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TROJ_FAKEXPA.CE

February 16, 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 has received attention from independent media sources and/or other security firms.

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, due to errors in its code, it fails to perform its intended routine.

  TECHNICAL DETAILS

File Size:

214,528 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

15 Feb 2010

Payload:

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.

Installation

This Trojan adds the following folders:

  • %Program Files%\PersonalSec

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other System Modifications

This Trojan adds the following registry keys as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\{random characters}
(Default) =  

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}aredownloadserver.com/download/winlogo.bmp

It saves the files it downloads using the following names:

  • %Program Files%\PersonalSec\psecurity.exe - also detected as TROJ_FAKEXPA.CE

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other Details

However, due to errors in its code, it fails to perform its intended routine.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.852.07

FIRST VSAPI PATTERN DATE:

16 Feb 2010

VSAPI OPR PATTERN File:

6.943.00

VSAPI OPR PATTERN Date:

22 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_FAKEXPA.CE. 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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