Suspicious Child Process of Adobe Acrobat Reader Update Service

 1[metadata]
 2creation_date = "2021/01/19"
 3integration = ["endpoint"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Detects attempts to exploit privilege escalation vulnerabilities related to the Adobe Acrobat Reader
11PrivilegedHelperTool responsible for installing updates. For more information, refer to CVE-2020-9615, CVE-2020-9614 and
12CVE-2020-9613 and verify that the impacted system is patched.
13"""
14false_positives = ["Trusted system or Adobe Acrobat Related processes."]
15from = "now-9m"
16index = ["logs-endpoint.events.*"]
17language = "kuery"
18license = "Elastic License v2"
19name = "Suspicious Child Process of Adobe Acrobat Reader Update Service"
20references = [
21    "https://rekken.github.io/2020/05/14/Security-Flaws-in-Adobe-Acrobat-Reader-Allow-Malicious-Program-to-Gain-Root-on-macOS-Silently/",
22]
23risk_score = 73
24rule_id = "f85ce03f-d8a8-4c83-acdc-5c8cd0592be7"
25setup = """## Setup
26
27This rule requires data coming in from Elastic Defend.
28
29### Elastic Defend Integration Setup
30Elastic 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.
31
32#### Prerequisite Requirements:
33- Fleet is required for Elastic Defend.
34- To configure Fleet Server refer to the [documentation](https://www.elastic.co/guide/en/fleet/current/fleet-server.html).
35
36#### The following steps should be executed in order to add the Elastic Defend integration on a macOS System:
37- Go to the Kibana home page and click "Add integrations".
38- In the query bar, search for "Elastic Defend" and select the integration to see more details about it.
39- Click "Add Elastic Defend".
40- Configure the integration name and optionally add a description.
41- Select the type of environment you want to protect, for MacOS it is recommended to select "Traditional Endpoints".
42- 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).
43- We suggest selecting "Complete EDR (Endpoint Detection and Response)" as a configuration setting, that provides "All events; all preventions"
44- 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.
45For more details on Elastic Agent configuration settings, refer to the [helper guide](https://www.elastic.co/guide/en/fleet/current/agent-policy.html).
46- Click "Save and Continue".
47- 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.
48For more details on Elastic Defend refer to the [helper guide](https://www.elastic.co/guide/en/security/current/install-endpoint.html).
49"""
50severity = "high"
51tags = [
52    "Domain: Endpoint",
53    "OS: macOS",
54    "Use Case: Threat Detection",
55    "Tactic: Privilege Escalation",
56    "Use Case: Vulnerability",
57    "Data Source: Elastic Defend",
58]
59timestamp_override = "event.ingested"
60type = "query"
61
62query = '''
63event.category:process and host.os.type:macos and event.type:(start or process_started) and
64  process.parent.name:com.adobe.ARMDC.SMJobBlessHelper and
65  user.name:root and
66  not process.executable: (/Library/PrivilegedHelperTools/com.adobe.ARMDC.SMJobBlessHelper or
67                           /usr/bin/codesign or
68                           /private/var/folders/zz/*/T/download/ARMDCHammer or
69                           /usr/sbin/pkgutil or
70                           /usr/bin/shasum or
71                           /usr/bin/perl* or
72                           /usr/sbin/spctl or
73                           /usr/sbin/installer or
74                           /usr/bin/csrutil)
75'''
76
77
78[[rule.threat]]
79framework = "MITRE ATT&CK"
80[[rule.threat.technique]]
81id = "T1068"
82name = "Exploitation for Privilege Escalation"
83reference = "https://attack.mitre.org/techniques/T1068/"
84
85
86[rule.threat.tactic]
87id = "TA0004"
88name = "Privilege Escalation"
89reference = "https://attack.mitre.org/tactics/TA0004/"