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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2006.0005 -- AUSCERT ALERT
                                   [Win]
            Increased activity of mass-mailer W32.Blackmal.E@mm
                              19 January 2006

===========================================================================

        AusCERT Alert Summary
        ---------------------

Platform:          Windows
Impact:            Execute Arbitrary Code/Commands
Access:            Remote/Unauthenticated

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PROBLEM:  

        AusCERT has detected high levels of a new mass-mailer called 
        W32.Blackmal.E@mm (aka: W32/Nyxem-D, WORM_GREW.A, W32/MyWife.d@MM, 
        VB.bi).
        
        This virus spreads via email attachments and open network shares on 
        Windows systems. Incoming email has a spoofed From: address and the 
        following attributes:

        One of the following subjects:

                - *Hot Movie*
                - A Great Video
                - Fw:
                - Fw: DSC-00465.jpg
                - Fw: Funny :)
                - Fw: Picturs
                - Fw: Real show
                - Fw: SeX.mpg
                - Fw: Sexy
                - Fwd: Crazy illegal Sex!
                - Fwd: image.jpg
                - Fwd: Photo
                - give me a kiss
                - Miss Lebanon 2006
                - My photos
                - Part 1 of 6 Video clipe
                - Photos
                - Re:
                - School girl fantasies gone bad

        The attachment may have a variety of names and (irregular) 
        extensions including:

                - 007.pif
                - 392315089702606E-02,.scR
                - 677.pif
                - Adults_9,zip.sCR
                - Arab sex DSC-00465.jpg
                - ATT01.zip.sCR
                - Attachments[001],B64.sCr
                - Clipe,zip.sCr
                - document.pif
                - DSC-00465.Pif
                - DSC-00465.pIf
                - eBook.pdf
                - eBook.PIF
                - image04.pif
                - New Video,zip
                - New_Document_file.pif
                - photo.pif
                - Photos,zip.sCR
                - School.pif
                - SeX,zip.scR
                - Sex.mim
                - Video_part.mim
                - WinZip,zip.scR
                - WinZip.BHX
                - WinZip.zip.sCR
                - Word XP.zip.sCR
                - Word.zip.sCR
                - 04.pif
                - DSC-00465.Pif
                - DSC-00465.pIf
                - image04.pif
                - 3.92315089702606E02.UUE
                - Attachments[001].B64
                - Attachments00.HQX
                - Attachments001.BHX
                - eBook.Uu
                - Original Message.B64
                - Sex.mim
                - SeX.mim
                - Video_part.mim
                - WinZip.BHX
                - Word_Document.hqx
                - Word_Document.uu


IMPACT:   

        Once a computer is infected with W32.Blackmal.E@mm, it will begin 
        sending out email in an attempt to self propagate. It obtains 
        target email addresses from files with an extension of: .htm, 
        .dbx,.eml, .msg, .oft, .nws, .vcf, .mbx, .imh, .txt, .msf.

        The virus will also perform the following:

                - Add a key to the registry to enable it at startup:
                  HKLM\Software\Microsoft\Windows\CurrentVersion\Run
                  "ScanRegistry" = "%System%\scanregw.exe"

                - Attempt to disable anti-virus software.

                - Creates copies of itself in shared directories (ADMIN$ 
                  and C$) with the name WINZIP_TMP.exe.

                - Contact the website: webstats.web.rcn.net

MITIGATION: 

        System Administrators should update their antivirus programs to the
        latest definitions. Users should ensure that they do not open email
        attachments they are not expecting or that have extensions such as
        those listed above. Unknown executable files found in shared 
        directories should not be run.

        Removal tools for W32.Blackmal.E@mm are available from anti-virus
        vendors.  AusCERT encourages administrators to visit their 
        appropriate anti-virus vendor's web site (see REFERENCES below) 
        for additional information.

        More information on protecting a Windows PC from malicious code can
        be obtained from:

                http://www.auscert.org.au/3352


REFERENCES:

        - http://www.sarc.com/avcenter/venc/data/w32.blackmal.e@mm.html
        - http://www.sophos.com/virusinfo/analyses/w32nyxemd.html
        - http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM%5FGREW%2EA
        - http://vil.nai.com/vil/content/v_138027.htm
        - http://www.f-secure.com/v-descs/vb_bi.shtml

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You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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