Access of Stored Browser Credentials

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: 1

Added (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

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/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: Credentials from Password Stores
- ID: T1555
- Reference URL: https://attack.mitre.org/techniques/T1555/

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