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Access to Keychain Credentials Directories

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Access to Keychain Credentials Directories

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Adversaries may collect the keychain storage data from a system to acquire credentials. Keychains are the built-in way for macOS to keep track of users' passwords and credentials for many services and features such as WiFi passwords, websites, secure notes and certificates.

Rule type: eql

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:

Tags:

Elastic
Host
macOS
Threat Detection
Credential Access

Version: 100 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where event.type in ("start", "process_started") and
process.args : ( "/Users/*/Library/Keychains/*",
"/Library/Keychains/*", "/Network/Library/Keychains/*",
"System.keychain", "login.keychain-db", "login.keychain"
) and not process.args : ("find-certificate",
"add-trusted-cert", "set-keychain-settings",
"delete-certificate",
"/Users/*/Library/Keychains/openvpn.keychain-db",
"show-keychain-info", "lock-keychain",
"set-key-partition-list", "import",
"find-identity") and not process.parent.executable : (
"/Applications/OpenVPN Connect/OpenVPN
Connect.app/Contents/MacOS/OpenVPN Connect",
"/Applications/Microsoft Defender.app/Contents/MacOS/wdavdaemon_enterp
rise.app/Contents/MacOS/wdavdaemon_enterprise",
"/opt/jc/bin/jumpcloud-agent" ) and not process.executable :
"/opt/jc/bin/jumpcloud-agent"

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Credentials from Password Stores
- ID: T1555
- Reference URL: https://attack.mitre.org/techniques/T1555/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 8 (8.4.0 release)

Updated query, changed from:

process where event.type in ("start", "process_started") and
process.args : ( "/Users/*/Library/Keychains/*",
"/Library/Keychains/*", "/Network/Library/Keychains/*",
"System.keychain", "login.keychain-db", "login.keychain"
) and not process.args : ("find-certificate",
"add-trusted-cert", "set-keychain-settings",
"delete-certificate",
"/Users/*/Library/Keychains/openvpn.keychain-db",
"show-keychain-info", "lock-keychain",
"set-key-partition-list", "import",
"find-identity") and not process.parent.executable :
"/Applications/OpenVPN Connect/OpenVPN
Connect.app/Contents/MacOS/OpenVPN Connect"

Version 6 (8.2.0 release)

Formatting only

Version 5 (7.13.0 release)

Updated query, changed from:

process where event.type in ("start", "process_started") and
process.args : ( "/Users/*/Library/Keychains/*",
"/Library/Keychains/*", "/Network/Library/Keychains/*",
"System.keychain", "login.keychain-db", "login.keychain"
)

Version 4 (7.12.0 release)

Rule name changed from: Compression of Keychain Credentials Directories

Updated query, changed from:

event.category:process and event.type:(start or process_started) and
process.name:(zip or tar or gzip or 7za or hdiutil) and
process.args:("/Library/Keychains/" or "/Network/Library/Keychains/"
or "~/Library/Keychains/")

Version 3 (7.11.2 release)

Formatting only

Version 2 (7.11.0 release)

Formatting only

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