custom app-id for unknown TCP application

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custom app-id for unknown TCP application

L1 Bithead

good day,

i know that answer might be simple but cannot find correct approach.

I have an application which identified as unknown-TCP and i have created pattern for it with few conditions.

now I have discovered that some devices behave different way and my pattern order not match, so I think to identify app based on first string in ASCII format.

for instance, I have following string in pcap:


My Agent 2.43 pour MSWIN32.


if i create such pattern as unknown-rsp-tcp-payload, it works. But I would like to avoid issue in case of other version for application, but when I use new pattern:


My Agent \d\.[\d]{0,}\s pour MSWin32


it fails to apply.

if I will convert everything to HEX, I am afraid to be depended on version number...


I am new to regex and would like to understand how to create these custom app-id, so please help.

May the Force be with You!

Cyber Elite
Cyber Elite

I'd give this a whirl

My Agent [0-9]\.[0-100] pour MSWin32


check out this areticlefor more information about RegEx

Tom Piens
PANgurus - Strata specialist; config reviews, policy optimization

Thankyou for reply!

returnes: can't handle two dfas next to each other in pattern


however, I have converted it to hex to exclude version from it, so now I have 2 HEX parts which I am trying to put in conditions...

probable it will work after I find how to add them normally.



May the Force be with You!
  • 2 replies
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