Try this on for size - from another list. Looks like the culprit.
Lee
----- Forwarded by Lee C Herbst/Marion County Property Appraiser on
09/18/01 01:31 PM -----
Michael Balasko <[EMAIL PROTECTED]>
Sent by: Windows NT/2000 Discussion List <[EMAIL PROTECTED]>
09/18/01 12:11 PM
Please respond to Michael Balasko
To: [EMAIL PROTECTED]
cc:
Subject: Virus info -Nimda
Here you go, looks like a nasty one...
www.slashdot.org
Nimda: W32.nimda.a.mm
Publish Date: September 18, 2001
Publish Time: 1119 EDT
Initial Assessment Date: September 18, 2001
Initial Assessment Time: 1000 EDT
RISK INDICES:
Initial Assessment: Red Hot
Current Assessment: Red Hot
Threat: High ( Growing The rate of growth and spread is exceedingly rapid
- significantly faster than any worm to date and significantly faster than
any variant of Code red. )
Vulnerability Prevalence: High ( effects IIS servers version 4.0, 5.0, and
internal networks. Milllions of Internet Web server hosts: TruSecure
process and essential configurations should generally be protective. The
vulnerability prevalence world-wide is very high )
Cost: High ( command execution is possible )
Vulnerable Systems: IIS 4.0 and 5.0
SUMMARY:
A new IIS worm is spreading rapidly. Its working name is Nimda:
W32.nimda.a.mm
It started about 9am eastern time today, Tuesday,September 18, 2001,
Mulitple sensors world-wide run by TruSecure corporation are getting
multiple hundred hits per hour. And began at 9:08am am.
The worm seems to be targeting IIS 4 and 5 boxes and tests boxes for
multiple vulnerabilities including:
Almost all are get scripts, and a get msadc (cmd.exe)
get_mem_bin
vti_bin owssvr.dll
Root.exe
CMD.EXE
../ (Unicode)
Getadmin.dll
Default.IDA
/Msoffice/ cltreq.asp
This is not code red or a code red variant.
The worm, like code red attempts to infect its local sub net first, then
spreads beyond the local address space.
It is spreading very rapidly.
TruSecure believes that this worm will infect any IIS 4 and IIS 5 box with
well known vulnerabilities. We believe that there are nearly 1Million such
machines currently exposed to the Internet.
DETAILED DESCRIPTION:
The worm itself is a file called README.EXE, or ADMIN.DLL a 56K file which
is advertised as an audio xwave mime type file.
Other RISKS:
There is risk of DOS of network segments by traffic volume alone There is
large risk of successful attack to both Internet exposed IIS boxes and to
developer and Intranet boxes inside of corporations.
Judging by the Code Red II experience, we expect many subtle routes of
infection leading to inside corporate infections.
We cannot discount the coincidence of the date and time of release,
exactly one week to (probably to the minute) as the World Trade Center
attack .
REPLICATION:
There are at least three mechanisms of spread:
The worm seems to spread both by a direct IIS across Internet (IP spread)
It probably also spreads by local shares. (this is not known for sure at
this time)
There is also an email vector where README.EXE is sent via email to
numerous accounts.
MITIGATIONS:
TruSecure essential practices should work.
Block all email with EXE attachments
Filter for README.EXE
Make sure IIS boxes are well patched and hardened, or removed from both
the Internet and Intranets.
Make sure any developer computing platforms are not running IIS of any
version (many do so by default if either. Disconnect mail from the
Internet Advise users not to double click on any unexpected attachments.
Update anti-virus when your vendor has the signature.
More Mitigations to follow, and additional information from TruSecure.
COMMUNICATION:
Please contact your TruSecure analyst if you have any questions or if you
see actual attempts to exploit this vulnerability.
TruSecure Corporation provides information security assurance services
including TruSecure which significantly reduces the likelihood of
participating companies having information security breaches in six areas
of risk: Electronic (hacking and related) risk, Malicious Code risk
(virus, Trojan worm and related), Privacy risk, Downtime risk, Physical
risk and Human Factors risk. See www.trusecure.com for further information
on these services.
DISCLAIMER:
Copyright 2001 TruSecure Corporation. All rights reserved. This Alert is
the property of the TruSecure Corporation. It may not be redistributed
except within your own company or organization. This Alert is being
provided for informational purposes only and is provided AS IS."The
TruSecure Corporation makes no warranties of any kind, express or implied,
including, but not limited to warranties of merchantability, fitness for a
particular purpose, non-infringement, and warranties arising out of any
course of dealing or course of conduct.
Impenetrable security is unattainable in real world environments; the
TruSecure Corporation cannot and does not guarantee protection against
breaches of security.
IN NO EVENT WILL THE TRUSECURE CORPORATION BE LIABLE FOR ANY BUSINESS
INTERRUPTION, LOST REVENUE, PROFITS OR DATA, OR FOR DAMAGES OF ANY KIND,
HOWEVER CAUSED, ARISING OUT OF YOUR USE OF OR INABILITY TO USE THE
INFORMATION CONTAINED IN THIS WARNING, OR YOUR FAILURE TO RECEIVE ANY
PRIOR OR FUTURE ALERTS, WATCHES OR WARNINGS, EVEN IF THE TRUSECURE
CORPORATION HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Mike Balasko CCDA, CCNA, MCNE 5, MCP, MCSE2K, SCP, N+, A+
City of Henderson
DoIT Network Specialist II
ph:702.565.4226
"Outlook not so good." That magic 8-ball knows everything! I'll ask about
Exchange Server next.
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