Jonhnathan
61afb1c1c0
* Windows Rules Att&ck Mapping review * Bump updated_date and fix reference URLs * Fix subtechnique * Fix test errors
53 lines
1.6 KiB
TOML
53 lines
1.6 KiB
TOML
[metadata]
|
|
creation_date = "2020/12/15"
|
|
maturity = "production"
|
|
updated_date = "2021/09/23"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies the use of the Exchange PowerShell cmdlet, Set-CASMailbox, to add a new ActiveSync allowed device.
|
|
Adversaries may target user email to collect sensitive information.
|
|
"""
|
|
false_positives = ["Legitimate exchange system administration activity."]
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "New ActiveSyncAllowedDeviceID Added via PowerShell"
|
|
references = [
|
|
"https://www.volexity.com/blog/2020/12/14/dark-halo-leverages-solarwinds-compromise-to-breach-organizations/",
|
|
"https://docs.microsoft.com/en-us/powershell/module/exchange/set-casmailbox?view=exchange-ps",
|
|
]
|
|
risk_score = 47
|
|
rule_id = "ce64d965-6cb0-466d-b74f-8d2c76f47f05"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence"]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
process where event.type in ("start", "process_started") and
|
|
process.name: ("powershell.exe", "pwsh.exe") and process.args : "Set-CASMailbox*ActiveSyncAllowedDeviceIDs*"
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1098"
|
|
name = "Account Manipulation"
|
|
reference = "https://attack.mitre.org/techniques/T1098/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1098.002"
|
|
name = "Exchange Email Delegate Permissions"
|
|
reference = "https://attack.mitre.org/techniques/T1098/002/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|