Suspicious Chrome Launch with Remote Debugging for Credential Theft

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 a Chromium-based browser launched with a remote debugging port or pipe argument, a technique used by EddieStealer and similar infostealers to drive the browser over the DevTools protocol and extract saved passwords and cookies. Remote debugging flags are rarely set by end users and indicate automated browser credential theft.

Reporting behind it

Related detections9 linkedT1555.003 — drag to rearrange

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Suspicious Named Pipe ChromeDecryptIPC Used by Stealer (via pipe_created)

Suspicious Clipboard Data Access via Get-Clipboard (BeaverTail OtterCookie)

Malicious Edge Credential Parser Execution via PowerShell (via process_creation)

SapphireStealer Working Directory File Drop in Temp

Malicious RemusStealer Credential Exfiltration to pics TLD C2

Suspicious Local Password Validation via dscl authonly

Suspicious Chrome Launch with Remote Debugging for Credential 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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