BKDR_BEDEP.SDGO

 Analysis by: Jeanne Jocson

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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 arrives as a component bundled with malware/grayware packages.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information. However, as of this writing, the said sites are inaccessible.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

294,912 bytes

Memory Resident:

Yes

Initial Samples Received Date:

02 Apr 2016

Payload:

Connects to URLs/IPs

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.

It arrives as a component bundled with malware/grayware packages.

Installation

This backdoor adds the following mutexes to ensure that only one of its copies runs at any one time:

  • Global\{GUID}

It injects codes into the following process(es):

  • iexplore.exe
  • firefox.exe
  • chrome.exe

Backdoor Routine

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

  • initialize connection
  • download and execute arbitrary files
  • update self with click fraud module
  • report information

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

  • http://{random generated domain}.com/{URI}

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

  • build ID
  • bot ID
  • processor (32 or 64-bit)
  • OS version
  • protocol version
  • cookie

However, as of this writing, the said sites are inaccessible.

Other Details

This backdoor requires its main component to successfully perform its intended routine.

NOTES:

It access the following website to get data that will be used to generate {random generated domain}:

  • http://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml?{hex values}

The downloaded click fraud module is used to communicate with advertisement fraud servers to access various ads.

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

12.476.04

FIRST VSAPI PATTERN DATE:

19 Apr 2016

VSAPI OPR PATTERN File:

12.477.00

VSAPI OPR PATTERN Date:

20 Apr 2016

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

Restart in Safe Mode

[ Learn More ]

Step 3

Scan your computer with your Trend Micro product to delete files detected as BKDR_BEDEP.SDGO. 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.

Step 4

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