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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1answer
9 views

How to make undetectable malware

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 ...
12
votes
3answers
6k 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 ...
12
votes
3answers
272 views
+100

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 ...
1
vote
1answer
95 views

Securely erasing USB flash drives from a bootable media

My question refers to securely erasing viruses from the usb flash drives, including the MBR, in case there is one. I was thinking of booting with Linux from a closed CD-R (a cd rather than USB flash ...
3
votes
3answers
3k views

CryptoWall 3 - how to prevent and how to decrypt?

My father's computer is now infected with CryptoWall 3, according to the link below. http://www.bleepingcomputer.com/virus-removal/cryptowall-ransomware-information#CryptoWall Is there a way to ...
1
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2answers
904 views

CloudFlare - prompted for “attention required”

I am getting a CloudFlare - attention required / security check prompt on most of the sites I visit through my Macbook running OS X Yosemite, these sites work perfectly on other devices (such as iPad, ...
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
226 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
0answers
31 views

List of Phishing, Virus(ed), Malware Sites For An Anti-Spam Site [closed]

I'm looking for a list or database of phishing, full of viruses and malware sites which I can use to test the credibility of my current project I'm working on. Any source where I can find bad, ...
0
votes
3answers
78 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
68 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 ...
1
vote
2answers
33 views

Determining safety of Android APK executable

On my request, a developer gave me a new version of his Android app to test. The app requires root permissions. I do not know the developer personally. I have no specific reasons to trust or ...
3
votes
3answers
83 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
127 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 ...
1
vote
2answers
256 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
64 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), ...
-5
votes
1answer
81 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
3k 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] ...
0
votes
1answer
171 views

SSH scan against D-Link routers: is there a (new) exploit?

TL;DR if you have a D-Link router perhaps it wouldn't be a bad idea to check its SSH settings and/or username/passwords. I am a long-time user of fail2ban on several machines, almost all Ubuntu 12 ...
5
votes
4answers
600 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 ...
22
votes
4answers
5k 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 ...
12
votes
8answers
4k views

Can malware be attached to an image?

I have a small number of employees who use a company computer but these people aren't very tech savvy. They use an email client and a messaging client. I'm pretty sure they wouldn't click on .exe or ...
1
vote
2answers
58 views

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

I wanted to convert a youtube video to mp3, but the website gaved me an EXE? ...
3
votes
3answers
2k 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 ...
6
votes
5answers
5k views

Is it worth it to get paid anti-virus software?

With the rise in cybercrime, I am slightly worried about my computer security. I have been using open sourced anti-virus AVG for years and it has been doing well. Are anti-virus software like Norton ...
0
votes
5answers
161 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
51 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
74 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
78 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 ...
10
votes
5answers
257 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 ...
4
votes
6answers
3k views

Why do some antivirus programs find infections that others miss?

I have Avast Free antivirus on my Windows 7 PC and yesterday I used Bit Defender quick scan addons, which spotted a virus. In rechecking with Avast, it didn't pick it up. In scanning my system with ...
1
vote
0answers
39 views

Are old Android OS's a risk to Activesync email, and how do I block old devices?

I'm concerned that old versions of Android may be hacked through unpatched WebViews (in PhoneGap and other apps), exposing Activesync email data, and other sensitive information. To mitigate this, ...
2
votes
4answers
153 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 ...
19
votes
3answers
4k views

How can I tell if I have the citadel virus without downloading an antivirus?

I recently received an e-mail from Virgin Media indicating that I might have the Citadel virus. It obviously sounds like a fake e-mail, but I am almost certain it is genuine, as they had my name and ...
3
votes
1answer
162 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
1answer
206 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 ...
6
votes
3answers
2k 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
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1answer
380 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 ...
3
votes
4answers
127 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
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2answers
132 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
431 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 ...
41
votes
8answers
9k 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
56 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 ...
0
votes
0answers
62 views

Which antivirus scanners detect malicious files like image files / text files that seem harmless? until double clicked?

I'm on win7 64bit, and I just found out that you can embed scripting data into images and plain text files where it would run the cmd.exe file to execute other scripts. What type of antivirus scanners ...
1
vote
2answers
78 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 ...
9
votes
6answers
8k views

how to protect my USB stick from Viruses

I repair a lot of computers with viruses, malware, and what not, and I have one problem that I am struggling to find a solution for. Whenever I connect my USB stick that has the tools I need for the ...
1
vote
3answers
151 views

Removing a Redirect Virus from Fedora Linux

Despite several attempts listed below certain websites are getting redirected to a certain ad website automatically, out of the blue on linux. When some website starts redirecting to this ad website ...
0
votes
1answer
110 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
127 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 ...
-2
votes
1answer
56 views

Old e-mail text types itself back into PC later by itself? [closed]

Occasionally, I'll notice my Win7 PC is typing in text by itself. When I open Notepad leave it, the text being typed in is a snippet of text from an e-mail that I wrote and sent months ago to a friend ...