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Suspicious Child Process of Adobe Acrobat Reader Update Service

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Suspicious Child Process of Adobe Acrobat Reader Update Service

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Detects attempts to exploit privilege escalation vulnerabilities related to the Adobe Acrobat Reader PrivilegedHelperTool responsible for installing updates. For more information, refer to CVE-2020-9615, CVE-2020-9614 and CVE-2020-9613 and verify that the impacted system is patched.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://rekken.github.io/2020/05/14/Security-Flaws-in-Adobe-Acrobat-Reader-Allow-Malicious-Program-to-Gain-Root-on-macOS-Silently/

Tags:

Elastic
Host
macOS
Threat Detection
Privilege Escalation
CVE-2020-9615
CVE-2020-9614
CVE-2020-9613

Version: 100 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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Trusted system or Adobe Acrobat Related processes.

Rule query

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event.category:process and event.type:(start or process_started) and
process.parent.name:com.adobe.ARMDC.SMJobBlessHelper and
user.name:root and not process.executable:
(/Library/PrivilegedHelperTools/com.adobe.ARMDC.SMJobBlessHelper or
/usr/bin/codesign or
/private/var/folders/zz/*/T/download/ARMDCHammer or
/usr/sbin/pkgutil or /usr/bin/shasum or
/usr/bin/perl* or /usr/sbin/spctl or
/usr/sbin/installer or /usr/bin/csrutil)

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/

Rule version history

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Version 100 (8.5.0 release)

Updated query, changed from:

event.category:process and event.type:(start or process_started) and
process.parent.name:com.adobe.ARMDC.SMJobBlessHelper and
user.name:root and not process.executable:
(/Library/PrivilegedHelperTools/com.adobe.ARMDC.SMJobBlessHelper or
/usr/bin/codesign or
/private/var/folders/zz/*/T/download/ARMDCHammer or
/usr/sbin/pkgutil or /usr/bin/shasum or
/usr/bin/perl* or /usr/sbin/spctl or
/usr/sbin/installer)

Version 2 (8.4.0 release)

Formatting only

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