Potential Cookies Theft via Browser Debuggingedit
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 (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:
- Domain: Endpoint
- OS: Linux
- OS: Windows
- OS: macOS
- Use Case: Threat Detection
- Tactic: Credential Access
- Data Source: Elastic Defend
Version: 105
Rule authors:
- Elastic
Rule license: Elastic License v2
Setupedit
Setup
If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
events will not define event.ingested and default fallback for EQL rules was not added until version 8.2.
Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
event.ingested to @timestamp.
For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
Rule queryedit
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/