VBS_NOBAI.A

May 09, 2014

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 Analysis by: Al Victor de Leon

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 ALIASES:

VBS/TrojanDownloader.Agent.NFZ trojan (Nod32)

 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: Trojan
• 
  Destructiveness: No
• 
  Encrypted:
• 
  In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size:

12,792 bytes

File Type:

VBS

Initial Samples Received Date:

03 May 2014

Arrival Details

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

Download Routine

This Trojan saves the files it downloads using the following names:

• {script full path}/{random file name}.tmp.wsf

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}c.htm