defense_evasion_generic_deletion.toml

[metadata]
creation_date = "2023/07/13"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/08/16"

[rule]
author = ["Elastic"]
description = """
This rule identifies the execution of commands that can be used to delete files and directories. Adversaries may delete
files and directories on a host system, such as logs, browser history, or malware.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "File or Directory Deletion Command"
risk_score = 21
rule_id = "5919988c-29e1-4908-83aa-1f087a838f63"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and 
(
  (process.name: "rundll32.exe" and process.args: "*InetCpl.cpl,Clear*") or 
  (process.name: "reg.exe" and process.args:"delete") or 
  (
    process.name: "cmd.exe" and process.args: ("*rmdir*", "*rm *", "rm") and
    not process.args : (
          "*\\AppData\\Local\\Microsoft\\OneDrive\\*",
          "*\\AppData\\Local\\Temp\\DockerDesktop\\*",
          "*\\AppData\\Local\\Temp\\Report.*",
          "*\\AppData\\Local\\Temp\\*.PackageExtraction"
    )
  ) or
  (process.name: "powershell.exe" and process.args: ("*rmdir", "rm", "rd", "*Remove-Item*", "del", "*]::Delete(*"))
) and not user.id : "S-1-5-18"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1070"
name = "Indicator Removal"
reference = "https://attack.mitre.org/techniques/T1070/"
[[rule.threat.technique.subtechnique]]
id = "T1070.004"
name = "File Deletion"
reference = "https://attack.mitre.org/techniques/T1070/004/"

[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"