Mika Ayenson
80 lines
2.6 KiB
TOML
80 lines
2.6 KiB
TOML
[metadata]
|
|
creation_date = "2021/02/23"
|
|
maturity = "production"
|
|
updated_date = "2022/07/21"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies when the built in macOS Installer program generates a network event after attempting to install a .pkg file.
|
|
This activity has been observed being leveraged by malware.
|
|
"""
|
|
false_positives = [
|
|
"""
|
|
Custom organization-specific macOS packages that use .pkg files to run cURL could trigger this rule. If known
|
|
behavior is causing false positives, it can be excluded from the rule.
|
|
""",
|
|
]
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "macOS Installer Spawns Network Event"
|
|
references = [
|
|
"https://redcanary.com/blog/clipping-silver-sparrows-wings",
|
|
"https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml",
|
|
]
|
|
risk_score = 47
|
|
rule_id = "99239e7d-b0d4-46e3-8609-acafcf99f68c"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "macOS", "Threat Detection", "Execution", "Command and Control"]
|
|
type = "eql"
|
|
|
|
query = '''
|
|
sequence by process.entity_id with maxspan=1m
|
|
[process where event.type == "start" and host.os.family == "macos" and
|
|
process.parent.executable in ("/usr/sbin/installer", "/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer") ]
|
|
[network where not cidrmatch(destination.ip,
|
|
"10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29", "192.0.0.8/32",
|
|
"192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24", "192.31.196.0/24",
|
|
"192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10", "192.175.48.0/24",
|
|
"198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10", "FF00::/8")]
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1059"
|
|
name = "Command and Scripting Interpreter"
|
|
reference = "https://attack.mitre.org/techniques/T1059/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1059.007"
|
|
name = "JavaScript"
|
|
reference = "https://attack.mitre.org/techniques/T1059/007/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0002"
|
|
name = "Execution"
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1071"
|
|
name = "Application Layer Protocol"
|
|
reference = "https://attack.mitre.org/techniques/T1071/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1071.001"
|
|
name = "Web Protocols"
|
|
reference = "https://attack.mitre.org/techniques/T1071/001/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0011"
|
|
name = "Command and Control"
|
|
reference = "https://attack.mitre.org/tactics/TA0011/"
|
|
|