|Detected||Feb 28 2011 10:44 GMT|
|Released||Feb 28 2011 16:13 GMT|
|Published||Apr 22 2011 09:00 GMT|
This Trojan downloads files from the Internet and launches them without the user's knowledge. It is a Java class file. It is 5721 bytes in size.
The malware is a component of a Trojan downloader and includes a class file named "sportGame", which downloads a file from the Internet, from a link sent to it, and launches the downloaded file for execution. The downloaded file is saved in the current user's temporary files directory as
%Temp%\<rnd>.exewhere <rnd> is a random fractional decimal number between 0 and 1. Before downloading, the malware checks the name of the OS installed on the infected system. If the OS is not Windows, the download does not take place.
The Trojan constitutes a Java applet. It is launched from an infected HTML page using an "<APPLET>" tag, for which an encrypted link to a downloadable file is sent in parameter named "kids".
As well as the above-mentioned class file, the Trojan contains class files named "lipa" and "portland". The "lipa" class file includes the "loipo" function, which is used to decrypt the link to a downloadable file. The "portland" class file contains a code, designed to exploit a vulnerability (CVE-2010-0840). JDK and JRE up to version 6, 18th update, are vulnerable. This vulnerability appears due to improper verification when executing privileged methods in Java Runtime Environment; this enables the malicious user to execute a random code with a specially modified object, which is a subclass file of the trusted class file.
If your computer does not have antivirus protection and has been infected by this malicious program, follow the instructions below to delete it:
%Temporary Internet Files%
Exploits are programs that contain data or executable code which take advantage of one or more vulnerabilities in software running on a local or remote computer for clearly malicious purposes.
Often, malicious users employ an exploit to penetrate a victim computer in order to subsequently install malicious code (for example, to infect all visitors to a compromised website with a malicious program). Additionally, exploits are commonly used by Net-Worms in order to hack a victim computer without any action being required from the user.
Nuker programs are notable among exploits; such programs send specially crafted requests to local or remote computers, causing the system to crash.