BKDR64_NETCOM.GQA

April 05, 2017
 Analysis by: Warren Adam Sto. Tomas
 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes commands from a remote malicious user, effectively compromising the affected system.

It steals certain information from the system and/or the user.

  TECHNICAL DETAILS

File Size:

284,162 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

03 Apr 2017

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Backdoor Routine

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

  • Execute a program
  • Change file’s creation time, last access time, last modified time.
  • Send or receive files via FTP
  • Modify HTTP proxy (port to use, IP address to allow, IP address to deny, User-Agent, view server info, end proxy service)
  • Connect to a telnet server and execute command
  • Port scanning
  • List all active processes
  • List all active processes with its modules
  • Kill a process
  • Execute programs using different profile (Windows’ runas command)
  • Create, delete, start, stop, or configure a service
  • Query the following information of a service
    • Service Configuration
    • Display Name
    • Key Name
    • Description
  • Shutdown, log off, reboot, or power off the system
  • Modify Socks proxy (port to use, IP address to allow, IP address to deny, User-Agent, view server info, end proxy service)
  • List, add, delete, or modify a user account
  • Download file from a URL
  • Share a shell
  • Change current directory
  • Display files and subdirectories in a directory
  • Copy, delete, or move files

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

  • {BLOCKED}.{BLOCKED}.2.125:53

Information Theft

This Backdoor steals the following information:

  • IP Address
  • Computer name
  • User name

NOTES:

This backdoor has the ability to delete itself after execution.

It will send the information gathered from executing its commands to the mentioned URL.

  SOLUTION

Minimum Scan Engine:

9.850

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Terminate the malware/grayware/spyware process:

[ 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 BKDR64_NETCOM.GQA. 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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