full-disclosure - Re: New PowerPoint Trojan installs itself as LSP

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Date: Thu, 20 Jul 2006 09:57:20 -0400
From: Mike Healan <mike@...wareinfo.com>
To: Juha-Matti Laurio <juha-matti.laurio@...ti.fi>
Cc: incidents-subscribe@...urityfocus.com, full-disclosure@...ts.grok.org.uk,
	bugtraq@...urityfocus.com
Subject: Re: New PowerPoint Trojan installs itself as LSP

> Is this 'mechanism' very common and is it difficult to detect by AV? 

No, but you have to be damned careful removing something installed as an
LSP. I've seen literally hundreds of PCs with their network stack
buggered because the owner tried to remove NewDotNet. NewDotNet inserts
itself as an LSP.

Regards,
Mike Healan
www.spywareinfo.com

Juha-Matti Laurio wrote:
> It appears that there is a new type of PowerPoint 0-day Trojan spreading,
> more details at this write-up:
> http://www.symantec.com/enterprise/security_response/writeup.jsp?docid=2
> 006-071812-3213-99
> 
> What the technical details section says is:
> "Installs the file SNootern.dll as a layered service provider (LSP)"
> 
> Wikipedia has only stub type article
> http://en.wikipedia.org/wiki/Layered_Service_Provider
> 
> Is this 'mechanism' very common and is it difficult to detect by AV?
> 
> This new Trojan entitled as Riler.F opens a back door and tries to
> connect to 8800.org,
> earlier Bifrose Trojan uses (or used) this domain too.
> 
> There is a new C variant of Trojan.PPDropper as well, but no information
> about the file name of PowerPoint attachment etc.
> Symantec reports Infection Length as 220,160 bytes, same as used by
> Trojan.PPDropper.B.
> This size information is from Trojan description of another vendor,
> however.
> 
> This summary has been updated to related PowerPoint 0-day FAQ document.
> 
> Regards,
> Juha-Matti
> http://blogs.securiteam.com/index.php/archives/author/juha-matti/

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