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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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 ...
126
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, ...
21
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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
votes
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 ...
1
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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 ...
2
votes
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 ...
5
votes
2answers
187 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 ...
5
votes
3answers
164 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 ...
0
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2answers
107 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
921 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
votes
1answer
82 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 ...
61
votes
5answers
15k 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?
1
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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?
3
votes
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 ...
0
votes
0answers
589 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 ...
-3
votes
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. ...
0
votes
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 ...
1
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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 ...
1
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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
votes
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?
6
votes
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 ...
3
votes
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 ...
0
votes
3answers
950 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 ...
5
votes
2answers
220 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 ...
0
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1answer
162 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 ...
2
votes
1answer
520 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 ...
0
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1answer
216 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
votes
2answers
131 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 ...
2
votes
1answer
451 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 ...
-2
votes
1answer
54 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 ...
0
votes
2answers
123 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 ...
1
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3answers
237 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 ...
0
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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
votes
2answers
139 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 ...
1
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1answer
159 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; { ...
34
votes
5answers
3k 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? ...
3
votes
3answers
638 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
193 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 ...
1
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0answers
28 views

Pop ups after adware removal [closed]

I have a user who had a program called "Shopshop" running on his system that would cause page redirecting when using Chrome, IE, etc. I was able to remove the infection and extensions and ran AV and ...
3
votes
3answers
117 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 ...
3
votes
2answers
107 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 ...
1
vote
0answers
80 views

How to deal with virus causing massive startup delay? [closed]

I have an SSD and normally startup only takes seconds. However recently my PandaSecurity said it detected a virus and needed to restart to purge it. When I allowed the computer to restart, the ...
1
vote
2answers
444 views

How effective is antivirus software? [duplicate]

On one hand, most antivirus websites claim their products are highly effective, and I've seen antivirus "test" videos claiming 95%+ detection rates for new malware (as in less than a day old, not old ...
3
votes
1answer
525 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 ...
1
vote
3answers
258 views

How to get started as a Malware Analyst? [closed]

Sorry if this is posted in the wrong section. A little about me: I'm going to be a sophomore in the fall at university, my major is Computer Science (Information Assurance). I've been interested in ...
1
vote
2answers
150 views

Is there a online filter to check email attachments?

I've just received an email from an old employer. There is very little information in the message sent just: See attached file for your review. Kind regards, Mick with an attachment. I ...
0
votes
2answers
427 views

Can VPNs prevent information from being stolen by keyloggers screen readers?

What role, if any, do VPNs play in preventing information being stolen by keyloggers and mouse/screen readers? Here's my thought process: Even if malicious software is present on your device, for ...
1
vote
2answers
575 views

how to detect an encrypted virus

a virus code (x bytes long) is XORed with a x bytes long word (we call this T). This word T is built repeating multiple times a 8 byte secret key. the infected file contains this XORed (obfuscated) ...
10
votes
1answer
234 views

Virus attached or included in VST(i) Plugin

VST Plugins are DLL files available to be put into a folder in the Music Tool which then can use this as a plugin. Does VST have a mechanism not to execute malicious code inside the dll file? Can I ...
1
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2answers
77 views

Potential worm damage on a physically isolated Tor system

I'm setting up a physically isolated Tor system (with one computer serving as the workstation and another as a Tor gateway), and I'm concerned about methods a worm could use to infect my OS. In the ...