Samirbous
50bb821708
* [Rules Tuning] Add support for Sysmon ImageLoad Events added correct event.category and event.action to rules using library events to support sysmon eventid 7. `event.category == "library"` --> `(event.category == "process" and event.action : "Image loaded*")` `dll.name` --> `file.name` * added Suspicious RDP ActiveX Client Loaded * Delete workspace.xml
54 lines
1.8 KiB
TOML
54 lines
1.8 KiB
TOML
[metadata]
|
|
creation_date = "2020/11/29"
|
|
maturity = "production"
|
|
updated_date = "2022/08/02"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
A scheduled task was created by a Windows script via cscript.exe, wscript.exe or powershell.exe. This can be abused by
|
|
an adversary to establish persistence.
|
|
"""
|
|
false_positives = ["Legitimate scheduled tasks may be created during installation of new software."]
|
|
from = "now-9m"
|
|
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Scheduled Task Created by a Windows Script"
|
|
note = """## Triage and analysis
|
|
|
|
Decode the base64 encoded Tasks Actions registry value to investigate the task's configured action."""
|
|
risk_score = 47
|
|
rule_id = "689b9d57-e4d5-4357-ad17-9c334609d79a"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence"]
|
|
type = "eql"
|
|
|
|
query = '''
|
|
sequence by host.id with maxspan = 30s
|
|
[any where (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
|
|
(dll.name : "taskschd.dll" or file.name : "taskschd.dll") and
|
|
process.name : ("cscript.exe", "wscript.exe", "powershell.exe", "pwsh.exe", "powershell_ise.exe")]
|
|
[registry where registry.path : "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\*\\Actions"]
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1053"
|
|
name = "Scheduled Task/Job"
|
|
reference = "https://attack.mitre.org/techniques/T1053/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1053.005"
|
|
name = "Scheduled Task"
|
|
reference = "https://attack.mitre.org/techniques/T1053/005/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|