mmc_spawning_windows_shell

rule mmc_spawning_windows_shell {
 meta:
    author = "Karneades, Swisscom CSIRT"
    description = "Detects a Windows command line executable started from MMC.  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/sfP4jVTwSxrt"
    version = "0.01"
    created = "2021-03-09"
    category = "process_creation"
    product = "windows"
    mitre = "lateral_movement, t1175"

  events:
(re.regex($selection.principal.process.file.full_path, `.*\\mmc\.exe`) and (re.regex($selection.target.process.file.full_path, `.*\\cmd\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\powershell\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\wscript\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\cscript\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\sh\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\bash\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\reg\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\regsvr32\.exe`) or re.regex($selection.target.process.file.full_path, `.*\\BITSADMIN.*`)) and ($selection.metadata.product_event_type = "4688" or $selection.metadata.product_event_type = "1"))

  condition:
    $selection
}