JAVA_EXPL.KAL
Exploit:Java/CVE-2012-1723.AZL (Microsoft)
Windows 2000, Windows XP, Windows Server 2003
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Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan downloads a possibly malicious file from a certain URL. The URL where this malware connects to depends on the parameter hppowndnkgnk passed onto it by its components.
This Trojan arrives as a component bundled with malware/grayware packages. It may be hosted on a website and run when a user accesses the said website.
It takes advantage of software vulnerabilities to allow a remote user or malware/grayware to download files. It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
It requires its main component to successfully perform its intended routine.
TECHNICAL DETAILS
Arrival Details
This Trojan arrives as a component bundled with malware/grayware packages.
It may be hosted on a website and run when a user accesses the said website.
Download Routine
This Trojan takes advantage of the following software vulnerabilities to allow a remote user or malware/grayware to download files:
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Other Details
This Trojan requires its main component to successfully perform its intended routine.
NOTES:
This Trojan downloads a file from the URL specified in the applet parameter hppowndnkgnk and saves it as %User Temp%/oobvr.exe or %User Temp%/ouivgbv.exe.
SOLUTION
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Close all opened browser windows
Step 3
Scan your computer with your Trend Micro product to delete files detected as JAVA_EXPL.KAL. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 4
Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
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