RE: Patched IIS/frontpage host compromised 7-1-2003

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Date: Wed, 16 Jul 2003 01:45:44 -0400
To: "Johnson, April" <apjohnson@seattleschools.org>, <incidents@securityfocus.com>

This sounds very much like an issue that was posted on FullDisclosure in in June, and for which McAfee has a description (and for which, oddly coincidentally, I had to do some research today). Do a google on mschk.exe and you may see this.

I don't recall that this was an IIS flaw as I was looking at it from a different angle, the McAfee description should advise. Also, I suspect the fulldisclosure post was not correct with respect to the firewall and av disabling aspects.

Then again, this may not be exactly the same issue I looked at earlier today.....

G

 -----Original Message-----
From: Johnson, April
Sent: Wed Jul 16 01:24:16 2003
To: incidents@securityfocus.com
Subject: Patched IIS/frontpage host compromised 7-1-2003

I'm an exceptionally unhappy admin (and perhaps a little embarassed as
well). At this point I'm assuming it's impossible to adequately secure
IIS server with Frontpage extensions?

What the server had:
-Patched to SP3 + updates (on 7/1 I hadn't fully deployed SP4 yet).
-Frontpage Extensions
-Visibility to the internet on ports 80 and 443
-Oubound access on all ports
-Norton Anti-virus with realtime protection and current definitions
-Non-admin users denied access to system folders
-RestrictAnonymous was set to 1
-Indexing service was not active
-IIS sample apps and MSADC/Scripts directories were not present
-Parentpaths were disabled

What the server did NOT have:
-The POSIX subsystem was not removed
-The IIS lockdown tool was not run

Rootkit/compromise components I've found so far (yes, I'm about to
format this box...)
-a service called 'Detector' that may be a "Serv-U" service
-a local user created named 'default' and placed in the Administrator's
group
-scripts found in the system32 subdirectory called script.bat and
script80.bat
        *extracts from a bean.cab (and bean80.cab) file
        *it created mschk.dll
        *copies up files called drive.exe, drives.txt and syswdrv.dll to
look for warez drive space
-special subdirectories hidden in the recycler

Hidden in the Serv-U.ini file is a registration key, and a username
DeVilRiDer; Serv-U was configured with a "look" user, a "chameleon"
user, and a "leech" user (not NT accounts, but within the app).

Two TFTP files, TFTP1568, TFTP 1872.

Other changes:
The Telnet services was started (although not visible to the outside)

That's about it.
At this point, I'm now formatting the box.

Thoughts? Shall I give up on ever making a Frontpage Server visible to
the outside? I don't have the same level of problems on my Apache
servers, although compromise is still possible.

April Johnson (CISSP, CCNP, MCSE)
apjohnson@seattleschools.org*nospam*

"Give a kid a fish, and he eats for a day. Teach a kid to fish, and he
eats for a lifetime."

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• Previous message: Frank Knobbe: "Re: qmail smtp-auth bug allows open relay"
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