AUTORUN.EXE - Dangerous

What you should do about AUTORUN.EXE:

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Your PC may be infected. The presence of a file called AUTORUN.EXE is a possible sign of infection.


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What we know about AUTORUN.EXE:

The filename AUTORUN.EXE was first seen on Jun 6 2007 in The UNITED STATES. It has also been seen in the following geographical regions of the Prevx community:

  • SPAIN on Jan 29 2008
  • The EUROPEAN UNION on Sep 29 2007
  • NETHERLANDS on May 9 2008
The filename AUTORUN.EXE refers to many versions of an executable program.

The most common file size is 7,680 bytes. But the following file sizes have also been seen:

  • 860,160 bytes
  • 9,728 bytes
  • 102,400 bytes
  • 2,337,823 bytes

The unsafe files using this name are associated with the malware group Spyware.WinAntiVirus.Some files using the name AUTORUN.EXE are also associated with the malware group:
  • Downloader.Small.60.P
 These files have no vendor, product or version information specified in the file header.

AUTORUN.EXE has been seen to perform the following behavior(s):

  • The Process is packed and/or encrypted using a software packing process
  • Adds a Registry Key (RUN) to auto start Programs on system start up
  • Changes Windows Firewall Control Settings to allow itself to communicate with other computers
  • Creates a new Background Service on the machine
  • Looks at the contents of the autoexec.bat file
  • Reads email address and phone book details
  • Creates potentially fake system tray messages and error warnings
  • Disables Access to the Windows Registry Editior
  • Modifies Windows Security Policies to restrict/expand User Privlidges on the machine
  • Deletes Links in the Start Menu
  • Adds a Link in the Start Menu
  • This Process Creates Other Processes On Disk
  • This Process Deletes Other Processes From Disk
  • Modifies the Windows Host File which could be used to stop you visiting specific web sites by redirecting you to alternative addresses without you knowing
  • Registers a Dynamic Link Library File

AUTORUN.EXE has been the subject of the following behavior(s):

  • Created as a process on disk
  • Copied to multiple locations on the system
  • Executed as a Process
  • Registered as a Dynamic Link Library File
  • Created as a new Background Service on the machine
  • Deleted as a Link in the Start Menu
  • Added as a Link in the Start Menu
  • Deleted as a process from disk

AUTORUN.EXE can also use the following file names:

  • 73033012.DAT
  • 34896855.SVD
  • PRINTER.EXE
  • FINDFAST.EXE
  • SHELL.EXE
  • SPOOLVS.EXE
  • WINAVXX.EXE
  • SYSTEM.EXE
  • 77967823.EXE
  • 70149966.EXE
  • 46888978.EXE
  • AUTORUN.EXECOMMON STARTUP
  • SYSTEM.EXESTARTUP
  • 32336364.EXE
  • 800005C7