[metadata]
creation_date = "2023/08/28"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/08/28"

[rule]
author = ["Elastic"]
description = """
This rule monitors for the creation of a file, followed by its execution and self-deletion in a short timespan within a
directory often used for malicious purposes by threat actors. This behavior is often used by malware to execute 
malicious code and delete itself to hide its tracks.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "File Creation, Execution and Self-Deletion in Suspicious Directory"
risk_score = 47
rule_id = "09bc6c90-7501-494d-b015-5d988dc3f233"
severity = "medium"
tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Defend"]
type = "eql"
query = '''
sequence by host.id, user.id with maxspan=1m
  [file where host.os.type == "linux" and event.action == "creation" and 
   process.name in ("curl", "wget", "fetch", "ftp", "sftp", "scp", "rsync", "ld") and 
   file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
     "/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
  [process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and 
   process.parent.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")] by process.name
  [file where host.os.type == "linux" and event.action == "deletion" and not process.name in ("rm", "ld") and 
   file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
     "/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
'''

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

[[rule.threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"

[[rule.threat.technique.subtechnique]]
id = "T1059.004"
name = "Unix Shell"
reference = "https://attack.mitre.org/techniques/T1059/004/"

[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"