Win32/AutoRun.VB.AWI [Threat Name] go to Threat

Win32/AutoRun.VB.AWI [Threat Variant Name]

Category worm
Size 286720 B
Detection created May 27, 2012
Detection database version 7172
Aliases Worm:Win32/VB.JN (Microsoft)
Short description

Win32/AutoRun.VB.AWI is a worm that spreads via removable media. The worm serves as a backdoor. It can be controlled remotely.

Installation

When executed, the worm copies itself into the following location:

  • %system%\­%variable1%.exe

The worm creates the following files:

  • %system%\­%variable2%.exe (45056 B, Win32/AutoRun.VB.AWI)
  • %windir%\­%variable3%.exe (36864 B, Win32/AutoRun.VB.AWI)

The files are then executed.


In order to be executed on every system start, the worm sets the following Registry entries:

  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "%variable4%" = "%system%\­%variable1%.exe"
  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "%variable2%" = "%variable2%"
  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Windows NT\­CurrentVersion\­Winlogon]
    • "Shell" = "Explorer.exe , %variable3%.exe"

A string with variable content is used instead of %variable1-4% .


The worm keeps various information in the following Registry key:

  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­GenericHost]
    • "Policy" = %ecrypteddata%
Spreading on removable media

The worm copies itself into the root folders of removable drives using a random filename.


The following file is dropped in the same folder:

  • autorun.inf

Thus, the worm ensures it is started each time infected media is inserted into the computer.

Information stealing

The worm collects the following information:

  • keywords entered into search engines
  • e-mail addresses

The worm attempts to send gathered information to a remote machine.

Other information

The worm acquires data and commands from a remote computer or the Internet.


The worm contains a list of (3) URLs. The HTTP protocol is used.


It can execute the following operations:

  • download files from a remote computer and/or the Internet
  • run executable files
  • terminate running processes
  • delete folders
  • create files
  • delete files
  • open a specific URL address
  • create Registry entries
  • delete Registry entries
  • stop itself for a certain time period
  • set file attributes
  • send gathered information
  • update itself to a newer version
  • remove itself from the infected computer

The worm may set the following Registry entries:

  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Mystatus]
    • "status" = "nowfuck"

The worm changes the home page of the following web browsers:

  • Internet Explorer

The worm sends links to Yahoo! Messenger users.

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