Merge pull request #2067 from splunk/mac_os_detection

MacOS detections

detections/endpoint/macos_lolbin.yml

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+name: MacOS LOLbin
+id: 58d270fb-5b39-418e-a855-4b8ac046805e
+version: 1
+date: '2022-03-04'
+author: Patrick Bareiss, Splunk
+type: TTP
+datamodel:
+- Endpoint
+description: Detect multiple executions of Living off the Land (LOLbin) binaries in a
+  short period of time. 
+search: '`osquery` name=es_process_events columns.cmdline IN ("find*", "crontab*", "screencapture*", "openssl*", "curl*", "wget*", "killall*", "funzip*")
+  | rename columns.* as *
+  | stats  min(_time) as firstTime max(_time) as lastTime values(cmdline) as cmdline, values(pid) as pid, values(parent) as parent, values(path) as path, 
+  values(signing_id) as signing_id,  dc(path) as dc_path by username host
+  | rename username as User, cmdline as process, path as process_path
+  | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`
+  | `macos_lolbin_filter`'
+how_to_implement: This detection uses osquery and endpoint security on MacOS.
+  Follow the link in references, which describes how to setup process auditing in MacOS
+  with endpoint security and osquery.
+known_false_positives: None identified.
+references:
+- https://osquery.readthedocs.io/en/stable/deployment/process-auditing/
+tags:
+  analytic_story:
+  - Living Off The Land
+  asset_type: Endpoint
+  cis20:
+  - CIS 3
+  - CIS 5
+  - CIS 16
+  confidence: 50
+  context:
+  - Source:Endpoint
+  - Stage:Execution
+  dataset:
+  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.004/macos_lolbin/osquery.log
+  impact: 50
+  kill_chain_phases:
+  - Actions on Objectives
+  message: Multiplle LOLbin are executed on host $host$ by user $user$
+  mitre_attack_id:
+  - T1059.004
+  - T1059
+  nist:
+  - DE.CM
+  observable:
+  - name: user
+    type: User
+    role:
+    - Victim
+  - name: process
+    type: Process
+    role:
+    - Child Process
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - _time
+  - columns.cmdline
+  - columns.pid
+  - columns.parent
+  - columns.path
+  - columns.signing_id
+  - columns.username
+  - host
+  risk_score: 25
+  security_domain: endpoint

macros/osquery.yml

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+definition: sourcetype=osquery:results
+description: customer specific splunk configurations(eg- index, source, sourcetype).
+  Replace the macro definition with configurations for your Splunk Environmnent.
+name: osquery

tests/endpoint/macos_lolbin.yml

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+name: MacOS LOLbin Unit Test
+tests:
+- name: MacOS LOLbin
+  file: endpoint/macos_lolbin.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: '-24h'
+  latest_time: 'now'
+  attack_data:
+  - file_name: osquery.log
+    data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.004/macos_lolbin/osquery.log
+    source: osquery
+    sourcetype: osquery:results