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Threat Encyclopedia

JS_SHELLCODE.CD

ANALYSIS BY

adel


PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW


Trend Micro has flagged this malicious JavaScript as noteworthy due to the increased potential for damage, propagation, or both, that it possesses.

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

This Trojan may be unknowingly downloaded by a user while visiting malicious websites. It may be hosted on a website and run when a user accesses the said website.

As of this writing, the said sites are inaccessible.

TECHNICAL DETAILS

File Size:

28,283 bytes

File Type:

Script

Memory Resident:

No

Initial Samples Received Date:

09 Mar 2010

Payload:

Downloads files

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

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 download possibly malicious files:

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

  • http://www.{BLOCKED}1century.com/military/notes.exe

As of this writing, the said sites are inaccessible.

SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.908.05

FIRST VSAPI PATTERN DATE:

09 Mar 2010

VSAPI OPR PATTERN File:

6.909.00

VSAPI OPR PATTERN Date:

10 Mar 2010

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 JS_SHELLCODE.CD. 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 this security patch 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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