What I Think

Posts Tagged ‘security

According to Antivirus firm, F-Secure, Microsoft has failed to remove a long recognised security risk from Windows 7.

According to F-Secure’s Chief research officer, Windows operating systems (NT, 2000, XP, Vista and now Windows 7) contains a “hide extensions” feature which could be exploited by virus writers to trick users into opening and running malicious files.

What this virus does is turn documents and folders into executables. For example- you have ‘image.jpg’ file, the virus hides image.jpg and creates exact copy ‘image.jpg.exe’. The .exe is hidden so you won’t notice the difference, even the icons are same. You click to open the file and virus starts acting.

The best way to protect yourself from this attack is to scan your PC and keep User Account Control (UAC) on. Yes! UAC although annoying is helpful. It happened to me – one of my pendrive had this virus. I clicked to open a word file and UAC was asking me if I really want to open the file. I was annoyed, UAC shouldn’t ask my confirmation for opening a document. Them I realised that the document was an .exe file. I clicked no in UAC and scanned my pendrive to find 2 dozen virus. Stay safe and switch on that annoying UAC. 🙂

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I usually write about Windows only cause I use windows (I’ve used both Mac and Linux and like them both). PC users are usually sneered at by Mac users as virus don’t affect Mac. I’ve seen one Mac advertisement stating that there are 1 billion virus out loose but never on a Mac.

I don’t think this statement will hold true any longer, there’s a Mac trojan floating around inside a pirated iWork ’09 release that has appeared on various torrent sites.

the_pirate_bay_-_the_worlds_largest_bittorrent_tracker_-_mozilla_firefox-20090122165814

When installing iWork 09, the iWorkServices package is installed. The installer for the Trojan horse is launched as soon as a user begins the installation of iWork, following the installer’s request of an administrator password (in older versions of Mac OS X, 10.5.1 or earlier, there will be no password request). This software is installed as a startup item (in /System/Library/StartupItems/iWorkServices, a location reserved normally for Apple startup items), where it has read-write-execute permissions for root. The malicious software connects to a remote server over the Internet; this means that a malicious user will be alerted that this Trojan horse is installed on different Macs, and will have the ability to connect to them and perform various actions remotely. The Trojan horse may also download additional components to an infected Mac.

ism0901

According to Intego

Intego is issuing this alert to warn Mac users not to download iWork 09 installers from sites offering pirated software. (As of 6 am EST, at least 20,000 people have downloaded this installer.) The risk of infection is serious, and users may face extremely serious consequences if their Macs are accessible to malicious users.

I guess many PC users would be snickering.

 

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Fx3exeBlocked

Well not really… it’ll happen only if you have kept the security settings on Microsoft’s Internet Explorer 7 to their most paranoid level.

This problem is not with Firefox, Firefox is just honoring your Windows security settings for downloading applications and other potentially unsafe files from the Internet.

According to Mozilla –

Starting in Firefox 3, downloads of executable files (e.g., .exe or .msi) may fail and the Firefox Downloads window will contain this message, under the filename:  This download has been blocked by your Security Zone Policy.

Lot of users won’t be facing this problem if they haven’t played around the security settings. But if you have changed the security settings then — open Internet Options (via Control Panel or from Internet Explorer -> Tools) and click the Security tab. With the Internet zone icon highlighted, click the Custom level… button. (which is default setting) A list of security settings for the Internet zone will appear. Find the “Launching applications and unsafe files” setting (under Miscellaneous) and select “Prompt (recommended)”.

 


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