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INF_OTORUN.BIS

May 02, 2013
 Analysis by: Rika Joi Gregorio
 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 may be dropped by other malware.

It automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

1,029,473 bytes

File Type:

INF

Initial Samples Received Date:

25 Apr 2013

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 DataMgr.{645FF040-5081-101B-9F08-00AA002F954E}\datamgr-x4297028.c32
;{garbage codes}
shell\open=Open
;{garbage codes}
shell\open\command=CMD /C START DataMgr.{645FF040-5081-101B-9F08-00AA002F954E}\datamgr-x4297028.c32
;{garbage codes}
shell\open\default=1
;{garbage codes}
shell\explore\command=CMD /C START DataMgr.{645FF040-5081-101B-9F08-00AA002F954E}\datamgr-x4297028.c32
;{garbage codes}
shell\search\command=CMD /C START DataMgr.{645FF040-5081-101B-9F08-00AA002F954E}\datamgr-x4297028.c32
;{garbage codes}
useautoplay=1
;{garbage codes}

Other Details

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

  • {drive letter}:\DataMgr.{645FF040-5081-101B-9F08-00AA002F954E}\datamgr-x4297028.c32

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.886.06

FIRST VSAPI PATTERN DATE:

29 Apr 2013

VSAPI OPR PATTERN File:

9.887.00

VSAPI OPR PATTERN Date:

30 Apr 2013

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 INF_OTORUN.BIS. 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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