Analysis by: Rhena Inocencio
ALIASES:

Rogue:JS/Winwebsec (Microsoft), JS/FakePAV (McAfee), Trojan.HTML.FakeAlert.ac (Sunbelt)

 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

Canal de infección Downloaded from the Internet

This Trojan executes when a user accesses certain websites where it is hosted.

  TECHNICAL DETAILS

Tamaño del archivo Varies
Tipo de archivo HTML, HTM
Residente en memoria No
Fecha de recepción de las muestras iniciales 27 Oct 2012
Carga útil Displays message/message boxes, Downloads files

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

Rogue Antivirus Routine

This Trojan displays the following fake alerts:

It displays the following window and pretends to scan the system:

NOTES:

Upon closing the browser, this Trojan displays the following message box:

It attempts to access the URL http://{hosted site}/?c=RaEdMCsEyD9o2pcO17KNED++ne2mVXnHy4mjwXhRf8nAluVQznWWinHO1wFBiRpfsWVOwr9LK5bkhQ==. It accesses the URL to download a possibly malicious file.

  SOLUTION

Motor de exploración mínimo 9.300
Primer archivo de patrones de VSAPI 9.490.01
Primera fecha de publicación de patrones de VSAPI 27 Oct 2012
Versión de patrones OPR de VSAPI 9.491.00
Fecha de publicación de patrones OPR de VSAPI 28 Oct 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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as HTML_FAKEAV.EHN. 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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