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jeffooi
10-03-2003, 07:00 AM
From: "Trend Micro Newsletters Editor" newsletters@trendmicro.rsc03.com
To: jeffooi@usj.com.my
Cc:
Subject: Trend Micro Medium Risk Virus Alert: WORM_DELODER.A
Date: Sun, 9 Mar 2003 06:37:35 -0800


Dear Trend Micro Customer:

As of March 9, 2:49 AM (US Pacific Time), a significant number of infection reports have reached TrendLabs about this new Internet worm, which has been found to be rapidly spreading in China.

This worm usually arrives bearing the file name, Dvldr32.exe. It uses the valid network utility, psexec.exe, to connect to remote machines via port 445.

To gain full access, it tries to log on as administrator by trying passwords from a fixed list.

If the logon attempt is successful, it drops a copy of itself on target machines with a read-only attribute. On remote machines, it drops a backdoor program with the file name, inst.exe, on the following startup folders:

\%s\C$\WINNT\All Users\Start Menu\Programs\Startup\
\%s\C\WINDOWS\Start Menu\Programs\Startup\
\%s\C$\Documents
Settings\All Users\Start Menu\Programs\Startup\

(Note: %s is the network name of the remote machine.)

To enable its automatic execution, this worm creates the following autorun registry entry so that its copy executes at every Windows startup:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\Run
messnger = Dvldr32.exe

This worm, which runs on Windows 2000 and XP, also disables remote shares.

WORM_DELODER.A is detected by pattern file 480.

For more information on WORM_DELODER.A please visit our Web site at:
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_DELODER.A