JS_KILLAV.AA

May 07, 2013
 Analysis by: Rhena Inocencio
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

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

  TECHNICAL DETAILS

File Size:

27,596 bytes

File Type:

Script

Initial Samples Received Date:

02 May 2013

Payload:

Terminates processes, Steals information

Arrival Details

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

Information Theft

This Trojan gathers the following data:

  • PDF Version
  • Flash Version
  • OS Version
  • Java Version
  • Installed Browsers
  • Microsoft Office Version
  • Installed Anti-virus applications

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}l.{BLOCKED}1.us:8081/web/js.php

NOTES:

This Trojan is hosted on the following website:

  • http://{BLOCKED}l.{BLOCKED}1.us:8081/web/xss.php

It checks for the following running Anti-virus related processes:

  • avira:
    %Program Files%\Avira\AntiVir Desktop\avsda.dll
    %System%\drivers\avipbb.sys
  • bitdefender_2013:
    %Program Files%\Bitdefender\Bitdefender 2013 BETA\BdProvider.dll
    %Program Files%\Bitdefender\Bitdefender 2013 BETA\Active Virus Control\avc3_000_001\avcuf32.dl
  • mcafee_enterprise:
    %Program Files%\McAfee\VirusScan Enterprise\RES0402\McShield.dll
    %Program Files%\Common Files\McAfee\SystemCore\mytilus3.dll
    %Program Files%\Common Files\McAfee\SystemCore\mytilus3_worker.dll
  • avg2012:
    %Program Files%\AVG Secure Search\13.2.0.4\AVG Secure Search_toolbar.dll
    %Program Files%\Common Files\AVG Secure Search\DNTInstaller\13.2.0\avgdttbx.dll
    %System%\drivers\avgtpx86.sys
  • eset_nod32:
    %System%\drivers\eamon.sys
  • Dr.Web:
    %Program Files%\DrWeb\drwebsp.dll
  • Mse:
    %System%\drivers\MpFilter.sys
  • sophos:
    %Program Files%\Sophos\SOPHOS~1\SOPHOS~1.DLL
  • f-secure2011:
    %Program Files%\f-secure\scanner-interface\fsgkiapi.dll
    %Program Files%\F-Secure\FSPS\program\FSLSP.DLL
    %Program Files%\f-secure\hips\fshook32.dll
  • Kaspersky_2012:
    %Program Files%\Kaspersky Lab\Kaspersky Anti-Virus 2012\klwtblc.dll
    %System%\drivers\klif.sys
  • Kaspersky_2013:
    %Program Files%\Kaspersky Lab\Kaspersky Anti-Virus 2013\remote_eka_prague_loader.dll
    %Program Files%\Kaspersky Lab\Kaspersky Anti-Virus 2013\klwtblc.dll
    %System%\drivers\kneps.sys
    %System%\drivers\klflt.sys

It reports if any of these applications are installed.

It attempts to terminate Bitdefender 2012 if netdefender/hui/ndhui.js is found on the webpage.

It loads the following URL:

  • http://{BLOCKED}l.{BLOCKED}1.us:8081/web/css.js?{random number}

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.894.07

FIRST VSAPI PATTERN DATE:

03 May 2013

VSAPI OPR PATTERN File:

9.895.00

VSAPI OPR PATTERN Date:

04 May 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_KILLAV.AA. 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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