Sysmon Configuration Update

A Sigma rule for process creation on Windows, by Nasreddine Bencherchali (Nextron Systems).

medium 1 ATT&CK technique 3 programs it names 3 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_cli:
    CommandLine|contains|windash: '-c'
  selection_pe:
    - Image|endswith:
        - '\Sysmon64.exe'
        - '\Sysmon64a.exe'
        - '\Sysmon.exe'
    - Description: 'System activity monitor'
  condition: all of selection_*

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Nasreddine Bencherchali (Nextron Systems), under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

Command lines that trip it

everyday examples from tldr-pages, CC BY 4.0, each read by CmdID

To dump the current configuration, run the following command on the page for sysmon

sysmon -cIdentify

To reset the configuration to default settings, run the following command on the page for sysmon

sysmon -c --Identify

To reconfigure Sysmon with a configuration file, run the following command on the page for sysmon

sysmon -c c:\windows\config.xmlIdentify

Programs and files it names

their pages here

sysmonSysmon.exeSysmon64.exe

ATT&CK

the techniques it is tagged with

T1685Disable or Modify Tools

Sysmon Configuration Update

What it looks for

Command lines that trip it

Programs and files it names

ATT&CK

Other rules for T1685 Disable or Modify Tools