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BKDR_PROXY.NS

October 09, 2012
 Analysis by: Abraham Latimer Camba
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • 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:

101,376 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

18 Sep 2012

Payload:

Compromises system security

Arrival Details

This backdoor may be dropped by the following malware:

Backdoor Routine

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

  • Perform remote shell
  • Download file from C&C server
  • Execute files
  • Sleep for a specified amount of time

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

  • http://{BLOCKED}o.{BLOCKED}o.jp.ftp.sh/AWS96.jsp
  • http://{BLOCKED}o.{BLOCKED}o.jp.ftp.sh/FGK1187.jsp

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

  • Computer name
  • Local IP address
  • Proxy server IP and port
  • Malware ID

  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_PROXY.NS

Step 3

Identify and terminate files detected as BKDR_PROXY.NS

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_PROXY.NS. 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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