Mika Ayenson, PhD
8993d1450b
--------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> Co-authored-by: terrancedejesus <terrance.dejesus@elastic.co> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> Co-authored-by: eric-forte-elastic <eric.forte@elastic.co>
91 lines
2.6 KiB
TOML
91 lines
2.6 KiB
TOML
[metadata]
|
|
creation_date = "2020/10/28"
|
|
integration = ["endpoint", "windows", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
|
|
maturity = "production"
|
|
updated_date = "2026/03/24"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies the creation, change, or deletion of a DLL module within a Windows SxS local folder. Adversaries may abuse
|
|
shared modules to execute malicious payloads by instructing the Windows module loader to load DLLs from arbitrary local
|
|
paths.
|
|
"""
|
|
from = "now-9m"
|
|
index = [
|
|
"winlogbeat-*",
|
|
"logs-endpoint.events.file-*",
|
|
"logs-windows.sysmon_operational-*",
|
|
"endgame-*",
|
|
"logs-m365_defender.event-*",
|
|
"logs-sentinel_one_cloud_funnel.*",
|
|
"logs-crowdstrike.fdr*",
|
|
]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Execution via local SxS Shared Module"
|
|
note = """## Triage and analysis
|
|
|
|
The SxS DotLocal folder is a legitimate feature that can be abused to hijack standard modules loading order by forcing an executable on the same application.exe.local folder to load a malicious DLL module from the same directory.
|
|
"""
|
|
references = ["https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-redirection"]
|
|
risk_score = 47
|
|
rule_id = "a3ea12f3-0d4e-4667-8b44-4230c63f3c75"
|
|
severity = "medium"
|
|
tags = [
|
|
"Domain: Endpoint",
|
|
"OS: Windows",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Execution",
|
|
"Data Source: Elastic Endgame",
|
|
"Data Source: Elastic Defend",
|
|
"Data Source: Sysmon",
|
|
"Data Source: Microsoft Defender for Endpoint",
|
|
"Data Source: SentinelOne",
|
|
"Data Source: Crowdstrike",
|
|
"Resources: Investigation Guide",
|
|
]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
file where host.os.type == "windows" and file.extension : "dll" and
|
|
file.path : (
|
|
"C:\\*\\*.exe.local\\*.dll",
|
|
/* Crowdstrike specific condition as it uses NT Object paths */
|
|
"\\Device\\HarddiskVolume*\\*\\*.exe.local\\*.dll"
|
|
)
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1129"
|
|
name = "Shared Modules"
|
|
reference = "https://attack.mitre.org/techniques/T1129/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0002"
|
|
name = "Execution"
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1574"
|
|
name = "Hijack Execution Flow"
|
|
reference = "https://attack.mitre.org/techniques/T1574/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1574.001"
|
|
name = "DLL"
|
|
reference = "https://attack.mitre.org/techniques/T1574/001/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|