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Merged
patel-bhavin merged 1 commit into from
Jan 23, 2020
Merged

adding definitions #322

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4 changes: 2 additions & 2 deletions detections/clients_connecting_to_multiple_dns_servers.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ detect:
splunk:
correlation_rule:
macros:
- clients_connecting_to_multiple_dns_servers_filter
- clients_connecting_to_multiple_dns_servers_output_filter
notable:
nes_fields: src, dest
rule_description: This search allows you to identify the endpoints that have
Expand All @@ -35,7 +35,7 @@ detect:
search: '| tstats `security_content_summariesonly` count, values(DNS.dest) AS dest dc(DNS.dest)
as dest_count from datamodel=Network_Resolution where DNS.message_type=QUERY
by DNS.src | `drop_dm_object_name("Network_Resolution")` |where dest_count
> 5 | `clients_connecting_to_multiple_dns_servers_filter`'
> 5 | `clients_connecting_to_multiple_dns_servers_output_filter`'
suppress:
suppress_fields: src
suppress_period: 86400s
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4 changes: 2 additions & 2 deletions detections/dns_record_changed.yml
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Expand Up @@ -22,7 +22,7 @@ detect:
lookups:
- discovered_dns_records
macros:
- dns_record_changed_filter
- dns_record_changed_output_filter
notable:
nes_fields: src
rule_description: The table represents a list of DNS records and their responses
Expand All @@ -44,7 +44,7 @@ detect:
| rename DNS.query as query | where query!="unknown" | rex field=query "(?<domain>\w+\.\w+?)(?:$|/)"]
| makemv delim=" " answer | makemv delim=" " type | sort -count | table count,src,domain,type,query,current_answer,discovered_answer
| makemv current_answer | mvexpand current_answer | makemv discovered_answer
| eval n=mvfind(discovered_answer, current_answer) | where isnull(n) | `dns_record_changed_filter`'
| eval n=mvfind(discovered_answer, current_answer) | where isnull(n) | `dns_record_changed_output_filter`'
suppress:
suppress_fields: src
suppress_period: 28800s
Expand Down
3 changes: 2 additions & 1 deletion macros/clients_connecting_to_multiple_dns_servers.yml
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@@ -1,2 +1,3 @@
description: Use this macro to add additional filters for monitoring clients connecting to multiple dns servers
name: clients_connecting_to_multiple_dns_servers_filter
name: clients_connecting_to_multiple_dns_servers_output_filter
definition: search *
3 changes: 2 additions & 1 deletion macros/dns_record_changed_filter.yml
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@@ -1,2 +1,3 @@
description: Use this macro to add additional filters for monitoring DNS records changed
name: dns_record_changed_filter
name: dns_record_changed_output_filter
definition: search *