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             AUSCERT External Security Bulletin Redistribution

           ESB-2004.0162 -- Trend Micro Medium Risk Virus Alert
     WORM_NETSKY.C (W32/Netsky.C@MM, W32.Netsky.C@mm, Win32.Netsky.C,
                        NetSky.C, I-Worm.Moodown.c)
                             26 February 2004

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        AusCERT Security Bulletin Summary
        ---------------------------------

Publisher:              Trend Micro
Operating System:       Windows
Impact:                 Reduced Security
                        Access Confidential Data
Access Required:        Remote

Ref:                    AL-2004.05

Comment: See also:

http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_NETSKY.C
http://www3.ca.com/virusinfo/virus.aspx?ID=38406
http://us.mcafee.com/virusInfo/default.asp?id=description&virus_k=101048
http://www.f-secure.com/v-descs/netsky_c.shtml
http://www.sophos.com/virusinfo/analyses/w32netskyc.html
http://securityresponse.symantec.com/avcenter/venc/data/w32.netsky.c@mm.html
http://vil.nai.com/vil/content/v_101048.htm

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A new variant of the NETSKY worm has been found in the wild. TrendLabs HQ 
received numerous infection reports of this new malware spreading in the
United States.

This memory-resident worm propagates through SMTP mail and drops copies 
of itself in network shares. It drops several copies of itself through 
various shared folders in Windows, using enticing file names.

This malware also drops a copy of itself in the Windows folder using the 
file name WINLOGON.EXE. It uses varying email details in the message it
sends out.

As of February 25, 2004 9:20 AM (US Pacific Time), TrendLabs has declared 
a YELLOW ALERT to control the spread of WORM_NETSKY.C.

TrendLabs will be releasing the following EPS deliverables: 

TMCM Outbreak Prevention Policy 83
Official Pattern Release 779
Damage Cleanup Template 267

For more information on WORM_NETSKY.C, you can visit our Web site at:

http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_NETSKY.C

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