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JS_EXPLOIT.SMZ

October 08, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Exploit.JS.CVE-2010-0806.z (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Trojan executes when a user accesses certain websites where it is hosted.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Script

Initial Samples Received Date:

27 Jan 2011

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

Download Routine

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

  • CVE-2010-0806

After successfully exploiting the said vulnerability, this malware connects to the following URLs to possibly download other malicious files:

  • http://yasisi.{BLOCKED}ki.com/inc/ftp.exe

It saves the files it downloads using the following names:

  • %User Profile%\Application Data\c.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

Other Details

More information on this vulnerability can be found below:

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.796.18

VSAPI PATTERN Date:

28 Jan 2011

VSAPI PATTERN Date:

1/28/2011 12:00:00 AM

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

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  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
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