Recent Increase in Port 139 Activity

[John Campbell <jcampbell () wsipc org>]

In the last week, I've started seeing one to several port sweeps per day on
port 139, of a particular nature.  Typically the sweep will hit .1 to .255
of a 24 bit net mask sized address block (generally called, "Class C"
although this can be erroneous) four times.  Have found nothing written on
any new worms targetting this port.  Source machines are largely North
American.  Anyone heard or have ideas about what's going on?  My perimeter
firewall's rejecting this traffic, so I get a log entry but no packet detail
(yet.)
 
John Campbell, Information Security Engineer
Washington School Information Processing Cooperative
 (WSIPC)
E-mail: jcampbell () wsipc org
 

 
 
 
 

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