Threat Description

Mimail.K

Details

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

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:

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



Removal



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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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