defense_evasion_deleting_websvr_access_logs.toml

[metadata]
creation_date = "2020/11/03"
integration = ["endpoint", "windows"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
Identifies the deletion of WebServer access logs. This may indicate an attempt to evade detection or destroy forensic
evidence on a system.
"""
from = "now-9m"
index = ["auditbeat-*", "winlogbeat-*", "logs-endpoint.events.*", "logs-windows.sysmon_operational-*"]
language = "eql"
license = "Elastic License v2"
name = "WebServer Access Logs Deleted"
risk_score = 47
rule_id = "665e7a4f-c58e-4fc6-bc83-87a7572670ac"
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: Linux",
    "OS: Windows",
    "OS: macOS",
    "Use Case: Threat Detection",
    "Tactic: Defense Evasion",
    "Data Source: Elastic Defend",
    "Data Source: Sysmon",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
file where event.type == "deletion" and
  file.path : ("C:\\inetpub\\logs\\LogFiles\\*.log",
               "/var/log/apache*/access.log",
               "/etc/httpd/logs/access_log",
               "/var/log/httpd/access_log",
               "/var/www/*/logs/access.log")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1070"
name = "Indicator Removal"
reference = "https://attack.mitre.org/techniques/T1070/"


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