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Friday, July 25, 2008

what is Action Script ?


Action Script is an object oriented scripting language designed by Garry Grossman of Macromedia, used for developing and deploying websites and software is the Adobe Flash Player platform ie in the form of SWF files embedded in web pages ( RIA s- Rich Internet Applications) based on ECMAScript. Though owned by Macromedia it is now fully owned by Adobe after it took over Macromedia.

Though it first appeared as a very simple scripting language in 1998, it has now many features available which makes it a flexible programming language for web applications. The files coded i n Action Script have the extension '.as' .

Action Script combined with MXML makes GUI programming very easy. Flex uses Action Script and MXML to design RIA s. It is preferred above Java at client side programming while Java is used at the server side. Compared to java, Action scripts provides balance between static and dynamic languages by allowing you to program in both Java and JavaScript styles.

The latest version is Action Script 3.0 released in June 27, 2006. It runs on ActionScript Virtual Machine (AVM) in Flash Player 9 .

Monday, July 21, 2008

Lmok D - Trojan


Lmok D is a trojan that i found in my computer while scanning using yahoo tool bar sypware detector. It was released on July 10 , 2008 and i have so far not been able to find a suitable solution to remove it. It has not been detected by any anti-virus softwares i used like MaAfee etc.

According to the details shown in ca.com it has high overall risk. The files associated to it are zzqlihoxnsn.dll, fxptjkc.exe, hxolwhnjrhs.exe, zzqlihoxnsn.dll, hxolwhnjrhs.exe, and fxptjkc.exe.


I will post a suitable removal techniques for it once i find it. Since its just a week old removal updates may not be available yet. If anyone knows how to remove it or knows any other helpful details on it please comment here.

What is a Trojan or Trojan horse ?


Trojan or Trojan horse can be considered as a program with a hidden intent or agenda. It is a malware which is responsible for huge amounts of data loss and system failures around the world. To trojan a program would be to add subversive functions to a program making it potentially dangerous and a tool most often used by hackers.

The name Trojan has been taken from the classical tale of "Trojan house" used in the legendary war. It was coined by Daniel Edwards of NSA who was credited first to have discovered such programs in his report "Computer Security Technology Planning Study". Trojans are classified on the basis of the way they attack into 6 trojan payloads : Remote Access , Data Destruction , Downloader ,Server Trojan, Security software disabler, Denial of Service attack.

They cause lot of damage in the form of data destruction, corrupting files, disabling security features, downloading and uploading files, key logging etc.

Due to these reasons protecting our system from trojans is of utmost importance and hence the trojan removal facilities has been included in all leading anti-virus programs. Sometimes separates patches may have to be downloaded and used to remove certain particular trojans as well. Due to the vast number of trojans reaching the internet each day one can never assume a system to be fully safe from its clutches.

Sunday, July 20, 2008

Whats is Adobe Flex?


Ever wondered how it would be to to have a 'sign in' button that would run away from the mouse pointer if the password you entered is wrong or to see multiple videos in a 3 D view all in the usual same old web browser, if anyone was under the delusion that such RIA s (Rich Internet Applications , those applications which exhibit Desktop application behavior ) are not possible to be viewed in a web browser then its time to think again.

Flex is a cross-platform open source development framework that allows you to create Rich Internet Applications (RIAs) which can be deployed in all leading web browsers and operating systems. Applications can be developed using Flex SDK. It is a component based tool used to develop applications that run using Flash Player or Adobe AIR(Adobe Integrated Runtime). It can be considered as a competitor to Ajax, JavaFX , Silverlight. It can be used to produce really cool applications with mind boggling effects.

In Feb 2008 the Flex 3 SDK was released. Flex 4 codenamed Gumbo in expected to be released in 2009.

See this sample that has come out http://flex.org/showcase/




Popular Misunderstandings : Flex is not a animation tool or server side language.
Tag based MXML acts as basis for Flex projects. MXML is a custom XML namespace looks like . Actionscript3 can be used to add certain behaviors. Flex also supports common OOP practices like MVC patterns , etc. ( Model - View controller)






More details and discussions on the topic will be posted later on.