Suspicious Child Process of Adobe Acrobat Reader Update Service

 1[metadata]
 2creation_date = "2021/01/19"
 3integration = ["endpoint"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2023/11/15"
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Detects attempts to exploit privilege escalation vulnerabilities related to the Adobe Acrobat Reader
13PrivilegedHelperTool responsible for installing updates. For more information, refer to CVE-2020-9615, CVE-2020-9614 and
14CVE-2020-9613 and verify that the impacted system is patched.
15"""
16false_positives = ["Trusted system or Adobe Acrobat Related processes."]
17from = "now-9m"
18index = ["logs-endpoint.events.*"]
19language = "kuery"
20license = "Elastic License v2"
21name = "Suspicious Child Process of Adobe Acrobat Reader Update Service"
22references = [
23    "https://rekken.github.io/2020/05/14/Security-Flaws-in-Adobe-Acrobat-Reader-Allow-Malicious-Program-to-Gain-Root-on-macOS-Silently/",
24]
25risk_score = 73
26rule_id = "f85ce03f-d8a8-4c83-acdc-5c8cd0592be7"
27setup = """## Setup
28
29This rule requires data coming in from Elastic Defend.
30
31### Elastic Defend Integration Setup
32Elastic Defend is integrated into the Elastic Agent using Fleet. Upon configuration, the integration allows the Elastic Agent to monitor events on your host and send data to the Elastic Security app.
33
34#### Prerequisite Requirements:
35- Fleet is required for Elastic Defend.
36- To configure Fleet Server refer to the [documentation](https://www.elastic.co/guide/en/fleet/current/fleet-server.html).
37
38#### The following steps should be executed in order to add the Elastic Defend integration on a macOS System:
39- Go to the Kibana home page and click "Add integrations".
40- In the query bar, search for "Elastic Defend" and select the integration to see more details about it.
41- Click "Add Elastic Defend".
42- Configure the integration name and optionally add a description.
43- Select the type of environment you want to protect, for MacOS it is recommended to select "Traditional Endpoints".
44- Select a configuration preset. Each preset comes with different default settings for Elastic Agent, you can further customize these later by configuring the Elastic Defend integration policy. [Helper guide](https://www.elastic.co/guide/en/security/current/configure-endpoint-integration-policy.html).
45- We suggest selecting "Complete EDR (Endpoint Detection and Response)" as a configuration setting, that provides "All events; all preventions"
46- Enter a name for the agent policy in "New agent policy name". If other agent policies already exist, you can click the "Existing hosts" tab and select an existing policy instead.
47For more details on Elastic Agent configuration settings, refer to the [helper guide](https://www.elastic.co/guide/en/fleet/current/agent-policy.html).
48- Click "Save and Continue".
49- To complete the integration, select "Add Elastic Agent to your hosts" and continue to the next section to install the Elastic Agent on your hosts.
50For more details on Elastic Defend refer to the [helper guide](https://www.elastic.co/guide/en/security/current/install-endpoint.html).
51"""
52severity = "high"
53tags = [
54    "Domain: Endpoint",
55    "OS: macOS",
56    "Use Case: Threat Detection",
57    "Tactic: Privilege Escalation",
58    "Use Case: Vulnerability",
59    "Data Source: Elastic Defend"
60]
61timestamp_override = "event.ingested"
62type = "query"
63
64query = '''
65event.category:process and host.os.type:macos and event.type:(start or process_started) and
66  process.parent.name:com.adobe.ARMDC.SMJobBlessHelper and
67  user.name:root and
68  not process.executable: (/Library/PrivilegedHelperTools/com.adobe.ARMDC.SMJobBlessHelper or
69                           /usr/bin/codesign or
70                           /private/var/folders/zz/*/T/download/ARMDCHammer or
71                           /usr/sbin/pkgutil or
72                           /usr/bin/shasum or
73                           /usr/bin/perl* or
74                           /usr/sbin/spctl or
75                           /usr/sbin/installer or
76                           /usr/bin/csrutil)
77'''
78
79
80[[rule.threat]]
81framework = "MITRE ATT&CK"
82[[rule.threat.technique]]
83id = "T1068"
84name = "Exploitation for Privilege Escalation"
85reference = "https://attack.mitre.org/techniques/T1068/"
86
87
88[rule.threat.tactic]
89id = "TA0004"
90name = "Privilege Escalation"
91reference = "https://attack.mitre.org/tactics/TA0004/"