increase in smb scans

From: Lee Ayres (ayres@i-dep.com)
Date: Fri Mar 08 2002 - 15:13:05 PST

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    SANS Newsbites SANS NewsBites Vol. 4 Num. 10 opens with the following
    paragraph.
    
    "Hackers are currently scanning the entire Internet looking for Windows
    systems with unprotected shares. They have found thousands or perhaps
    tens of thousands of vulnerable systems and installed remote-control
    bots on those systems.  If you have not checked your systems and your
    family's systems for open shares, now would be a very good time to
    find them and protect them."
    
    I can confirm that I have seen what looks like a steep increase in these
    scans as well.  
    
    Nathan W. Labadie writes:
     > Has anyone else noticed a _huge_ increase in SMB scans? I'm seeing sweeps 
     > of various subnets 5-10 times a day. This started around two weeks ago... 
     > they appear to be looking for open \\<netbios-name>\C shares. My guess is 
     > that there looking for machines previously infected with Nimda, but I 
     > could be wrong. It shows up as "NETBIOS SMB C access" under snort, and 
     > "Tree Connect AndX Request" when the tpcdump is viewed with ethereal. 
     > 
     > -- 
     > Nathan W. Labadie       | ab0781at_private	
     > Sr. Security Specialist | 313/577.2126
     > Wayne State University  | 313/577.1338 fax
     > C&IT Information Security Office: http://security.wayne.edu
     > 
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    -- 
    Lee Ayres <ayres@i-dep.com>
    Systems Security Administrator
    I-DEP, LLC
    
    phone number (312 738 0740)
    fax number   (312 738 0748)
    www.i-dep.com
    
    
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