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UNIRAS ALERT - 06/04 - Malicious Software Report - W32/Netsky.b



 
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      UNIRAS (UK Govt CERT) ALERT - 06/04 dated 18.02.04  Time: 14:35  
 UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Malicious Software Report - W32/Netsky.b
AKA Worm.Moodown.B, W32/Netsky.B, Moodown.B.  

Detail
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Reports are coming in of a new worm known as W32/Netsky.b.  This worm is spreading
rapidly.

W32/Netsky-B is a worm that spreads by email and Windows network shares. 
W32/Netsky-B copies itself into the Windows folder as services.exe. 

In order to run automatically when Windows starts up W32/Netsky-B creates the following registry entry: 

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
service= "C:\\WINDOWS\\services.exe -serv" 

W32/Netsky-B searches all mapped drives for files with the following extensions in order to find email adresses: MSG, OFT, SHT, DBX, TBB, ADB, DOC, WAB, ASP, UIN, RTF, VBS, HTML, HTM, PL, PHP, TXT and EML. 

W32/Netsky-B searches drives C: to Z: and attempts to copy itself into folders with names containing the string "share" or "sharing". 


Links:

http://www.sophos.com/virusinfo/analyses/w32netskyb.html

http://www.fsecure.com

http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_NETSKY.B
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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
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Office Hours:
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Tel: +44 (0) 20 7821 1330 Ext 4511
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Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 20 7821 1330 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of Sophos for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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