privilege_escalation_printspooler_suspicious_file_deletion.toml

[metadata]
creation_date = "2021/07/06"
integration = ["endpoint", "windows"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
Detects deletion of print driver files by an unusual process. This may indicate a clean up attempt post successful
privilege escalation via Print Spooler service related vulnerabilities.
"""
false_positives = [
    """
    Uninstall or manual deletion of a legitimate printing driver files. Verify the printer file metadata such as
    manufacturer and signature information.
    """,
]
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.file-*", "logs-windows.sysmon_operational-*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Suspicious Print Spooler File Deletion"
references = ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527"]
risk_score = 47
rule_id = "c4818812-d44f-47be-aaef-4cfb2f9cc799"
setup = """## Setup

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
`event.ingested` to @timestamp.
For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
"""
severity = "medium"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Privilege Escalation",
    "Data Source: Elastic Endgame",
    "Use Case: Vulnerability",
    "Data Source: Elastic Defend",
    "Data Source: Sysmon",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
file where host.os.type == "windows" and event.type : "deletion" and
 not process.name : ("spoolsv.exe", "dllhost.exe", "explorer.exe") and
 file.path : "?:\\Windows\\System32\\spool\\drivers\\x64\\3\\*.dll"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1068"
name = "Exploitation for Privilege Escalation"
reference = "https://attack.mitre.org/techniques/T1068/"


[rule.threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"