BAT_AUTORUN.A

November 19, 2015
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Worm:Win32/RJump.J (Microsoft); W32/Autom-A (Sophos); VBS.Runauto (Symantec); Virus.VBS.Small.a (VBA32); Virus.VBS.Small.a (Kaspersky); Trojan.BAT.Autorun.A (BitDefender); BAT/Small.K!tr (Fortinet); BAT/Small.K (Avira); BV:Small-B [Trj] (Avast)

 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 via removable drives. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

653 bytes

File Type:

BAT

Memory Resident:

No

Initial Samples Received Date:

30 Mar 2007

Arrival Details

This Trojan arrives via removable drives.

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

Other Details

This Trojan requires the following additional components to properly run:

  • autorun.vbs
  • autorun.reg

  SOLUTION

Minimum Scan Engine:

8.000

FIRST VSAPI PATTERN FILE:

4.378.01

FIRST VSAPI PATTERN DATE:

30 Mar 2007

VSAPI OPR PATTERN File:

4.377.00

VSAPI OPR PATTERN Date:

31 Mar 2007

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • autorun.vbs
  • autorun.reg

Step 4

Scan your computer with your Trend Micro product to delete files detected as BAT_AUTORUN.A. 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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