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TROJ_SPYEYE.WEC

October 09, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Trojan.Zbot (Symantec), Trojan-Dropper.Win32.Dapato.grc (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows 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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

16,384 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Jul 2011

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting the following malicious websites:

  • http://{BLOCKED}svacation.com/receipt.pif
  • http://{BLOCKED}n.com/invoice.pif

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}-college.de/Webformulare/documentus.exe

It saves the files it downloads using the following names:

  • %User Profile%\Application Data\flash.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.)

Trend Micro detects the dowloaded file as:

  • TSPY_SPYEYE.WEC

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

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.316.15

FIRST VSAPI PATTERN DATE:

29 Jul 2011

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_SPYEYE.WEC

    TSPY_SPYEYE.WEC

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_SPYEYE.WEC. 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.

NOTES:

This malware is detected and removed by the latest Trend Micro anti-malware engine and pattern. Always keep pattern files and engines up-to-date.

To know more about updating your Trend Micro product’s pattern, please refer to the Trend Micro Support Page.
Note: The steps apply for specific products indicated in the page.

To actively detect and protect your machine, enable real-time scanning of your Trend Micro anti-malware product. Refer to the following Trend Micro support page to know more about enabling real-time scanning in your Trend Micro product:

  • Avoid accessing the listed malicious URLs to prevent possible re-infection.
  • Avoid downloading software cracks and/or pirated applications.
  • Clear browser cache and delete cookies regularly.
  • Delete files in the %User Temp% folder.


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