Email-Worm:W32/Mimail.E

Classification

Malware

Email-Worm

W32

Mimail.E, W32/Mimail.E@mm, I-Worm.Mimail.e

Summary

Mimail.E worm was found on 1st of November, 2003. It is a close variant of Mimail.C worm. The description of Mimail.C worm variant can be found here:

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

Removal

Automatic action

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.

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Technical Details

The Mimail.E worm is a minor variant of Mimail.C worm.

The differences between these 2 versions are as follows:

1. The Mimail.E worm's file is 10784 bytes long, compressed with UPX file compressor, the unpacked file's size is 23072 bytes.

2. The worm installs itself to Windows folder as CNFRM.EXE file and creates a startup key in the Registry:

[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
"Cnfrm32" = "%windir\cnfrm.exe"
 

where %windir% is a Windows directory name.

3. The worm performs a DoS (Denial of Service) attack on the following sites:

spews.org
spamhaus.org
spamcop.net
www.spews.org
www.spamhaus.org
www.spamcop.net
 

4. The worm spreads itself in the following message:

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.

5. The .E worm variant doesn't have the spying functionality that was present in the .C worm variant.

Date Created: -

Date Last Modified: -