Virus watch - how to tell when your system's infected.

By : Forum Moderator
Published 25th July 2012 |
Read latest comment - 26th July 2012

Yea, 'tis an old subject, but I though that I would share a few of my more memorable experiences when it came to viruses and how I figured out it was time for a scan etc.

Firstly, never believe that an antivirus is perfect and provides total cover for your PC. New viruses are coded everyday and it all is about as fast paced as the IT sector itself. Take a few precautions to help you take care of your PC and data.

1. Don't go to sites that are virus carriers.
Easier said than done, because you can never tell when a site is going to drop a few unexpected packages on you or not. A lot of browsers now days have (Chrome does this more often than not) a system that's used to identify sites that will either attempt to infect you and will block that site immediately and will not allow you to enter it. Some antiviruses do that as well, with Trend Micro being the most finicky. Some antivirus software also have a rating system (avast, avg) and they will show you sites that are safe (green) neutral (grey), or malicious (red). So sticking to the green is always a good idea. Grey is not that bad, but if the browser or antivirus complains, get outta there , also sites that have tons of music to download, software (hint hint), those are some of the more likely suspects.

2. Don't open emails when you don't know who the sender is.

Happened to me once, and the little ( <- insert cuss word there) took over my email, sending spam and virus infected mail all over the place. Most times you get viruses that are so destructive, it infects the boot sector of your harddrive and in the end it leaves you taking it to a techy to get a new one and reinstall all your software.

3. External sources like CD's
A lot of the time, antivirus software gives you the option of scanning something on its own, by right clicking on the file and then choosing to scan it. This is often the best thing to do with a Cd you got from someone, and that includes discs that you get with magazines. You cannot say for sure how good someone else's knowledge about viruses is and whether or not they are protected from viruses.

A few things to look out for:

A) Your system slows down to a crawl, and you have a more processes running in your task manager than there should be. This is easy to see, you just press control alt and delete and it brings up the task manager. When you install new software, just take a note of any extra processes (or screenshot them). When you suspect that you may have a virus, go take a look at the screenshot and compare the two.

B) Your browser opens pages that you have never visited before in your life. it happens. Many browsers actually save the last tabs left open from your last session, which you can disable in the settings of said browser.

C) You get a notification on your computer saying your PC is infected, and proceeds to throw a ton of adverts at you for antivirus software. That's an old one though, but it was one of my funniest.

A virus can be used for a lot of different things, and the most likely is to either turn your computer into another drone where they can then infect more computers, or they can use it to infiltrate your data and take anything they want really, so its important not to keep passwords, banking data, or anything else that is sensitive on a PC.

If you need antivirus protection, go with the names you can trust, that have been around for a long time. Many times an antivirus is written and it looks like it works perfectly, but then its just a shell that is written to protect you from some, and not others (like the ones coded by the same people that created the antivirus).

Thanks,
Dreamraven
Comments
Don't open emails when you don't know who the sender is.

Some of us have to, because that's how we get our business ...

I update my antivirus every day before I go on the web or open my email, scan the computers at least weekly and HOPE.

Linda
CareersPartnershipUK



I meant from junk folders, or ones you aren't sure of that have nothing to do with business.

Thanks,
Dreamraven

Some of us have to, because that's how we get our business ...

As one liners go Linda, that was fantastic

Steve Richardson
Gaffer of My Local Services
My Local Services | Me on LinkedIn

As one liners go Linda, that was fantastic

Lol.

Thanks,
Dreamraven



How much of a risk are the "social" mass mailings (political, charitable, jokes and video clips) plse? I tend to regard them as more risky but open some anyway, because they've been sent by friends.

Linda
CareersPartnershipUK

From what the hacker did to me, I check it all. Most times mail will block content that can harm your PC, but when they post links, you're at the mercy of your browser and antivirus. Best thing to do is check the titles etc. before opening.

Things get so darn tricky these days, it gets harder to know which is real or not. People have their email addresses leaked to all sorts all over the web, and all heck breaks loose. With hackers holding email addresses for ransom (it seriously happens out there), and the like, it scares the bejeebers out of me. Kinda makes me think there are very little real safe areas around online.

Thanks,
Dreamraven

The one that gets me now is my hotmail account, it's a nightmare, I've had it hacked twice!

You then get ropey virus laden links sent out to all of your contacts, very embarrassing

So deleted all contacts out of hotmail and left an autoresponder message, "I've been hacked, if you know me, use my normal email. If you dont, use the contact form on mylocalservices"

Steve Richardson
Gaffer of My Local Services
My Local Services | Me on LinkedIn

Hiya Dreamraven

Was curious enough to look up the Windows Task Manager on my old laptop.

Obviously a nasty doesn't stick up a placard saying "I'm really a trojan" so what do you look for plse?

My user name files say Linda; System; Local Service; Network Service - all perfectly innocent sounding. The only CPU processes running are explorer.exe 01;svchost.exe 01 (intermittently); and system idle process 98.

I assume all is well, therefore, but I'm not sure I'm looking at the right items of information.

Any more guidance please?

Linda
CareersPartnershipUK

I normally just take a screenshot of my taskmanager when I don't have any programs running. This gives me a general idea of what is running on the system. I have seen one or two viruses that register on the task manager when they start using resources like RAM and CPU. When I think my system is infected, I take another screenshot of my task manager without any programs running, and compare the two. If I find something that is running on one, that isn't on the original, I take a closer look at that. Most times, you can right click on a process and it shows a link that gives you some details on the process. I also take screenshots when I install or uninstall new software so that I have an updated version.

It seems a bit anal but I've lost so many systems because of viruses, its like a pet peeve of mine.

Thanks,
Dreamraven

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