Kerberos login failure detection

[Sharif Uddin <Sharif.Uddin () spectrumasa com>]

Hello


I would like to set up an alert for this in my network. I have found the following guide but the alert is not producing 
any results


http://foxtrot7security.blogspot.co.uk/2011/12/defeat-domain-user-spraying-brute_28.html


# ad login failed
alert tcp any 88 -> any any (msg:"Possible domain user spraying detected"; \
flow:established, to_client; \
content:"|05|"; offset:14; depth:15; \
content:"|1e|"; distance:4; within:1; \
content:"|18|"; distance:30; within:1; \
detection_filter:track by_dst, count 1, seconds 60; \
reference:url,foxtrot7security.blogspot.com/2011/12/defeat-domain-user-spraying-brute_28.html; \
classtype:attempted-user; \
sid:1000002; \
rev:0;)


pcap attached.



Sharif Uddin
Development/Support Engineer
-------------------

Spectrum Geo Ltd
Dukes Court, Duke Street
Woking, Surrey
GU21 5BH
UNITED KINGDOM

Tel: +44 (0) 1483 730201
Fax: +44 (0) 1483 762620

www.spectrumasa.com<http://www.spectrumasa.com/>


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Attachment: pan.pcap
Description: pan.pcap

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