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

Suspicious AiTM Phishing Kit Session Validation Endpoint via Proxy

Suspicious Sneaky 2FA Phishing Kit License Check via API Key Endpoint (via proxy)

Malicious TCP Session Hijacking via rshijack

Suspicious Entra ID Auth Broker Sign-In With Node.js User Agent via Tycoon 2FA

Malicious EdgeStepper iptables DNS Redirection for Adversary-in-the-Middle

Suspicious Tycoon 2FA Credential Exfiltration Fields

Suspicious Entra Sign-In to OfficeHome with axios User Agent

Suspicious Entra Sign-In Interrupt With High Aggregated Risk via AiTM DNS Hijacking (via azure)

Possible Adversary-in-the-Middle Proxy Login via Crafted URL Parameters

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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