Elastic low stable kql

ICMP Timestamp or Information Request from the Internet

Identifies inbound ICMP Timestamp (type 13) or Information (type 15) requests from external addresses to internal RFC1918 destinations. These message types are rarely used in modern networks and are commonly associated with host and path fingerprinting during reconnaissance.

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Detection Logic

data_stream.dataset:network_traffic.icmp
  and (network_traffic.icmp.request.type:(13 or 15) or icmp.request.type:(13 or 15))
  and destination.ip:(
    10.0.0.0/8 or
    172.16.0.0/12 or
    192.168.0.0/16
  )
  and not source.ip:(
    10.0.0.0/8 or
    100.64.0.0/10 or
    127.0.0.0/8 or
    169.254.0.0/16 or
    172.16.0.0/12 or
    192.168.0.0/16 or
    192.0.0.0/24 or
    192.0.0.0/29 or
    192.0.0.8/32 or
    192.0.0.9/32 or
    192.0.0.10/32 or
    192.0.0.170/32 or
    192.0.0.171/32 or
    192.0.2.0/24 or
    192.175.48.0/24 or
    192.31.196.0/24 or
    192.52.193.0/24 or
    192.88.99.0/24 or
    198.18.0.0/15 or
    198.51.100.0/24 or
    203.0.113.0/24 or
    224.0.0.0/4 or
    240.0.0.0/4 or
    "::1" or
    "FE80::/10" or
    "FF00::/8"
  )

Field Validations

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