Using Promtail for certain security events

Grafana Loki
1

Hello ,
I am trying filter certain windows security events of interest and relabel some fields, see example below , but i don’t have any results yet , any help example would be appreciated
Thanks

server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: C:/Users/administrator.DALET/Downloads/promtail/positions.yaml

clients:
  - url: http://172.18.9.44:3100/loki/api/v1/push

scrape_configs:
  - job_name: windows_event_logs
    pipeline_stages:
      - match:
          selector: '{event_id="6272"}'
          stages:
            - output:
                source: windows_events
                labels:
                  event_id: "6272"


    static_configs:
      - targets:
          - localhost
        labels:
          job: windows_logs
          host: SRV-AD01
2

Welcome

For test purposes can you start out without any filter and see if it gets you any data at all?

If no data comes through then you know your got other issues

3

Hello,

Thanks for answering , i get lots of data but all events and i would like to filter only desired events, then label data inside
Thanks

4

Please post a sample of the data you are seeing without the filter?

5

promtail
promtail1805×744 159 KB 

	2023-05-22 09:07:59.311	(no unique labels)	
{
  "source": "Microsoft-Windows-Security-Auditing",
  "channel": "Security",
  "computer": server.local",
  "event_id": 4624,
  "version": 2,
  "task": 12544,
  "levelText": "Information",
  "taskText": "Logon",
  "opCodeText": "Info",
  "keywords": "Audit Success",
  "timeCreated": "2023-05-22T06:07:58.178054200Z",
  "eventRecordID": 3269032672,
  "execution": {
    "processId": 788,
    "threadId": 7336,
    "processName": "lsass.exe"
  },
  "event_data": "<Data Name='SubjectUserSid'>S-1-5-18</Data><Data Name='SubjectUserName'>server$</Data><Data Name='SubjectDomainName'>domain</Data><Data Name='SubjectLogonId'>0x3e7</Data><Data Name='TargetUserSid'>S-1-5-21-2752612933-1646568981-4245257801-1430</Data><Data Name='TargetUserName'>ldap_search</Data><Data Name='TargetDomainName'>domain</Data><Data Name='TargetLogonId'>0xa3f101aeb</Data><Data Name='LogonType'>3</Data><Data Name='LogonProcessName'>Advapi  </Data><Data Name='AuthenticationPackageName'>MICROSOFT_AUTHENTICATION_PACKAGE_V1_0</Data><Data Name='WorkstationName'>server</Data><Data Name='LogonGuid'>{00000000-0000-0000-0000-000000000000}</Data><Data Name='TransmittedServices'>-</Data><Data Name='LmPackageName'>-</Data><Data Name='KeyLength'>0</Data><Data Name='ProcessId'>0x314</Data><Data Name='ProcessName'>C:\\Windows\\System32\\lsass.exe</Data><Data Name='IpAddress'>172.18.13.46</Data><Data Name='IpPort'>45050</Data><Data Name='ImpersonationLevel'>%%1833</Data><Data Name='RestrictedAdminMode'>-</Data><Data Name='TargetOutboundUserName'>-</Data><Data Name='TargetOutboundDomainName'>-</Data><Data Name='VirtualAccount'>%%1843</Data><Data Name='TargetLinkedLogonId'>0x0</Data><Data Name='ElevatedToken'>%%1842</Data>",
  "message": "An account was successfully logged on.\r\n\r\nSubject:\r\n\tSecurity ID:\t\tS-1-5-18\r\n\tAccount Name:\t\tDLT-BSH-AD01$\r\n\tAccount Domain:\t\tdomain\r\n\tLogon ID:\t\t0x3E7\r\n\r\nLogon Information:\r\n\tLogon Type:\t\t3\r\n\tRestricted Admin Mode:\t-\r\n\tVirtual Account:\t\tNo\r\n\tElevated Token:\t\tYes\r\n\r\nImpersonation Level:\t\tImpersonation\r\n\r\nNew Logon:\r\n\tSecurity ID:\t\tS-1-5-21-2752612933-1646568981-4245257801-1430\r\n\tAccount Name:\t\tldap_search\r\n\tAccount Domain:\t\tdomain\r\n\tLogon ID:\t\t0xA3F101AEB\r\n\tLinked Logon ID:\t\t0x0\r\n\tNetwork Account Name:\t-\r\n\tNetwork Account Domain:\t-\r\n\tLogon GUID:\t\t{00000000-0000-0000-0000-000000000000}\r\n\r\nProcess Information:\r\n\tProcess ID:\t\t0x314\r\n\tProcess Name:\t\tC:\\Windows\\System32\\lsass.exe\r\n\r\nNetwork Information:\r\n\tWorkstation Name:\tserver\r\n\tSource Network Address:\t172.18.13.46\r\n\tSource Port:\t\t45050\r\n\r\nDetailed Authentication Information:\r\n\tLogon Process:\t\tAdvapi  \r\n\tAuthentication Package:\tMICROSOFT_AUTHENTICATION_PACKAGE_V1_0\r\n\tTransited Services:\t-\r\n\tPackage Name (NTLM only):\t-\r\n\tKey Length:\t\t0\r\n\r\nThis event is generated when a logon session is created. It is generated on the computer that was accessed.\r\n\r\nThe subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.\r\n\r\nThe logon type field indicates the kind of logon that occurred. The most common types are 2 (interactive) and 3 (network).\r\n\r\nThe New Logon fields indicate the account for whom the new logon was created, i.e. the account that was logged on.\r\n\r\nThe network fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.\r\n\r\nThe impersonation level field indicates the extent to which a process in the logon session can impersonate.\r\n\r\nThe authentication information fields provide detailed information about this specific logon request.\r\n\t- Logon GUID is a unique identifier that can be used to correlate this event with a KDC event.\r\n\t- Transited services indicate which intermediate services have participated in this logon request.\r\n\t- Package name indicates which sub-protocol was used among the NTLM protocols.\r\n\t- Key length indicates the length of the generated session key. This will be 0 if no session key was requested."
}
1 Like
6

Wonder if the issue is the quotation marks?
The value is an int 6272 but your filter is string “6272”

7

Hello ,
when changing to int i get error
Thanks