Suspicious Chromium Browser Launch with Remote Debugging Port for Cookie Theft (via process_creation)

ATT&CK techniques

Cred Access

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

What it detects

This rule detects chrome.exe or msedge.exe launched with a remote debugging port together with a profile directory argument, the app-bound encryption bypass Red Canary observed across Stealc, Vidar, Cryptbot, Remcos, and Lumma stealers. Attackers drive a headless debugging session to read decrypted cookies from a live browser profile, so this argument combination indicates credential and session theft.

Reporting behind it

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Suspicious Chromium Browser Launch with Remote Debugging Port for Cookie Theft (via process_creation)

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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