Mimail.K worm was found on 26th of November, 2003. It is a minor variant of Mimail.E worm. The description of Mimail.E worm variant can be found here:
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.
The Mimail.K worm is a minor variant of Mimail.E worm. The differences between these 2 versions are as follows:
1. The worm installs itself to Windows folder as SYSLOAD32.EXE file and creates a startup key in the Registry:
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run] "SystemLoad32" = "%windir\sysload32.exe"
where %windir% is a Windows directory name.
2. The worm performs a DoS (Denial of Service) attack on the following sites:
darkprofits.cc darkprofits.ws www.darkprofits.cc www.darkprofits.ws
Like Mimail.E, this worm variant spreads itself in the messages that look like that:
From: john@[domain of the recipient] Subject: don't be late! [some random characters] Body: Will meet tonight as we agreed, because on Wednesday I don't think I'll make it, so don't be late. And yes, by the way here is the file you asked for. It's all written there. See you. [some random characters] Attachment: readnow.zip
The attachment is a ZIP archive that contains the worm's executable file with READNOW.DOC.SCR name.
F-Secure Anti-Virus already detects this worm generically as 'I-Worm.Mimail.gen'.