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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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
209 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 ...
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1answer
185 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
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 ...
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3answers
268 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 ...
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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 ...
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2answers
266 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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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 ...
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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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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 ...
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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 ...
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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
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 ...
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2answers
256 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
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 ...
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2answers
170 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
1k 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
111 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
18k views

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
280 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
454 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
76 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
191 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
126 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
68 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 ...
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1answer
103 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?
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8answers
315 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 ...
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2answers
234 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 ...
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3answers
1k views

Is mgicinjs.info a virus or malware site? How to get rid of it?

Today, I noticed that almost all of my web project (published or in localhost) have a set of weird script references in their pages: And they are all automatically generated - they don't appear in ...
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2answers
330 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
550 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 ...
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1answer
655 views

What's with the Facebook malware which posts obscene posts in all the groups? [closed]

How to get rid of the Facebook malware which sends pornographic posts in all the groups you belong to? I always made fun of people who became victim of this malware/virus saying they are not cautious ...
2
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1answer
297 views

Does CryptoWall needs a internet connection to encrypt my files?

Does CryptoWall 3.0 use some resource on the internet to encrypt my files? I watched this video on YouTube - in this video a tool is used to sniff network traffic and find information about ...
3
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2answers
207 views

Is it appropriate to block a sender's email address

This morning I received a mail from Apple suspension UK <do_not_reply@apple.co.uk> with the subject Apple "Unauthorised transaction alert". The mail was sent to one of my company's distribution ...
4
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2answers
817 views

Is there any known encrypting ransomware that attacks Macs?

Just about every article I read about Cryptowall, Cryptolocker, and its ilk seems to assume that the reader is running some flavor of Windows. When I Google "ransomware OSX", I get a long list of ...
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1answer
58 views

OS X terminal starts from other device (got rooted?)

I've recently noticed that my terminal starts with something like "android... " even though I don't have any android device. Furthermore I noticed that my macbook only starts with "android..." when it'...
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2answers
157 views

Undetected virus

My PC has contracted a virus. I noticed weird behaviour from my PC, and investigated the matter. I still don't know how I got infected, but the result is someone having administrator access on my PC ...
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3answers
393 views

Large amount of foreign IPs hitting out firewall, is this automated scans or are we under attack?

I just got put in charge of a network. In the logs on our firewall I noticed that we had a large amounts of machines trying to connect to port 53 as well as about a dozen other ports. Are these ...
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1answer
50 views

Procedure of tranmission of original virus [closed]

If website A is having a video with a virus, then if we watch that video through another website B (like dirpy dot com or getaudiofromvideo dot com), is there mechanism for the virus from website A ...
2
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2answers
148 views

Malicious programs that takes advantages of Windows vulnerabilities [closed]

I was wondering if the majority of the viruses and worms are created to exploit vulnerabilities of the Windows system (not a third party app), also I would like to see a report. In Windows a normal ...
0
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1answer
200 views

Malware code in WordPress?

I'm pretty sure that we have malware code in our WordPress website - Here is the code in question, it is located at the top of every php file in the website; { $ua=strtolower($_SERVER["\x48\124\x54\...
37
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5answers
4k views

Can malicious code trigger without the user executing or opening the file?

If a file is downloaded from the Internet, and saved on disk, but is not opened by a user (if we keep autorun off), are there any chances that malicious code (e.g. a virus) in the file could trigger? ...
4
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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 ...
1
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1answer
278 views

Decrypt a file by knowing the original content [duplicate]

We had some ransomware get into our system a couple of weeks ago, and it has encrypted a large amount of our files. I am wondering, is it possible to figure out an encryption key if I know the ...
4
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3answers
167 views

Fiddler show external requests but not initiated by any legitimate process

While debugging my web application in Fiddler, I found out that there are some suspicious requests to some hotel sites, search requests to google.pl. etc. See below images. Strangely there no process ...
4
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2answers
115 views

How to sanitize archive files?

I am looking for a way to make sure that a particular archive file does not contain any sort of malicious code. From time to time new vulnerabilities pop up (e.g. gzip, 7zip) so I though a good idea ...