Analysis by: Rhena Inocencio
ALIASES:

Trojan.Agent.BSFH (BitDefender), VBS/Psyme.LV (FProt)

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

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 10,347 bytes
File Type: VBS
Initial Samples Received Date: 31 Mar 2016

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:

  • {malware path}\istt.exe
  • {malware path}\mstdc.exe
  • {malware path}\sst.bat

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!286?st.zip
  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!475?32.zip
  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!476?64.zip
  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!480?xptcpt.zip
  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!493?64.zip
  • http://storage.{BLOCKED}e.com/items/FFCB80A06D421D31!494?32.zip