Potential Cookies Theft via Browser Debugging
Elastic Stack Serverless Security
Identifies the execution of a Chromium based browser with the debugging process argument, which may indicate an attempt to steal authentication cookies. An adversary may steal web application or service session cookies and use them to gain access web applications or Internet services as an authenticated user without needing credentials.
Rule type: eql
Rule indices:
- auditbeat-*
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 33
References:
- https://github.com/defaultnamehere/cookie_crimes
- https://embracethered.com/blog/posts/2020/cookie-crimes-on-mirosoft-edge/
- https://github.com/rapid7/metasploit-framework/blob/master/documentation/modules/post/multi/gather/chrome_cookies.md
- https://posts.specterops.io/hands-in-the-cookie-jar-dumping-cookies-with-chromiums-remote-debugger-port-34c4f468844e
Tags:
- Elastic
- Host
- Linux
- Windows
- macOS
- Threat Detection
- Credential Access
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
process where event.type in ("start", "process_started", "info") and
process.name in (
"Microsoft Edge",
"chrome.exe",
"Google Chrome",
"google-chrome-stable",
"google-chrome-beta",
"google-chrome",
"msedge.exe") and
process.args : ("--remote-debugging-port=*",
"--remote-debugging-targets=*",
"--remote-debugging-pipe=*") and
process.args : "--user-data-dir=*" and not process.args:"--remote-debugging-port=0"
Framework: MITRE ATT&CKTM
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/