This worm attempts to spread via the Facebook social networking website.
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.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
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:
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.
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.
Creates these keys: