Threat Description

Mimail.K

Details

Category: Malware
Type: Email-Worm
Platform: W32
Aliases: Mimail.K, W32/Mimail.K@mm, I-Worm.Mimail.k, I-Worm.Mimail.gen

Summary


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:

https://www.europe.f-secure.com/v-descs/mimail_e.shtml



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

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

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Technical Details


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'.





Technical Details:Alexey Podrezov, November 26th, 2003


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