coming back. Scanning with ClamAV found ...
3
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2answers
251 views

How do I remove disorderstatus.ru virus? Prevent reinfection? Make sure there is no (BIOS) rootkit left?

I have recently had two PCs infected with disorderstatus.ru / differentia.ru, by plugging an infected pendrive. From Google searches, it appears that it is a recent virus, or at least with recent ...
3
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1answer
87 views

Pendrive rootkited?

I need some help here. I have an infected pendrive (unknown virus), what this virus is doing is just move my files to a hidden folder (.Trashes) and make links to those files (Actually the links ...
15
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4answers
2k views

How is a worm different from a virus?

In spite of various online articles, I'm a bit unclear on the distinction between a "worm" and a "virus". Two related questions-- Is there a useful and clear distinction here or no? If so, what is ...
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1answer
46 views

Virus that scans hard drive for utility bill + ID? [closed]

Is it possible a virus or malware could scan a hard drive to find ID documents etc and upload them? Randomly some old files were re-uploaded to Dropbox without any updates to them or modifications. ...
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2answers
167 views

Many suspicious requests are going from my browser whenever open any site

Whenever I open any site there are so many suspicious request are shown in my network panel of browser. I scan my system with many antiviruses too, but still facing the same issue. And sometimes I ...
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1answer
92 views

Possible sources of repeated Adware infections

In the last couple of months I have had the same thing happen on separate occasions to two Android phones, a Mac laptop and a Windows desktop computer. In all cases, something infects Chrome making ...
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1answer
65 views

Is it safe to keep a virus' binary code on your local machine?

Is it safe to keep a file containing the virus (binary?) code on your local machine without executing it? I am testing my application against malicious file uploads and and wondering if it's safe to ...
0
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1answer
92 views

what is the most secure hash for virus definition databases in 2015?

I have been told, if I wanted to create virus signatures from infected files to use for detection in the future, I should be careful as some of them are prone to collision attacks?
3
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2answers
203 views

My IP address switched suddenly and then switched back

Sometimes I look at the login history of my blog account (a Tumblr blog) to make sure no one else is logging in (because I have private posts that I want to keep private). Even though today I ...
5
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2answers
221 views

How do you know if the bios has been compromised?

To secure my PC I have setup a BIOS password, preventing any access from a live-cd. Recently I've noticed that when the BIOS asks for my password, I just have to press Enter to boot. It doesn't work ...
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1answer
169 views

Command & Control Server List [duplicate]

I recently got an email from my ISP saying that they'd detected traffic to a known Command & Control server from my home. Boo. I'm sure this probably means one of our computers has some awful ...