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UNIRAS Brief - 105/04 - Malicious Software Report



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 105/04 dated 04.03.04  Time: 16:57  
  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
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Malicious Software Report concerning variants of Bagle and Netsky 

Detail
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During the past week, a number of Bagle and Netsky variants have appeared 
in the wild. Analysis indicates that the activity relates to a so called 'virus 
writer's war' between certain individuals or groups. The comment is substantiated 
by phrases embedded within the code.

See:
http://www.sophos.co.uk/virusinfo/articles/wormwarwords.html
http://www.f-secure.com/weblog/

The level of threat associated with each variant is not easy to assess. However, 
the protective security advice remains the same, ie:

1. Install the appropriate update from your antivirus software vendor as soon as 
possible after it is released.
2. Block suspect or infected file attachments at the boundary gateways.
3. Advise users not to open suspect file attachments even if they appear to be 
from friends or legitimate Email addresses. Note: Social engineering techniques 
are being used to convince users to open such attachments.
4. Users should report suspiciuous Email to their local organisational security 
authorities, who should then advise UNIRAS where it is appropriate. 

UNIRAS will continue to monitor the situation as it develops and will provide 
further advice as necessary.

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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 
EMail to: uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 20 7821 1330 Ext 4511
Fax: +44 (0) 20 7821 1686

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 20 7821 1330 and follow the prompts

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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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