shashank-elastic
e8c54169a4
* Prep for Release 9.1 * Update Patch Version * Update Patch version * Update Patch version
89 lines
3.2 KiB
TOML
89 lines
3.2 KiB
TOML
[metadata]
|
|
creation_date = "2023/09/26"
|
|
integration = ["endpoint", "windows"]
|
|
maturity = "production"
|
|
updated_date = "2025/03/20"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
building_block_type = "default"
|
|
description = """
|
|
Identifies suspicious execution of the built-in Windows Installer, msiexec.exe, to install a package from usual paths or
|
|
parent process. Adversaries may abuse msiexec.exe to launch malicious local MSI files.
|
|
"""
|
|
from = "now-119m"
|
|
index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.*", "endgame-*"]
|
|
interval = "60m"
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Suspicious Execution via MSIEXEC"
|
|
references = [
|
|
"https://lolbas-project.github.io/lolbas/Binaries/Msiexec/",
|
|
"https://www.guardicore.com/labs/purple-fox-rootkit-now-propagates-as-a-worm/",
|
|
]
|
|
risk_score = 21
|
|
rule_id = "708c9d92-22a3-4fe0-b6b9-1f861c55502d"
|
|
severity = "low"
|
|
tags = [
|
|
"Domain: Endpoint",
|
|
"OS: Windows",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Defense Evasion",
|
|
"Rule Type: BBR",
|
|
"Data Source: Elastic Defend",
|
|
"Data Source: Elastic Endgame",
|
|
]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
process where host.os.type == "windows" and event.action == "start" and
|
|
process.name : "msiexec.exe" and user.id : ("S-1-5-21*", "S-1-12-*") and process.parent.executable != null and
|
|
(
|
|
(process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
|
|
process.args : ("?:\\Users\\*", "?:\\ProgramData\\*") and
|
|
not process.parent.executable : ("?:\\Program Files (x86)\\*.exe",
|
|
"?:\\Program Files\\*.exe",
|
|
"?:\\Windows\\explorer.exe",
|
|
"?:\\Users\\*\\Desktop\\*",
|
|
"?:\\Users\\*\\Downloads\\*",
|
|
"?:\\programdata\\*")) or
|
|
|
|
(process.args_count == 1 and not process.parent.executable : ("?:\\Windows\\explorer.exe", "?:\\Windows\\SysWOW64\\explorer.exe")) or
|
|
|
|
(process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
|
|
(process.parent.args : "Schedule" or process.parent.name : "wmiprvse.exe" or
|
|
process.parent.executable : "?:\\Users\\*\\AppData\\*" or
|
|
(process.parent.name : ("powershell.exe", "cmd.exe") and length(process.parent.command_line) >= 200))) or
|
|
|
|
(process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
|
|
?process.working_directory : "?:\\" and process.parent.name : ("cmd.exe", "powershell.exe"))
|
|
) and
|
|
|
|
/* noisy pattern */
|
|
not (process.parent.executable : "?:\\Users\\*\\AppData\\Local\\Temp\\*" and ?process.parent.args_count >= 2 and
|
|
process.args : "?:\\Users\\*\\AppData\\Local\\Temp\\*\\*.msi") and
|
|
|
|
not process.args : ("?:\\Program Files (x86)\\*", "?:\\Program Files\\*")
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1218"
|
|
name = "System Binary Proxy Execution"
|
|
reference = "https://attack.mitre.org/techniques/T1218/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1218.007"
|
|
name = "Msiexec"
|
|
reference = "https://attack.mitre.org/techniques/T1218/007/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
|