Suspicious 1Phish Kit Cookies and Telemetry Beacon

ATT&CK techniques

Initial Access → Cred Access

Recon
Resource Dev
Initial Access
- T1566.002Spearphishing Link
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1539Steal Web Session Cookie
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the 1Phish kit fingerprint cookies validated_user_1pass and hideclick ignore alongside its base64 clid telemetry parameter. These constants are set by the phishing kit to track victim progress and evade automated crawlers. Requests carrying these kit-specific cookies or the clid telemetry marker identify pages served by the 1Phish infrastructure.

Reporting behind it

Related detections9 linkedT1539 — drag to rearrange

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Suspicious NFe-Themed Brazilian Lure Executable Execution

Malicious RemusStealer Credential Exfiltration to pics TLD C2

Possible Citrix Bleed Session Token Leak via OpenID Configuration Endpoint (CVE-2023-4966) (via webserver)

Uncommon Browser Launched with Remote Debugging Port for Cookie Theft (via process_creation)

Suspicious 1Phish Kit Cookies and Telemetry Beacon

Pivot detection · T1539 · 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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