VBS_BANLOAD.YWNOC

March 02, 2016
 Analysis by: Rhena Inocencio
 ALIASES:

TrojanDownloader:VBS/Banload.BF (Microsoft), VBS.Downloader.Trojan (Symantec), VBS/TrojanDownloader.Agent.NXR (ESET)

 PLATFORM:

Windows

 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 as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size:

1,942 bytes

File Type:

VBS

Initial Samples Received Date:

18 Feb 2016

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Download Routine

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

  • C:\ProgramData\d{random}\proxyfirewall.zip

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://script.{BLOCKED}iosjoaodoleite.com/proxyfirewall.zip

It does the following:

  • It extracts and executes proxyfirewall.exe from proxyfirewall.zip. The extracted file is placed in the same folder as proxyfirewall.zip