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spambot monitoring software

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#1 CtrlAltDale


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Posted 18 January 2013 - 07:19 AM

I've just had to deal with a spambot infection on a client PC of an SBS 2003 served LAN. Just to make sure I really have dealt with the issue, are there any point and shoot apps to monitor port 25 for unusual activity? I've tried using wireshark on the SBS server but there's just too much traffic for it not to die on me with a memory error after a few minutes. I'm sure there's a way to only capture smtp (instead of capturing everything just filtering SMTP) but I'd rather use a simpler more dedicated tool if there's one available.

If possible I'd like to monitor the source and destination IP addresses, the port, the application sending it. I'm not bothered about the email contents but the sender, receiver and subject might be useful.

Failing that, some instructions on how to use Wireshark to only capture SMTP data would work at a pinch.

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#2 Didier Stevens

Didier Stevens

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Posted 18 January 2013 - 08:33 AM

Is there an anti-virus on that SBS server? There are several AV products that monitor and filter traffic to port 25.
For example, McAfee Enterprise allows you to specify which processes (for example outlook.exe) can access port 25, all other are blocked and reported.

Didier Stevens

SANS ISC Senior Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019


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