Suspicious Chrome Launched With Remote Debugging Port For Cookie Theft

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1539Steal Web Session Cookie
- T1555.003Credentials from Web Browsers
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects chrome.exe started with a remote debugging port argument which MaaS infostealers use to attach over the DevTools protocol and read decrypted cookies and session tokens after Chrome application-bound encryption defenses. Adversaries drive a debug-enabled browser instance to harvest authenticated session material without triggering the standard credential prompts.

Reporting behind it

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Suspicious Named Pipe ChromeDecryptIPC Used by Stealer (via pipe_created)

Suspicious Chrome Launched With Remote Debugging Port For Cookie Theft

Pivot detection · T1555.003 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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