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Worm:W32/Autorun.NDS

First posted on 17 September 2008.
Source: SecurityHome

Aliases :

There are no other names known for Worm:W32/Autorun.NDS.

Explanation :

A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

right]This worm propagates via the the mapped drives on the infected machine. It also attempts to steal login and account information for popular online games, as well as login details for Yahoo! E-Mail.

Execution

Upon detection, the worm drops a copy of itself in the root of all mapped drives from C: to Z:, including network drives. Any machine connected to an infected network drive will then be infected themselves when they access the drive.

The worm also creates an autorun.inf file, which is used to execute the worm automatically when the root of the drive is viewed using Windows Explorer.

The typical "autorun.inf" appears as:

[AutoRun]
open=c.cmd
shellopenCommand=c.cmd
shellopenDefault=1
shellexploreCommand=c.cmd

Payload

The worm also creates a number of files, including the mmvo0.dll file which is detected as Trojan-PSW:W32/OnlineGames.TLB. This malware is used to obtain account information for popular online games such as Ragnorak Online.

In addition, it attempts to capture Yahoo! E-Mail login details whenever the following URLs are accessed:

• https://login.yahoo.co.jp/config/login_verify2?.src=ym
• https://login.yahoo.co.jp/config/login?

The captured information is most likely sent to the remote server.

Registry

Upon execution, the worm modifies a number of registry keys in order to thwart recognition and removal. If it detects the files No32Kui.exe (NOD32 Antivirus) and RavMon.exe (RAV Antivirus), it will attempt to terminate them to prevent these security products from detecting its presence. While the worm is making these registry changes, it will also attempt to prevent NOD32 Antivirus from displaying alert notifications.

Last update 17 September 2008

 

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