IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Access of Stored Browser Credentials

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Access of Stored Browser Credentials

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Identifies the execution of a process with arguments pointing to known browser files that store passwords and cookies. Adversaries may acquire credentials from web browsers by reading files specific to the target browser.

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:

https://securelist.com/calisto-trojan-for-macos/86543/

Tags:

Elastic
Host
macOS
Threat Detection
Credential Access

Version: 4 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 8.4.0

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/Application
Support/Google/Chrome/Default/Login Data",
"/Users/*/Library/Application Support/Google/Chrome/Default/Cookies",
"/Users/*/Library/Application Support/Google/Chrome/Profile*/Cookies",
"/Users/*/Library/Cookies*", "/Users/*/Library/Application
Support/Firefox/Profiles/*.default/cookies.sqlite",
"/Users/*/Library/Application
Support/Firefox/Profiles/*.default/key*.db",
"/Users/*/Library/Application
Support/Firefox/Profiles/*.default/logins.json", "Login Data",
"Cookies.binarycookies", "key4.db", "key3.db",
"logins.json", "cookies.sqlite" )

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: Steal Web Session Cookie
- ID: T1539
- Reference URL: https://attack.mitre.org/techniques/T1539/

Rule version history

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Version 4 (8.4.0 release)

Updated query, changed from:

process where event.type in ("start", "process_started") and
process.args : ( "/Users/*/Library/Application
Support/Google/Chrome/Default/Login Data",
"/Users/*/Library/Application Support/Google/Chrome/Default/Cookies",
"/Users/*/Library/Cookies*", "/Users/*/Library/Application
Support/Firefox/Profiles/*.default/cookies.sqlite",
"/Users/*/Library/Application
Support/Firefox/Profiles/*.default/key*.db",
"/Users/*/Library/Application
Support/Firefox/Profiles/*.default/logins.json", "Login Data",
"Cookies.binarycookies", "key4.db", "key3.db",
"logins.json", "cookies.sqlite" )

Version 2 (8.2.0 release)

Formatting only

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