TROJ_OTORUN.WINI

May 29, 2014
 Analysis by: Jaime Benigno Reyes
 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 may be dropped by other malware.

It automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

994,288 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

27 May 2014

Arrival Details

This Trojan may be dropped by other malware.

Propagation

The said .INF file contains the following strings:

;{garbage codes}
[Autorun]
;{garbage codes}
open=CMD /C START DriveCfg.{645FF040-5081-101B-9F08-00AA002F954E}\cfg-29570369.x11
;{garbage codes}
icon=%windir%\system32\SHELL32.dll,3
;{garbage codes}
action=Browse the contents of the drive.
;{garbage codes}
shell\open=Open
;{garbage codes}
shell\open\default=1
;{garbage codes}
shell\explore=Explore
;{garbage codes}
shell\explore\command=CMD /C START DriveCfg.{645FF040-5081-101B-9F08-00AA002F954E}\cfg-29570369.x11
;{garbage codes}
shell\search=Search...
;{garbage codes}
shell\search\command=CMD /C START DriveCfg.{645FF040-5081-101B-9F08-00AA002F954E}\cfg-29570369.x11
;{garbage codes}
useautoplay=1
;{garbage codes}

Other Details

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

  • {Drive Letter}:\DriveCfg.{645FF040-5081-101B-9F08-00AA002F954E}\cfg-29570369.x11

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.822.02

FIRST VSAPI PATTERN DATE:

27 May 2014

VSAPI OPR PATTERN File:

10.823.00

VSAPI OPR PATTERN Date:

28 May 2014

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_OTORUN.WINI. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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