defense_evasion_process_termination_followed_by_deletion.toml

[metadata]
creation_date = "2020/11/04"
maturity = "production"
updated_date = "2021/09/23"

[rule]
author = ["Elastic"]
description = """
Identifies a process termination event quickly followed by the deletion of its executable file. Malware tools and other
non-native files dropped or created on a system by an adversary may leave traces to indicate to what occurred. Removal
of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's
footprint.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Process Termination followed by Deletion"
risk_score = 47
rule_id = "09443c92-46b3-45a4-8f25-383b028b258d"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
type = "eql"

query = '''
sequence by host.id with maxspan=5s
   [process where event.type == "end" and 
    process.code_signature.trusted == false and
    not process.executable : ("C:\\Windows\\SoftwareDistribution\\*.exe", "C:\\Windows\\WinSxS\\*.exe")
   ] by process.executable
   [file where event.type == "deletion" and file.extension : ("exe", "scr", "com")] by file.path
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1070"
name = "Indicator Removal on Host"
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/"