MITRE ATT&CK T1003 RW Mimikatz

// Copyright 2023 Google LLC. Licensed under Apache-2.0.

rule rw_mimikatz_T1003 {

  meta:
    author = "Google Cloud Security"
    description = "Detects the process mimikatz being issued from the command line."
    rule_id = "mr_fa96ead4-7f1f-4dbb-bacb-a526f985c12f"
    rule_name = "MITRE ATT&CK T1003 RW Mimikatz"
    tactic = "TA0006"
    technique = "T1003"
    type = "alert"
    platform = "Windows"
    data_source = "microsoft sysmon, microsoft windows events"
    severity = "Critical"
    priority = "High"

  events:
    $process.metadata.event_type = "PROCESS_LAUNCH"
    $process.metadata.event_type = $event_type
    $process.target.process.command_line = /mimikatz/ nocase

  match:
    $event_type over 5m

  outcome:
    $risk_score = 95
    $event_count = count_distinct($process.metadata.id)
    // added to populate alert graph with additional context
    $principal_hostname = array_distinct($process.principal.hostname)
    $principal_process_pid = array_distinct($process.principal.process.pid)
    $principal_process_command_line = array_distinct($process.principal.process.command_line)
    $principal_process_file_sha256 = array_distinct($process.principal.process.file.sha256)
    $principal_process_file_full_path = array_distinct($process.principal.process.file.full_path)
    $principal_process_product_specific_process_id = array_distinct($process.principal.process.product_specific_process_id)
    $principal_process_parent_process_product_specific_process_id = array_distinct($process.principal.process.parent_process.product_specific_process_id)
    $target_process_pid = array_distinct($process.target.process.pid)
    $target_process_command_line = array_distinct($process.target.process.command_line)
    $target_process_file_sha256 = array_distinct($process.target.process.file.sha256)
    $target_process_file_full_path = array_distinct($process.target.process.file.full_path)
    $target_process_product_specific_process_id = array_distinct($process.target.process.product_specific_process_id)
    $principal_user_userid = array_distinct($process.principal.user.userid)

  condition:
    $process
}