sigma-rules/hunting/windows/docs/windows_logon_activity_by_source_ip.md

Windows Logon Activity by Source IP

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Metadata

• Author: Elastic

• Description: This hunt returns a summary of network logon activity by source.ip using Windows event IDs 4624 and 4625. The higher the number of failures, low success and multiple accounts the more suspicious the behavior is.

• UUID: 441fba85-47a9-4f1f-aab4-569bbfdc548b

• Integration: system

• Language: [ES|QL]

• Source File: Windows Logon Activity by Source IP

Query

from logs-system.security-*
| where  @timestamp > now() - 7 day
| where host.os.family == "windows" and
  event.category == "authentication" and event.action in ("logon-failed", "logged-in") and winlog.logon.type == "Network" and
  source.ip is not null and
  /* noisy failure status codes often associated to authentication misconfiguration */
  not (event.action == "logon-failed" and winlog.event_data.Status in ("0xC000015B", "0XC000005E", "0XC0000133", "0XC0000192"))
| eval failed = case(event.action == "logon-failed", source.ip, null), success = case(event.action == "logged-in", source.ip, null)
| stats count_failed = count(failed), count_success = count(success), count_user = count_distinct(winlog.event_data.TargetUserName) by source.ip
 /* below threshold should be adjusted to your env logon patterns */
| where count_failed >= 100 and count_success <= 10 and count_user >= 20

Notes

• Pay close attention to IP address sources with a high number of failed connections associated with low success attempts and high number of user accounts.

MITRE ATT&CK Techniques

• T1110
• T1110.001
• T1110.003

License

• Elastic License v2