nextcloud apache2

apache2-logs.yaml

#Apache access/errors logs
#debug: true
filter: "evt.Parsed.program startsWith 'apache2'"
onsuccess: next_stage
name: crowdsecurity/apache2-logs
description: "Parse Apache2 access and error logs"
#log line can be prefixed by a target_fqdn
pattern_syntax:
  NC_APACHE2: '%{IPORHOST:clientip} %{DATA:forwardedip} %{HTTPDUSER:ident} %{USER:auth} \[%{HTTPDATE:timestamp}\] "(?:%{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})" %{NUMBER:response} (?:%{NUMBER:bytes}|-)'
nodes:
  - grok:
      pattern: '(%{IPORHOST:target_fqdn}(:%{INT:port})? )?%{NC_APACHE2}( "%{NOTDQUOTE:referrer}" "%{NOTDQUOTE:http_user_agent}")?'
      apply_on: message
      # these ones apply for both grok patterns
      statics:
        - meta: log_type
          value: http_access-log
        - target: evt.StrTime
          expression: evt.Parsed.timestamp
        - meta: service
          value: http
        - meta: source_ip
          expression: evt.Parsed.clientip
        - meta: http_status
          expression: evt.Parsed.response
        - meta: http_path
          expression: evt.Parsed.request
        - meta: http_verb
          expression: "evt.Parsed.verb"
        - meta: http_user_agent
          expression: "evt.Parsed.http_user_agent"
        - meta: target_fqdn
          expression: "evt.Parsed.target_fqdn"
    onsuccess: next_stage
  - grok:
      pattern: '%{HTTPD_ERRORLOG}'
      apply_on: message
    onsuccess: next_stage
    pattern_syntax:
      NOT_DOUBLE_POINT: '[^:]+'
      NOT_DOUBLE_QUOTE: '[^"]+'    
    nodes:
      - filter: "evt.Parsed.module == 'auth_basic'"
        onsuccess: next_stage
        pattern_syntax:
          EXTRACT_USER_AND_PATH: 'user %{NOT_DOUBLE_POINT:username}: authentication failure for "%{NOT_DOUBLE_QUOTE:target_uri}": Password Mismatch'
          EXTRACT_USER_AND_PATH2: 'user %{NOT_DOUBLE_POINT:username} not found: "?%{NOT_DOUBLE_QUOTE:target_uri}"?'
        grok:
          pattern: '%{EXTRACT_USER_AND_PATH}|%{EXTRACT_USER_AND_PATH2}'
          apply_on: message
          # these ones apply for both grok patterns
        statics:
          - meta: username
            expression: evt.Parsed.username
          - meta: http_path
            expression: evt.Parsed.target_uri
          - meta: sub_type
            value: "auth_fail"
      - filter: "evt.Parsed.module == 'core' && evt.Parsed.message contains 'Invalid URI'"
        onsuccess: next_stage
        pattern_syntax:
          EXTRACT_URIVERB: 'Invalid URI in request %{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})'
        grok:
          pattern: '%{EXTRACT_URIVERB}'
          apply_on: message
        statics:
          - meta: http_path
            expression: evt.Parsed.request
          - meta: sub_type
            value: "invalid_uri"
      - filter: "evt.Parsed.module == 'authz_core' && evt.Parsed.message contains 'client denied'"
        onsuccess: next_stage
        pattern_syntax:
          EXTRACT_PATH: 'client denied by server configuration: %{GREEDYDATA:target_uri}'
        grok:
          pattern: '%{EXTRACT_PATH}'
          apply_on: message
        statics:
          - meta: http_path
            expression: evt.Parsed.target_uri
          - meta: sub_type
            value: "permission_denied"
    statics:
      - meta: log_type
        value: http_error-log
      - target: evt.StrTime
        expression: evt.Parsed.timestamp
      - meta: service
        value: http
      - meta: source_ip
        expression: evt.Parsed.client
      - meta: http_status
        expression: evt.Parsed.response