sysmon_service_enumeration

rule sysmon_service_enumeration {
 meta:
    author = "Osman Demir"
    description = "Detects Sysmon Enumeration Activity  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/DnN9qhks24Tp"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "powershell"
    mitre = "discovery, t1063"

  events:
(re.regex($selection.target.process.command_line, `ls HKLM:\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WINEVT\\Channels | Where-Object \\{$_\.name -like \".*sysmon.*\"\\}`) or $selection.target.process.command_line = "ls HKCU:\\Software\\Sysinternals  | Select-Object name" or $selection.target.process.command_line = "Get-CimInstance win32_service -Filter \"Description = 'System Monitor service'\"")

  condition:
    $selection
}