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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: 5m

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:

Domain: Endpoint
OS: macOS
Use Case: Threat Detection
Tactic: Credential Access
Data Source: Elastic Defend

Version: 105

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "macos" and 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"
    ) and
  not (process.name : "wordexp-helper" and process.parent.name : ("elastic-agent", "elastic-endpoint"))

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/
Technique:
- Name: Credentials from Password Stores
- ID: T1555
- Reference URL: https://attack.mitre.org/techniques/T1555/
Sub-technique:
- Name: Credentials from Web Browsers
- ID: T1555.003
- Reference URL: https://attack.mitre.org/techniques/T1555/003/

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