INF_OTORUN.VBFS

February 04, 2013
 Analysis by: Adrianne Chester Camat
 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:

  • 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 automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Type:

INF

Initial Samples Received Date:

04 Feb 2013

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.

Propagation

The said .INF file contains the following strings:

{garbage characters}
[autorun]
{garbage characters}
open={random}.EXE
{garbage characters}
ActIoN={random number}
{garbage characters}
uSeautoplay=1
{garbage characters}

Other Details

This Trojan automatically executes the following files when a user opens a drive:

  • {drive letter}:\{random file name}.exe