Malicious Tycoon 2FA AiTM Phishing WebSocket Channel

ATT&CK techniques

Cred Access → Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1111Multi-Factor Authentication Interception
- T1557Adversary-in-the-Middle
Discovery
Lateral Movement
Collection
- T1557Adversary-in-the-Middle
C2
Exfiltration
Impact

What it detects

This rule detects the Tycoon 2FA phishing kit opening its adversary-in-the-middle relay over the fixed /web6socket/socket.io WebSocket endpoint. This path is unique to the kit and identifies a victim connecting to the AiTM proxy used to steal session cookies.

Reporting behind it

Related detections9 linkedT1557 — drag to rearrange

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Malicious Evilginx AiTM Phishing Proxy Default TLS Certificate

Suspicious AiTM Phishing Kit Session Validation Endpoint via Proxy

Suspicious Firefox Enterprise Root Certificate Trust Enabled

Malicious Root Certificate Installed via certutil addstore for AiTM Interception

Suspicious Code of Conduct Phishing Email From cocinternal.com Sender (via m365)

Suspicious Entra Sign-In With Axios Automation User-Agent via AiTM Token Replay (via azure)

Suspicious OfficeHome Sign-In With Axios User Agent via Tycoon 2FA Proxy

Suspicious AWS AiTM Phishing Kit Endpoint Access via Proxy

Malicious Tycoon 2FA AiTM Phishing WebSocket Channel

Pivot detection · T1557 · 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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