Questions relating to malicious software

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166
votes
24answers
98k views

Do I need to have 'antivirus software' installed? [closed]

I thought that there was no need to scan for viruses either in Ubuntu or any Linux distros until I found virus scanner packages 'clamtk' and 'klamav' in Ubuntu software center yesterday. This leads ...
89
votes
1answer
203k views

How do I scan for viruses with ClamAV?

I installed ClamAV via Terminal (Ctrl+Alt+T) with: sudo apt-get install clamav but how can I scan for viruses?
46
votes
11answers
15k views

Can a Windows virus transfer to Ubuntu?

Before I removed Windows 7 from my computer and replaced it with Ubuntu, I had over 257 threats that never would go away. I don't know if the trojan horse I had also could transfer over to Ubuntu. Can ...
40
votes
7answers
12k views

What is the Ubuntu “built in virus protection”?

At ubuntu.com there is this "only in ubuntu" that says "Built in virus protection": What is the Ubuntu built it protection? What is the program in charge of this and how does it work?
40
votes
3answers
1k views

Is there any guarantee that software from Launchpad PPAs is free from viruses and backdoor threats?

As Linux continues to grow and develop, and the more we use Linux, the greater the threat from viruses. We also know that a virus/threat in Linux (if any) would have difficulty running or spreading ...
36
votes
3answers
10k views

Do Wine Viruses only work while Wine is running?

I heard Linux can get viruses through Wine,and I was curious if the viruses work only while Wine is running. In other words, could I stop a virus from doing it's thing by just quitting Wine?
33
votes
5answers
10k views

What if I run a virus/trojan Windows EXE on Ubuntu with Wine?

I've got a file said to contain information I was looking for. Unfortunately it is an executable instead of DOC (as it was meant to be) and the site I've download it from looks suspicious for me. If I ...
28
votes
5answers
70k views

How do I clear everything (data, viruses) from a thumbdrive?

Say I used some thumbdrive on a public Windows computer and I copy some data to my Ubuntu computer with it. I cannot be completely sure that the Windows computer was clean, and it might have put ...
22
votes
8answers
5k views

Where can I look for malware that may have been installed on my machine?

I want to analyze my ubuntu box to detect if it was been hacked. My question is: what are all the place where to look to discover if some malicious software are started ? The following is some kind of ...
19
votes
7answers
8k views

Redirecting to “http://domain-error.com”

I am being redirected to the website "http://domain-error.com". This is happening in Firefox, Chromium, Google chrome etc. I feel I am attacked by a virus or something similar to that. Update: the ...
17
votes
1answer
3k views

Unexpected Arabic messages below mouse pointer in LibreOffice - a virus?

This is weird. Today I opened an excel file with LibreOffice. Suddenly I saw the mouse changed color, and stuck to it was a message in Arabic, which changed every second in a loop. I can actually ...
17
votes
1answer
2k views

Should I be concerned about the Linux.Darlloz worm?

As an Ubuntu user, any tips on how Linux.Darlloz could affect Ubuntu and ways to prevent it?
16
votes
2answers
4k views

Remove RECYCLER directory from virus infected flash drive

Before you advise me on the option of saving my files and formatting the drive using gparted, please understand that I could have done that hours back and that would have taken only a few minutes. ...
16
votes
5answers
19k views

How to detect and remove a Linux trojan?

I recently (re)stumbled upon this: Linux Trojan Goes Unnoticed For Almost A Year (Unreal IRCd) Yes, I know that adding some random PPA/software from an untrusted source is asking for trouble (or ...
14
votes
3answers
3k views

Ubuntu vulnerable to malware sites?

I just browsed a site a while ago that was flagged as an "attack site" or has malware, but Firefox didn't warn before I went into it. Only when I opened a new tab with another page from the site did ...
12
votes
1answer
834 views

How to deal with malware on my laptop?

I am fairly certain that my Ubuntu 13.10 laptop is infected with some sort of malware. Every once in a while, I find a process /lib/sshd (owned by root) running and consuming lots of cpu. It is not ...
8
votes
2answers
1k views

An exe file that I want to run on linux made for windows comes up as a Trojan on VirusTotal - how would I run it without it affecting my system?

Is there any way that I can run this program on my Linux system without possibly getting a virus?
7
votes
2answers
617 views

Is there a virus scanner for scanning Windows files?

I use Ubuntu as a file server, is there a virus scanner on Ubuntu for scanning Windows files? Since most of the files are saved on the server, this greatly help minimize the spread of viruses. Thanks!...
7
votes
1answer
962 views

Will a Virus or Malware inside a User Account or Guest Account Affect the Entire Ubuntu System?

When I started out with Linux, and while studying the file structure and access permissions of Linux systems, a thought formulated in my mind, that as long as you operate only within your less ...
7
votes
6answers
9k views

Popup ad virus on both chrome and firefox

A pop-up ad box appears whatever site I am opening. Tried resetting settings, disabling extensions, removing all users on chrome. It seems it is not about chrome since same thing happens on Firefox ...
7
votes
3answers
1k views

Ubuntu installed alongside an infected Windows system

My antivirus scan has found something on Windows 7. No information yet what it is. However I was thinking of installing Ubuntu alongside Windows. Could that be dangerous in terms of Ubuntu catching ...
7
votes
5answers
898 views

Will a Ubuntu LiveCD be affected by a BIOS virus?

If I boot from Ubuntu DVD I notice that there are two options: Run from DVD without installing it. Install Ubuntu. My question is, If the PC has a BIOS virus and the first option is chosen — ...
6
votes
6answers
15k views

watchdog/0 process using all my CPU suddenly

I have a fresh installation of Ubuntu 12.04, I have been running it for about a week. Suddenly today I noticed my computer freezes every 5 seconds. I restarted the computer and I still get this. I ...
6
votes
2answers
1k views

Where should I start in tracking down Firefox malware

Switched my sister to Ubuntu because I got tired of re-installing the other OS every 6 months. Now she managed to get some malware in her Firefox on Ubuntu. Without access to the computer (or when I ...
6
votes
1answer
3k views

How to check if my system is infected with the “Turla” trojan?

As many have heard/read the news, a module of the state-sponsored trojan malware named "Turla" was recently discovered which infects Linux hosts: (News from ArsTechnica) (News from OMG-Ubuntu) (...
5
votes
3answers
14k views

Why aren't viruses an issue? [duplicate]

Possible Duplicate: Do I need to have antivirus software installed on a Linux distro? I'm using ubuntu right now and I think it's really good. Really. But I'm wondering about viruses. I ...
5
votes
2answers
4k views

Could Autorun Virus, affect my PC via Wine?

I have installed wine and i am afraid that viruses will affect my PC now. I will not open any other .exe file other than mine one (which i use everyday)
5
votes
1answer
504 views

Is Java installed by default?

I'm asking this because Libre Office was pre-installed and some of it's features require Java. I don't want Java because of a malicious remote administration tool (RAT) called jRAT and there are also ...
5
votes
3answers
6k views

ClamAV: PUA.Win.Exploit.CVE_2012_0110 FOUND (/usr/share/mime/mime.cache)

I recently scanned my system with (I am running the latest version of ClamAV and my definitions are up-to-date): sudo clamscan -r --detect-pua --infected --bell / And this one was of the results: /...
5
votes
3answers
751 views

Can a virus spread through DOSBox in Ubuntu?

I have a virus in several DOSBox msdos games. It doesn't seem to be affecting the Ubuntu files, but is spreading amongst my dosfiles that were opened in DOSBox. I don't know how to control this in the ...
5
votes
1answer
408 views

LibreOffice Writer edited document is recognized as virus or spyware

I got MS word document, person asked me to edit it, to add table of contents, to add page numbers, because she doesn't know how to do in MS Office. So I did with LibreOffice writer. But when I saved (...
4
votes
3answers
1k views

ClamAV detects certain files on the PlayOnLinux directory as malware, should I be concerned?

ClamAv found 50 viruses on my computer, mostly associated with PlayOnLinux. Is this normal? Is it a significant risk? Should I be concerned? How do I learn more about these viruses so I can judge ...
4
votes
2answers
2k views

How (in)vulnerable would Ubuntu be to encryption ransomware?

Edit: This is different from the suggested duplicate. The suggested duplicate is about viruses and antivirus in general. This question is specifically about encryption ransomware, how it can run, and ...
4
votes
4answers
10k views

Is it risky to download a script with a http://goo.gl/ link?

Following the advise of an answer in Ask Ubuntu, I downloaded and ran a script with a URL starting by http://goo.gl/ Is it risky to use such file? could it be a virus or something else? If yes, what ...
4
votes
3answers
1k views

Did I Somehow Get Infected with Spyware or Virus?

So I Was trying to Install Ubuntu restricted Extras, and well this poped up in the terminal. www.actingcareersnow.comCasting Calls For Kids & Teens. Audition Now! Ages 9 to 29. [1] 3241 ...
4
votes
2answers
171 views

Strange window popping on Gnome

A couple of days ago, when I came back to my computer after a couple of hours, the following window was on my desktop: The title bar said "gnome-screensaver-dialog". That's it. I just clicked OK, ...
4
votes
2answers
3k views

Hand of Thief malware?

Anyone know anything about the Hand of Thief malware that has been announced for sale on an apparent underground cyber crime forum? It is said that is has been tested to work on Ubuntu! Should I be ...
4
votes
8answers
1k views

A adware has infected 2 browsers

A weird adware is popping up every time I open a .com website and shows ad or redirects the page. In chrome, I'm not even able to open an ordinary .com page because it immediately redirects to ...
4
votes
4answers
5k views

remove youradexchange malware from chrome

Does anyone have experience removing the 'youradexchange.com' browser hijack on ubuntu? I find a lot of information regarding this for Windows, but there is nothing for linux. When I am using Chrome, ...
4
votes
3answers
8k views

“Successful su for user by root” - suspicious entries in my /var/log/auth.log?

This post on reddit made me go through my logs. That's when I discovered the following entries which appeared on two non-subsequent days. "user" is my user account. Aug 4 22:50:37 UbuntuSystem sudo: ...
4
votes
2answers
1k views

What additional security measures should I apply for Ubuntu?

So on my Windows 7 install, I've got multiple free malware/virus scanners and a firewall up. But I've heard that Ubuntu (or Linux in general) is much more secure by default. So what additional ...
4
votes
3answers
10k views

remove pop up ad from ads.matte.com malware from ubuntu!

A malware pops up http://ad.adsmatte.com/<random string> and annoys me every time i click on a link. It has also denied me access to youtube. The youtube page is completly disoriented and doesnt ...
4
votes
1answer
8k views

How to get rid of the DNS Unlocker adware?

From this morning I'm witnessing unfamiliar ads apearing in different pages while using Firefox which they say "Ads by DNSUnlocker". I searched for it and it seems this is a known adware infecting ...
4
votes
1answer
3k views

Virus detected with ClamTK (Possible infection?) [duplicate]

I did a routine scan of my system, with ClamTK. The the anti-virus reported 3 detections. The names of the three detections are: 1.[PUA.Phishing.Bank] 2.[PUA.Phishing.Bank] 3.[PUA.Script.Packed-1] ...
4
votes
0answers
294 views

Are Virus/rootkits via ubuntu updates possible? [duplicate]

Possible Duplicate: How is the system kept secure? What security policies exist in place for packages and scripts? I fear that just like on Windows there might be ways to catch a malware/...
4
votes
3answers
151 views

Windows Virus in Ubuntu

I used my USB to transfer files from our library computer in school to my netbook (which is running on Ubuntu). Next, I used my father's USB to transfer another file from my netbook to his Ubuntu ...
3
votes
1answer
374 views

How do I disinfect Ubuntu that is running a virus?

My 12.04 system has just been infected with a virus and it is self-replicating a load of rubbish directories in the /proc/ area. This may crash my computer completely soon. I cannot delete any of ...
3
votes
3answers
2k views

What do sapd, skysapd, sksapd, and ksapd do?

Does anyone know what sapd, skysapd, sksapd, ksapd do? Are they viruses? I tried clamav it didn't recognized them as viruses. I also realized that my /etc/rc.local has multiple copies of this: ...