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JAVA_EXPLOIT.XE

March 11, 2013
 Analysis by: Mark Joseph Manahan
 ALIASES:

Exploit:Java/CVE-2013-1493 (Microsoft)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

This malware takes advantage of a zero-day Java vulnerability. Once it successfully exploited the vulnerability, it downloads and execute an McRAT backdoor.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

その他

作成される以下のファイルは、「BKDR_POISON.BQG」として検出されます。

  • %User Temp%\svchost.exe

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.

  TECHNICAL DETAILS

File Size:

7,391 bytes

File Type:

Java Class

Initial Samples Received Date:

09 Mar 2013

Payload:

Drops files

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.

Installation

This Trojan drops and executes the following files:

  • %User Temp%\svchost.exe - detected as BKDR_POISON.BQG

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Dropping Routine

This Trojan takes advantage of the following software vulnerabilities to drop malicious files:

  SOLUTION

Minimum Scan Engine:

9.300

VSAPI OPR PATTERN File:

9.775.00

VSAPI OPR PATTERN Date:

09 Mar 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove the malware/grayware file dropped/downloaded by JAVA_EXPLOIT.XE

  • BKDR_POISON.BQG

Step 3

Scan your computer with your Trend Micro product to delete files detected as JAVA_EXPLOIT.XE. 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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