Suspicious Tycoon Phishing-as-a-Service Credential Exfiltration Path (via proxy)

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 HTTP POST requests to the /web6/info endpoint used by the Tycoon Phishing-as-a-Service platform to exfiltrate harvested credentials, cookies and MFA tokens from voicemail-themed phishing pages. The /web6/ path structure is served alongside XOR-obfuscated JavaScript and a Cloudflare Turnstile evasion prompt. This adversary-in-the-middle flow enables session and 2FA bypass.

Reporting behind it

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

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Suspicious Tycoon Phishing-as-a-Service Credential Exfiltration Path (via proxy)

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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