Category: Operating

Disaster preparation 101 — Data backup

Paul

In this one I will talk about Disaster, it happens to all of us from time to time. A fire, a earthquake, a stolen laptop or any number of ways. So what happens to your data, is it stored on the laptop? Is it important very sensitive data? Could you get fired if you lost that data?

[ad#ad2-right]These are all questions you must ask yourself when you have laptop. How do you backup your data or even do you have a backup? Having seen this with my own clients, I must wonder if there are people out there who just don’t care. I had a client the other day who gotten a virus and this was a really mean virus. Deleted some very important files when you tried to clean the virus out. She called me in a panic because she couldn’t load up windows? I asked if she had any backups, she said “what’s a backup” . So I sat there discussing this with the client for over 20 minutes. Finally she started to understand, she said she had the OEM Backup DVD but nothing else. She also said she needed help with getting data off the computer. I told her that I would be able to come the next day and I was lucky the virus didn’t do anything else to her data. We were able to retrieve the data from her system. That is where I start my rant , Why would anyone not have backup of there most important data?

So How do you backup your data? This is controversial and somewhat depends on how much people want to spend to keep there data safe and not loose pictures or music. There are several ways to do it, each way has it’s pitfalls or short comings and requires a little more effort:

Kinds of Backup

Hard Medium – DVD, CD, External Hard drive

Although,  The hard medium is usually used that doesn’t mean you can have a backup other than hard.   Here are some ways to back up on the internet.

Internet Medium:

  • Jungle Disk — Provides online storage through the Amazon s3 service.   Only pay for what you use.   It works well with most Operating system.  I’ve used it on Vista so it is really nice.

  • Carbonite Online backup –Another good Online storage.

  • Some Other Online backup — Here a list from Amazon to better help you find the type of software that you might need.

These are just a few options, if you want to look for other you can.  The important thing to do is BACKUP because if you need some data that gets wiped or destroyed.  You will be kicking yourself for not backing up.

What is a Virus and Why do I have one

Paul2 Replies

After seeing more and more the updates coming from the net.  I wanted to talk about what a Computer Virus or Trojan is and how you get it.   So how did  you could of gotten a Virus in the first place.   So here are some information to consider:

The vulnerability of operating systems to viruses

So what does that mean to you?  Most of the times when you get a virus you have a vulnerability in some place in your Operating system and it is either something that has not be known by Microsoft, Apple, and Linux or is know as a Zero-day Exploit. [ad#ad2-right]

A zero-day (or zero-hour) attack or threat is a computer threat that tries to exploit unknown, undisclosed or patchfree computer application vulnerabilities. The term Zero Day is also used to describe unknown or Zero day viruses.

[Via Wikipedia]

This is one of the most used because if it is an unknown exploit by the Operating System creators then they have a longer to us the exploit.  Most of the time hackers like to use this because that means there is a possibility of finding even more vectors to infect other systems.  You see if they can get on one system they can then find ways to get on other systems.

In the Old days, you’d ask

How Did I Get This Virus, Anyway?

You get a virus when you copy infected files to your computer, then activate the code inside by running the infected application or opening an infected document. How you copy the infected files is irrelevant: Viruses don’t care if you get them as an e-mail attachment, a download, or via a shared floppy disk, though e-mail attachments are the most prevalent (and easiest) mode of transport.

[via PcWorld] (Dated Oct 13, 2000 11:00 pm)

That was before hackers wanted to infect for more personal gains.   There is a list of things that hackers want to get when they Infect a system and it is usually very few things.   In the Old days they wanted the fame but now they want money and to take control over the internet.  They usually want to infect for Money or to have computers become botnets.  Now We aren’t talking about the Movie, I Robot.   Once a system becomes a bot it doesn’t think for itself but follows a line of command from the Command and Control center.  So lets say we have  several hundred bots on one net, and the hacker blacked mailed a server saying if they didn’t pay up they’d get DoS attacked.  With enough bots going to one site at one time can slow or even bring down a site, that is how A hacker sometimes uses a virus or trojan to get into a system.

Viruses & Trojans try to Avoid detection

So you have a virus, it wouldn’t do a virus any good to be detected right after getting onto a system.   More and more, viruses are trying to avoid being seen and heard.  Most hackers who program are wanting to infect more than one system so they have to make really sure that you don’t find out your infected.    So with that said there are several ways  and I won’t try to explain them because I think the link talks about it better than I could.   It however will give people something to think about.

In the next few days there will be another post on How you will be able to figure out if you have a virus.  I had to talk about this first so people could understand how to figure out if you have in the next post.  So stay tuned for more

How to disable autorun the easy way!!!

Paul

I read a report from Cnet about USB devices spreading Virus and I will quote:

The bad guys are intentionally developing new flavors of malware designed to propagate through USB devices,” said Gunter Ollmann, chief security strategist for IBM’s ISS security division. “They are today’s floppy drives.”

[ad#ad2-right]An infected computer can spread a virus to a clean USB thumb drive that is inserted. That USB drive will then be spreading the virus onto other computers if the operating system on those machines has an AutoRun-type feature enabled. The AutoRun function in Windows launches installers and other programs automatically when a flash drive or CD is inserted. The Mac has an equivalent function, according to Ollmann.

[Via Cnet]

In order to disable “autorun“, which in Vista is called Autoplay. In order to disable Autoplay from starting when you insert media into your computer here is how you do it:

You will need to be Logged in as Administrator before this can be done:

Next click start and type “Autoplay” without quotes. It will bring up a screen but all you have to worry about is this:

Vista autorun

You will need to make sure there  is no check mark for “Use AutoPlay for all media and Devices”.   Click save and close.

[ad#ad2-left]Once that is done, you will have no more Autoruns from USB devices.  If you want to disable Autorun in XP, I’d suggest reading some of these articles for XP.

These are just a few and are really nice to articles but there are others out there that might be more to your liking.  I suggest searching Google for them.   I hope this helps you out!!!

Fake WordPress update 2.6.4 steals data!

Paul6 Replies

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The hacked version of the file pluggable appears to be stealing the content of cookies on larger installations of WordPress. Sophos are now detecting this file as Troj/WPHack-A.

[Via Sopho’s]

Apparently this little update is a rogue update.  According to Sopho’s and Craig Murphy’s blog, it is said to steal your data and send it to another site.  This hacked version of WordPress is coming from wordpresz.org so if you happen to stumble onto this fake update, just delete it and go on with your blogging.   Craig talked about how when he logged it this fake update popped up.  So sometimes it is safer to do some digging before you apply an update especially to your Operating system.  Thanks to Sopho’s for telling people about this fake and dangerous problem.

Windows update is getting a revision!

Paul

[ad#ad2-right]According to Computer World, dated Oct 31, 2008 and I’ll quote:

“Over the next couple of months, we’ll be rolling out another infrastructure update to the Windows Update agent (client code),” said an unidentified Microsoft employee on the Windows Update team’s official blog. “This update makes it possible for users to install more than 80 updates at the same time.”

[via Computer World]

Now if your like me and have several computers who need to be updated at a given schedule, you sometimes worry about these updates that come along that might just break your system. I have been using a program call Offline Updater, which does what Autopatcher does really nicely. So why is Microsoft sending out this patch? Two reasons, one they want you to be able to update your operating System without hurting your system integrity.

Now lets talk about the integrity of having to reboot your system. You see, every time you reboot the system, it causes the system hardware some strain.  It is something like having starting up a car, sooner or later you will have the starter go out, because of to much start up.

[ad#ad2-left]Second reason for this is, basically the update software needs to be update yet again for any security flaws or features that might be exploitable.  I am sure there are some and Microsoft probably knows about that we do not.   So that is the second reason, which it is the most obvious reason yet to push out another revision of the Windows update.

What about stopping the update from effecting your system.  The only way that I know of is to prevent Windows from checking for updates.  Which is simple:

Windows XP Version:

[Category View and Classic View]

<Start> / Control Panel / Security / Click Windows Updates

For Windows Vista:

<Orb> / Control Panel/ Security Center/ Windows Update / click “change Settings”

With both ways, you will be able to control four ways to handle Windows updating and they are:

  • Automatic – Will download all necessary updates and install them without your permission or knowledge.  Note some of the updates will automatically reboot your system.  Most commonly they are set to do this every day in the 12am to 4 am period of time.   So when you wake up you would see an log in screen.

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  • Download updates but let me choice which ones to install and when –  This is most commonly used by people who don’t want to bother having to check manually.  It will check and download, then it will let you know.


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  • Check for updates but don’t Download them –  This is like the previous one but this will only tell you.  The rest of the decision is in your hands not the computer.  This is good for people who have limited system resources, like Hard drive space.  It still reminds you like the previous one but won’t download any updates.


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  • Never check for updates –  This is used for people who don’t want to be bothered with updates and have a way to update manually.  This is commonly used by businesses who have several systems on and don’t want to risk an update causing trouble or weigh down the companies internet by downloading updates un-necessarily.   This option is not to be messed with because it leaves your system with quite a lot of vulnerabilities.  You do this one if you have a set schedule to update each and everyone system. (Extremely Dangerous to do)

With what I talked about, I am hoping you find this useful and to share your discoveries with other people who might want to be able to change how Windows updates are handled on other systems.  If you have comments or questions, please post them in the comment section and someone will be more than glad to help you out.