Re: possible new irc worm

[Paolo Monti <paolo.monti () effetime it>]

At 01.52 28/06/2003 -0400, Chris Ess wrote:

> What I've come up with so far is this:
>
> The vector appears to be a zip file that contains an HTML file.  The HTML
> file has, at the beginning of it, a base64-encoded executable of some
> sort.

Yes, I decoded easily the MIME stuff using WinZip. Here you are a quick & dirty analisys. The file decoded is a Win32 
PE executable compressed by UPX: it is a new variant of Backdoor.SdBot, an IRC RAT that permits to malicious people to 
control PCs where the backdoor has been installed. On execution, the backdoor copies itself on the %Sysdir% folder and 
modifies the Registry to be executed automatically at every system startup:

Values added: 2
---------------
        HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "hpsched"
                Type: REG_SZ
                Data: hpsched.exe
        HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices "hpsched"
                Type: REG_SZ
                Data: hpsched.exe

I wrote "on the fly" a detection/removal tool, by the way. People interested may download it here:

http://www.nod32.it/cgi-bin/mapdl.pl?tool=Mindjail

ciao,
Paolo.
---
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