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.

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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
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5answers
3k 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?
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3answers
763 views

Where Does ClamAV Get Its Virus Signatures?

I see that ClamAV has virus definition files which are mostly hash codes in md5, sha1, and sha256 formats, which either look at the whole file or what are called PE sections of an executable file. Of ...
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2answers
706 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:...
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2answers
212 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 ...
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4answers
119 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 ...
19
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5answers
3k views

Find Virus in an Image File

I just received a .jpg file that I'm almost positive contains a virus, so i have two questions about what I am able to do with the image. My first question originates from the fact that I opened the ...
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1answer
277 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
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1answer
74 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 ...
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4answers
294 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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4answers
545 views

iPad infected with virus (popup - admobinew.com)

This morning I was reading some news on some websites (I think one of them was haaretz.com) using my iPad (ios 9.0.1), I clicked on a news and I was redirected to some dodgy website and I started ...
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2answers
135 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 ...
89
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2answers
20k 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
112 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 ...
7
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2answers
276 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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0answers
126 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
400 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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1answer
133 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
28 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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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 ...
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2answers
212 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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1answer
220 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
91 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
294 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
180 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
283 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?
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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 ...
133
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5answers
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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, ...
22
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4answers
5k 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 ...
3
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3answers
226 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
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 ...
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2answers
56 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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2answers
268 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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3answers
209 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 ...
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2answers
175 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 ...
0
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1answer
2k 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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1answer
112 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 doesn'...
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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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1answer
283 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?
3
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3answers
458 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 ...
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0answers
1k views

Shortcut Virus: All contents of my USB gets transferred into an unnamed hidden folder

Whenever I connect any USB into my PC. All of the contents of my USB gets thrown into a hidden unnamed folder which is getting irritating. I have tried to search online for solutions but none of them ...
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1answer
79 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. ...
0
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2answers
194 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 ...
0
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1answer
131 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
71 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 ...
1
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1answer
104 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?
6
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8answers
324 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 by deceiving the ...
3
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2answers
243 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 ...