psexec_tool_execution

rule psexec_tool_execution {
 meta:
    author = "Thomas Patzke"
    description = "Detects PsExec service installation and execution events (service and Sysmon)  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/YNK3AGI5NCcQ"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    mitre = "execution, t1035, s0029"

  events:
(($service_installation.target.process.command_line = "PSEXESVC" and (($service_installation.metadata.product_event_type = "7045" and re.regex($service_installation.target.process.command_line, `.*\\PSEXESVC\.exe`)) or $service_installation.metadata.product_event_type = "7036")) or ($service_installation.metadata.product_event_type = "1" and re.regex($service_installation.target.process.file.full_path, `.*\\PSEXESVC\.exe`) and $service_installation.principal.user.user_display_name = "NT AUTHORITY\\SYSTEM"))

  condition:
    $service_installation
}