Queries for the Syslog table

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Find Linux kernel events

Find events reported by Linux kernel process, regarding killed processes.

// To create an alert for this query, click '+ New alert rule'
Syslog
| where ProcessName == "kernel" and SyslogMessage contains "Killed process"

All Syslog

Last 100 Syslog.

Syslog 
| top 100 by TimeGenerated desc

All Syslog with errors

Last 100 Syslog with erros.

Syslog 
| where SeverityLevel == "err" or  SeverityLevel == "error"
| top 100 by TimeGenerated desc

All Syslog by facility

All Syslog by facility.

Syslog 
| summarize count() by Facility

All Syslog by process name

All Syslog by process name.

Syslog 
| summarize count() by ProcessName

Users Added to Linux Group by Computer

Lists computers with users added to Linux group.

Syslog
| where Facility == 'authpriv' and SyslogMessage has 'to group' and (SyslogMessage has 'add' or SyslogMessage has 'added')
| summarize by Computer

New Linux Group Created by Computer

Lists computers with new Linux group created.

Syslog
| where Facility == 'authpriv' and SyslogMessage has 'new group'
| summarize count() by Computer

Failed Linux User Password Change

Lists computers wih failed Linux user password change.

Syslog
| where Facility == 'authpriv' and ((SyslogMessage has 'passwd:chauthtok' and SyslogMessage has 'authentication failure') or SyslogMessage has 'password change failed')
| summarize count() by Computer

Computers With Failed Ssh Logons

Lists computers with failed ssh logons.

Syslog
| where (Facility == 'authpriv' and SyslogMessage has 'sshd:auth' and SyslogMessage has 'authentication failure') or (Facility == 'auth' and ((SyslogMessage has 'Failed' and SyslogMessage has 'invalid user' and SyslogMessage has 'ssh2') or SyslogMessage has 'error: PAM: Authentication failure'))
| summarize count() by Computer

Computers With Failed Su Logons

Lists computers with failed su logons.

Syslog
| where (Facility == 'authpriv' and SyslogMessage has 'su:auth' and SyslogMessage has 'authentication failure') or (Facility == 'auth' and SyslogMessage has 'FAILED SU')
| summarize count() by Computer

Computers With Failed Sudo Logons

Lists computers with failed sudo logons.

Syslog
| where (Facility == 'authpriv' and SyslogMessage has 'sudo:auth' and (SyslogMessage has 'authentication failure' or SyslogMessage has 'conversation failed')) or ((Facility == 'auth' or Facility == 'authpriv') and SyslogMessage has 'user NOT in sudoers')
| summarize count() by Computer