Custom SIGs

I am trying to create a custom signature and manage. I went through the documentation and thought I was doing well, but apparently not.

I want at any time a certain file is copied over the network.

Any time that the 'honeypot.xls' file is copied on the network, I want that it triggers an alarm.

I tried the following:

A string of TCP and UDP.

Source ports - 135, 137, 139, 445

Service and service

Appreciate help with this.

BIZ

The files are transferred as unicode with SMB strings. To match, you add between the characters, null values

Try this as a RegexString:

\x00[hh]\x00[OO]\x00[NN]\x00[EE]\x00[YY]\x00[pp]\x00[OO]\x00[TT]\x00

Tags: Cisco Security

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