Analysis by: Michael Jay Villanueva
ALIASES:

Mal/Autoinf-D (Sophos); TR/Autorun.AA.22 (Avira)

 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 automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size: 294,813 bytes
File Type: INF
Memory Resident: No
Initial Samples Received Date: 20 Jan 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]
action=Open folder to view files
[garbage characters]
icon=shell32.dll,4
[garbage characters]
open=RECYCLER\DSCI5829.jpg
[garbage characters]
shell\Explore=Explore
[garbage characters]
shell\Explore\command=RECYCLER\DSCI5829.jpg
[garbage characters]
shell=Explore
[garbage characters]
UseAutoPlay=1
[garbage characters]

Other Details

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

  • RECYCLER\DSCI5829.jpg

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.668.04
FIRST VSAPI PATTERN DATE: 20 Jan 2013
VSAPI OPR PATTERN File: 9.669.00
VSAPI OPR PATTERN Date: 21 Jan 2013

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


Did this description help? Tell us how we did.