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Strangers In the Night

By Wietse Venema, November 01, 2000

There's no telling what intruders might leave behind when they break into your system overnight. Wietse describes how he analyzed an unknown program left behind by one intruder.
Nov00: Strangers In the Night 

<b>	(a)</b>
	Feb 13 23:09:52 wsbs06 in.fingerd[15900]: connect from lock@wsbs03

<b>	(b)</b>
	Feb 13 23:05:34 wsbs01 in.fingerd[7948]: connect from root@wsbs03
	Feb 13 23:05:35 wsbs06 in.fingerd[15895]: connect from nobody@wsbs01
	Feb 13 23:05:36 wsbs06 in.fingerd[15897]: refused connect from nobody@localhost
	
	<IMG src="http://twimgs.com/ddj/ddj/images/ddj0011g/0011gf1.gif" ALT="" WIDTH="278" HEIGHT="79" ALIGN="middle">

Figure 1: (a) A strange message that appeared on my workstation's console window; (b) an unusual chain of finger connections.



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