detection_of_powershell_execution_via_dll

rule detection_of_powershell_execution_via_dll {
 meta:
    author = "Markus Neis"
    description = "Detects PowerShell Strings applied to rundllas seen in PowerShdll.dll  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/YGMicuRcvEJn"
    version = "0.01"
    created = "2018/08/25"
    category = "process_creation"
    product = "windows"
    mitre = "execution, t1086"

  events:
(($selection1.metadata.product_event_type = "4688" or $selection1.metadata.product_event_type = "1") and (re.regex($selection1.target.process.file.full_path, `.*\\rundll32\.exe`) or re.regex($selection1.metadata.description, `.*Windows-Hostprozess \(Rundll32\).*`)) and (re.regex($selection1.target.process.command_line, `.*Default\.GetString.*`) or re.regex($selection1.target.process.command_line, `.*FromBase64String.*`)))

  condition:
    $selection1
}