There’s a joke that many people bring out when new Windows viruses hit big…. it goes along the lines of, “download a fix here” and the link points to a knoppix linux livecd download, or a Mandriva download disk, fedora/etc… Some say linux isn’t affected by as many viruses because it lacks market share, I would point out that server market share (take a look at how many linux web servers there are…) would seem to tip the scales a bit, but that’s not the point of this post. What is the point is this…. When you have a Windows pc that is infested what you should do is disconnect from the internet. The problem is, that typically prevents you from getting the tools you need to fix the machine.
Category: Security
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Network Security guide for the home or small business network – Part 13 – Your own worst enemy
Once upon a time I did an article about the biggest computer security vulnerability ever. I’ve also passed along the old “the most dangerous part of a car is the nut behind the wheel” joke. If you haven’t got it yet, the computer user can be the “weakest link”. Let’s face it, you’ve got antivirus, a firewall, all the current windows updates, antispyware and a website pops up. The website looks like Windows security center and says you have a virus and need to get official antivirus software.
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Network Security guide for the home or small business network – Part 12 – Antispyware
I’ve talked about Antivirus software as an essential. Today we’re going to look at Antispyware software. There is a difference. By definition a virus is a piece of software that infects other files or copies itself. A worm is a virus that spreads without user intervention. (From one open network port to another for instance.) Spyware is not necessarily in either category. Spyware is the name given to software that tracks online behavior, some may track online searches, some may be more invasive and track anything typed in to the computer!
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Disinfecting a PC… part 11
All in all, what I’ve documented was a bit over three hours worth of attention to the machine (much more for the full scans, but I didn’t have to stand and watch them.) I didn’t document a sidetrip to a second antivirus scanner. It’s nice to see a system cleaned up that had been so thoroughly infected. There are a couple other notes I should pass along though. When a system has been trojaned the BEST advice is to wipe the disc and reinstall from scratch. (Erase/reformate/install from scratch.)
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Network administration over the holidays
Nobody wants to be tied to their job over the holidays, but what if someone has hacked your servers and is using your machine to scam thousands of people a day? Does that keep for two weeks? Does someone monitor the abuse address? Incidents.org has a post on messages they’ve got from some reporting to abuse administrators receiving back vacation notices that things are basically on “autopilot until sometime next year.”
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Linux php-exploit bot
Incidents.org writes to remind as that bot’s aren’t just for Windows. The recent PHP exploits have seen the use of the “kaiten” bot. After infection on the system it connects to an IRC server. It would primarily target linux systems. They do give a very good way to blunt most Linux bot-style malwares…
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Network Security guide for the home or small business network – Part 11 – Why?
Alright, so you’re still reading this series and you’re thinking. Look, I’m not protecting national security secrets. All I’m doing is (running a business|emailing my grandkids|using the web for research).
True, good point. You’re not at the defense department. OK. Let’s say you just use your computer for email and web browsing. That’s low priority stuff right? No sensitive information on your PC? Do you ever do banking online? Yes – then you should be concerned… No? You should still be concerned… here’s why…
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Disinfecting a PC… part 10
Before I get things wrapped up, I like to scan rinse and repeat until the scans come up clean. So, this scan of AVG gives a chance to delete the archive entry I mentioned the first pass it took. And spybot get’s updated from the internet and re-runs. All looks clean there… Ad-aware get’s an update check and runs again. Everything there looks clean now. The next thing to do is disable and uninstall tightvnc, I don’t want to leave bhodemon running at boot or the tea-timer from spybot now that things are fairly settled.
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Giving the gift of PC security
Brian Krebs at the securityfix has a good article for those that are getting a new pc for Christmas (or those that know someone who is.) He has a nice outline of setting up limited privilege user accounts, installing windows updates, using a firewall and using antivirus. This is a nice concise guide to get a Windows machine tweaked to a fairly secure state.
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More on the Santa IM worm
There are a couple of stories out about the Santa IM worm, otherwise known as IM.GiftCom.All. First up Sans has some interesting analysis of it. It appears that it’s being hosted at 69.56.129.67, when run it resolves smtp.girlsontheblock.com to 38.118.133.241 and attempts to open tcp port 53. It renames itself as c:\windows\winrpc.exe and sets up shop as “Windows RPC Services”. They’re saying instead of a worm it should be more accurately termed a bot with replicating capabilities, it is reliant on controls from an outside site. (From their analysis I presume the 69. ip address above?)