arrow_back
search
close

BKDR_BRWSEINJ.A

October 09, 2012
 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.

  TECHNICAL DETAILS

File Size:

32,768 bytes

File Type:

EXE, DLL

Memory Resident:

Yes

Initial Samples Received Date:

27 Aug 2012

Payload:

Connects to URLs/IPs

Arrival Details

This backdoor may be dropped by the following malware:

Installation

This backdoor injects itself into the following processes running in the affected system's memory:

  • Chrome.exe
  • Firefox.exe
  • Iexplore.exe
  • Netscape.exe
  • Opera.exe

Backdoor Routine

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

  • Download files
  • Execute files
  • Get drive information
  • Manage files and folders
  • Perform remote shell

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}1.{BLOCKED}4.68.239:80
  • {BLOCKED}1.{BLOCKED}4.68.239:80/ym/Attachments

It posts the following information to its command and control (C&C) server:

  • Computer name
  • OS information
  • User name

Other Details

This backdoor requires the following additional components to properly run:

  • %User Temp%\dsaideo.dll - also detected as BKDR_BRWSEINJ.A

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

  SOLUTION

Minimum Scan Engine:

9.200

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_BRWSEINJ.A

Step 3

Scan your computer with your Trend Micro product and note files detected as BKDR_BRWSEINJ.A

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Search and delete the file detected as BKDR_BRWSEINJ.A

*Note: Some component files may be hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.

To manually delete a malware/grayware file from the affected system:

  1. Right-click Start then click Search....
  2. In the Named input box, type the name of the file that was detected earlier.
  3. In the Look In drop-down list, select My Computer then press Enter.
  4. Once located, select the file then press SHIFT+DELETE to delete it.

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_BRWSEINJ.A. 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.


Did this description help? Tell us how we did.