Terrance DeJesus
e8c39d19a7
* initial commit with eggshell mitre mapping added * adding updated rules * [Rule Tuning] MITRE for GCP rules I've added Mitre references for the 4 GCP rules missing. Changed 3 of the rules from "Impact" to "Defense Evasion" based on the technique used and it's matched tactic. * [Rule Tuning] Endgame Rule name updates for Mitre Updated Endgame rule names for those with Mitre tactics to match the tactics. * Update rules/integrations/aws/persistence_redshift_instance_creation.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update rules/integrations/aws/exfiltration_rds_snapshot_restored.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * adding 10 updated rules for google_workspace, ml and o365 * adding 22 rule updates for mitre att&ck mappings * adding 24 rule updates related mainly to ML rules * adding 3 rules related to detection via ML * adding adjustments * adding adjustments with solutions to recent pytest errors * removed tabs from tags * adjusted mappings and added techniques * adjusted endgame rule mappings per review * adjusted names to match different tactics * added execution and defense evasion tag * adjustments to address errors from merging with main * added newlines to rules missing them at the end of the file Co-authored-by: imays11 <59296946+imays11@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
57 lines
2.0 KiB
TOML
57 lines
2.0 KiB
TOML
[metadata]
|
|
creation_date = "2020/12/15"
|
|
maturity = "production"
|
|
updated_date = "2022/07/20"
|
|
|
|
[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"
|
|
note = """## 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 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
|
|
"""
|
|
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", "powershell_ise.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 = "Additional 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/"
|
|
|