Analysis by: Nikko Tamana
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 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: Dropped by other malware, Downloaded from the Internet

This backdoor may arrive bundled with malware packages as a malware component. It 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: 1,624,064 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 13 Feb 2013
Payload: Compromises system security, Steals information

Arrival Details

This backdoor may arrive bundled with malware packages as a malware component.

It 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 system command
  • Open file
  • Delete file
  • Upload file
  • Download file
  • Get network information
  • List directory content
  • Terminate itself

Information Theft

This backdoor steals the following information:

  • OS Version
  • Module Version
  • MAC Address
  • Computer Name
  • Volume Information
  • User Name

NOTES:

This backdoo communicates to jabber-br.org using a hardcoded user account as its C&C server. It uses XMPP protocol in the communication.

This is the format of how it sends the stolen information:

to="{BLOCKED}14@jabber-br.org/MASTER"
type="0"
id="8dcb59505a">
Zbody>SISTEMA DE 32 BITS
Plugin RED......: NAO
Plugin GB.......: NAO
Os..............: {OS Version}
Versao Mudulo ..: {Module Version}
Mac Aderess.....: {MAC Address}
Computador......: {Computer Name}
Volume..........: {Volume Information}
Usuario.........: {User name}
1.0.0.16

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.604.03
FIRST VSAPI PATTERN DATE: 13 Feb 2014
VSAPI OPR PATTERN File: 10.605.00
VSAPI OPR PATTERN Date: 14 Feb 2014

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

Scan your computer with your Trend Micro product to delete files detected as BKDR_BERBOT.XMPP. 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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