Threat description




This worm attempts to spread via the Facebook social networking website.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

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F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details


Upon execution, the malware will check itself to determine if it is running as "c:\windows\bolivari19.exe". If it is not, it will drop a copy of itself named as bolivari19.exe and will execute the file.

Once executed, the malware checks its marker c:\windows\fmark2.dat to verify if has already been installed. If the file does not exist, the malware will display the following message:

  • Title: Error Message: Error Installing Codec. Please contact support.

It will then create the file.

Next, the malware checks for existing Facebook cookies, in preparation for its installation and propagation routine. If no cookie is found, the malware just terminates and deletes itself.

The worm will then perform a post request (POST /fb/first.php?[...]=0&v=20&c=1&s=fb&l=en&ck=1&c_fb=1&c_ms=0&c_hi=0post) to a220[...].com, to receive the necessary data, such as the URL link of the malware executable file.

Registry Changes

On installation, the malware creates a registry key that allows the malware to function on the infected machine.


The malware propagates by using the cookie session of an infected Facebook user's account to post messages to people on the person's friends list. The message posted will include some tantalizing text such as "Someboody puload a vvldeo wtlh you on utubbe you hsould see", and a link.

The message content changes as new variations are downloaded by the worm during execution.

Clicking on the link leads to an external malicious website offering a (fake) YouTube video. The user is then informed that their "Flash Player is outdated" and they are prompted to "download an update". Doing so will download the malware's executable file.

This propagation method is effective because the message is supposedly posted by a friend. A person receiving such a message is far more likely to click the included link, greatly increasing the chances of infection. This propagation method also allows the malware to spread in the MySpace social interaction website, though based on its code, Facebook is its preferred propagation site.

In addition to posting messages to other users, the worm may also propagate by putting a link on the infected user's profile, which may also lead unsuspecting users to the malicious website.

Registry Modifications

Creates these keys:

  • HKEY_LOCAL_MACHINE\Microsoft\Windows\CurrentVersion\Run sysftray32 = c:\windows\bolivar19.exe

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