Re: Steady stream of probe email messages.

[Dave <d () securi-d com>]

Maybe they are verifying real e-mail addresses? If they get a bounce message e-mail address = bad.

Sent from my iPad

On Jul 21, 2012, at 3:59 PM, David Kovar <dkovar () gmail com> wrote:

> Aaron,
>
> Alas, there is no content at all, no text, no HTML, nothing ....
>
> -David
>
> On Jul 21, 2012, at 12:57 PM, Aaron Melton wrote:
>
> > David,
> >
> > Are these messages in plain text or HTML format?
> >
> > Could they be imbedding objects in the HTML to do reconnaissance of the
> > system/network?
> >
> > Aaron
> >
> > On 7/20/12 7:29 PM, David Kovar wrote:
> > > Good evening,
> > >
> > > A mid-sized high tech client got a new CEO a few months ago. Since coming on board, he's received a steady stream 
> > > of probe email addresses from a wide variety of throw away email address. The addresses are most often Gmail 
> > > accounts with random letters for the name and for the address. The subject line and message body are often blank, 
> > > but they occasionally contain "Hello". There is no malicious payload. No other messages arrive from the same 
> > > address to any employee and the sender's address doesn't show up via any searches I've conducted.
> > >
> > > Any speculation on the purpose of these messages?
> > > Any ideas on how to trace them back to someone?
> > > Any ideas on how to stop them?
> > > Anyone else seeing this?
> > >
> > > -David
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