Analysis by: Sabrina Lei Sioting
 ALIASES:

Dropped:Trojan.Generic.KDV.539088 [FSecure]; Trojan.Win32.Meredrop [Sunbelt]

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Canal de infecção: Dropped by other malware

This backdoor may be dropped by other malware.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

  TECHNICAL DETAILS

Tipo de compactação: 126,422 bytes
Tipo de arquivo: EXE
Residente na memória: Yes
Data de recebimento das amostras iniciais: 21 Mar 2012
Carga útil: Compromises system security

Arrival Details

This backdoor may be dropped by the following malware:

Installation

This backdoor drops the following copies of itself into the affected system:

  • %Windows%\Temp\{random}.dat

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It drops the following files:

  • %User Temp\print32.dll - also detected as BKDR_VISEL.FQ

Backdoor Routine

This backdoor executes the following commands from a remote malicious user:

  • Perform shell command
  • Download and execute files
  • Send system information (IP address, user name, operating system)

It connects to the following websites to send and receive information:

  • {BLOCKED}eip.net

  SOLUTION

Mecanismo de varredura mínima: 9.200
Primeiro arquivo padrão VSAPI: 8.854.05
Data do lançamento do primeiro padrão VSAPI: 21 Mar 2012
VSAPI OPR Pattern Version: 8.855.00
VSAPI OPR Pattern veröffentlicht am: 22 Mar 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 the malware/grayware file that dropped/downloaded BKDR_VISEL.FQ

    TROJ_ARTIEF.FQ

Step 3

Identify and delete files detected as BKDR_VISEL.FQ using either the Startup Disk or Recovery Console

[ Learn More ]

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_VISEL.FQ . 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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