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TROJ_FAKEAV.JSA

March 03, 2010
 Analysis by: adel
 PLATFORM:

Windows 98, ME, NT, 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

This Trojan uses social engineering methods to lure users into performing certain actions that may, directly or indirectly, cause malicious routines to be performed. Specifically, it takes advantage of Google search function, wherein it returns a link that contains the malicious URL and file when a user keys in Tsunami hitting Hawaii.

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

This Trojan may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

235,008 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

01 Mar 2010

Payload:

Terminates processes, Displays windows, Downloads files

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

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

However, as of this writing, the said sites are inaccessible.

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • ash*
  • avg*
  • MCSA*
  • MSASCui*

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • {BLOCKED}e-field.in
  • {BLOCKED}esystem.in
  • {BLOCKED}ctedsystem.in

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.884.08

FIRST VSAPI PATTERN DATE:

01 Mar 2010

VSAPI OPR PATTERN File:

6.885.00

VSAPI OPR PATTERN Date:

02 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

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAV.JSA. 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.


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