JAVA_DLOAD.ARJ

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It takes advantage of unknown vulnerabilities in certain software to download malicious files.

It requires its main component to successfully perform its intended routine.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Download Routine

This Trojan takes advantage of unknown vulnerabilities in the following software to download malicious files:

• Java Runtime Environment (JRE)

It saves the files it downloads using the following names:

• %Temp%\{Random Number}.dll

(Note: %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)

Other Details

This Trojan requires its main component to successfully perform its intended routine.

More information on this vulnerability can be found below:

• CVE-2010-0840

NOTES:
This Trojan checks if the affected system's operating system is Windows. If the said condition is met, it attempts to exploit the said vulnerability. Otherwise, it terminates itself.

Once it successfully exploits the said vulnerability, it connects to certain websites to download possibly malicious files.

It executes the file it downloads using the following command:

• regsvr32 -s {Malware path and File name}