This Mytob variant was found at the beginning of May 2006. It sends email messages with a URL to the worm's file that is located on a possibly hacked computer.
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.
Computers infected by the worm send email messages with a URL that points to the worm's file. The worm fakes (obfuscates) the download URL and inserts the user's domain name and email address to the message body to make the message look trustworthy. Here's a sample of a message:
Dear Valued Member, According to our terms of services, you will have to confirm your email by the following link, or your account will be suspended within 24 hours for security reasons. http://www.*domain*.com/confirm.php?account=*email_address*
After following the instructions in the sheet, your account will not be interrupted and will continue as normal.
Thanks for your attention to this request. We apologize for any inconvenience.
Sincerely, *Domain* Abuse Department
where *domain* is the domain name of the recipient and *email_address* is the recipient's email address. The URL points to the file named Confirmation_Sheet.pif that is located on a possibly hacked computer. When a user downloads and runs an infected file, his computer becomes infected and the worm starts to spread from it.