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

Infection Channel: 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

File Size: 126,422 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 21 Mar 2012
Payload: 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

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.854.05
FIRST VSAPI PATTERN DATE: 21 Mar 2012
VSAPI OPR PATTERN File: 8.855.00
VSAPI OPR PATTERN Date: 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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