Wdialupd

Classification

Malware

Trojan

W32

Wdialupd, W32/Wdialupd.Adware, PornDial-177, Dialer.Porno.J,, TROJ_WDIALUPD.A, Trojan.Win32.Dialer, Dialer

Summary

We have received several reports about this adware/downloader. The messages that the adware was distributed in, appear to have certain common characteristics.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

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Technical Details

The 'From:' field always consists of a seemingly random sequence of alphanumeric characters followed by '@yahoo.com'. In the reports we received the length of the alphanumeric string was not constant.

The 'Subject:' field looks like those from common SPAM (unsolicited email), referring to porn and other miscellaneous topics.

In all the messages the attachment names are different, they can be the following:

action.zip
adult_movies.zip
my_videos.zip
mymovie.zip
yourfreemovie.zip
 

These ZIP files contain executables that are the actual installers/downloaders of the Wdialupd alware. The names of known Wdialupd executable files are:

1714.exe
2453.exe
2702.exe
5298.exe
 

When run, the Wdialupd asks a user to select his/her location and then attempts to download and activate additional components from Internet without asking for permission.

It posts information on the users location/language to the same address from where it tries to download files, nothing confidential appears to be posted.

The address is a hardcoded IP physically situated in Spain. At the time of this writing the address is unreachable.

The Wdialupd adware is detected by F-Secure Anti-Virus as:

Security risk or a "backdoor" program
 

because of its intrusiveness and because it appears to collect information about computer users.

It is advised to delete messages with Wdialupd downloaders and avoid running their executable files.

Date Created: -

Date Last Modified: -