Analysis by: Michael Cabel
 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

Infection Channel: Spammed via email

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size: 220,244 bytes
File Type: DOC
Memory Resident: No
Initial Samples Received Date: 18 Sep 2012
Payload: Downloads files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan drops the following files:

  • %System Root%\panel.swf

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

NOTES:

The dropped embedded SWF file takes advantage of a vulnerability in certain versions of Adobe Flash Player to download another malicious file from the following URL:

  • {BLOCKED}3.{BLOCKED}4.207.193

It saves the file it downloads as %User Temp%\SETUP_120917_W.EXE. Trend Micro detects the downloaded file as TROJ_DROPER.RE.

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

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.404.04
FIRST VSAPI PATTERN DATE: 18 Sep 2012
VSAPI OPR PATTERN File: 9.405.00
VSAPI OPR PATTERN Date: 19 Sep 2012

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

Remove malware files dropped/downloaded by TROJ_SWFXPL.AE

    TROJ_DROPER.RE

Step 3

Search and delete this file

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result. %System Root%\panel.swf

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_SWFXPL.AE. 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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