![]() ![]() The DoS attack has subsided and normal processing is being resumed. The Windows Filtering Platform has detected a DoS attack and entered a defensive mode packets associated with this attack will be discarded. The Windows Filtering Platform has blocked a packet.Ī more restrictive Windows Filtering Platform filter has blocked a packet. It’s important to keep an eye on these events to make sure any unexpected or unapproved actions are captured. Windows Filtering Platform is a set of API and system services that provide a platform for creating network filtering applications. Windows Firewall blocked an application from accepting incoming traffic Group Policy settings for Windows Firewall was changed EventIDĪ rule was added to the Windows Firewall exception listĪ rule was modified in the Windows Firewall exception listĪ setting was changed in Windows Firewall Unexpected and unauthorized rules and policies changes are strong indicators of threat, along with unapproved stopping of firewall services. While this may be disabled by system administrators, environments where the firewall is active can use the event logs to monitor for suspicious activity. Like all other actions, scheduled tasks are logged in Windows Events, and can be added to Splunk. In a recent security scare, the threat was seen creating scheduled tasks to perform actions that compromised data security. Log-on and log-off events are listed here as low priority. Without a larger planned event, where planned account activity is occurring, most of these Event IDs should remain low. Other user account events should not appear regularly for any one user. There will be holes in your logs if not fixed.Īn attempt was made to install a service.Ī typical user may appear in Windows logs for logging on and off a system. EventIDĪudit events have been dropped by transport. These are events a system administration should pay special attention to. While there are several different Event IDs to monitor for all aspects of IT Operations, a few important ones are listed here. Sub-codes begin with 0xC00000.Ħ4 (user doesn’t exist), 6A (bad password), 234 (user currently locked out), 72 (account disabled), 6F (logon outside of permitted times), 193 (account expiration)Ī user was added to a privileged global groupĪ user was added to a privileged local groupĪ user was added to a privileged universal group Kerberos Ticket-Granting-Ticket was denied because the device does not meet the access control restrictions.Ġx12 (account disabled), 0x18 (bad password), 0圆 (bad username) Probably want to investigate why.Ī Kerberos authentication ticket request failed These are Event IDs that indicate suspicious or unusual activity. Windows Security can include several of the other use cases listed below. Looking at a couple of general use cases, here is a list of Windows Event IDs to add when looking for specific information. The problem is the volume of information available means ingesting a large amount of non-relevant data into Splunk. Windows logs provide a wealth of information with every action taken. ![]() Splunk’s add-ons for Microsoft Windows, including Exchange and Active Directory, rely on Windows Event Logs being available and a forwarder used to send those logs into Splunk. Splunk is a widely accepted tool for log aggregation and analysis in both security and IT Ops use cases. By: Karl Cepull | Senior Director, Operational Intelligence ![]()
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