Suspicious Tycoon 2FA Credential Exfiltration Fields

ATT&CK techniques

Cred Access → Collection

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

What it detects

This rule detects HTTP requests carrying the Tycoon 2FA exfiltration parameters bltdip, bltdref, bltdua and bltddata. These custom field names package the stolen victim context and session data sent back to the phishing kit, uniquely marking AiTM credential theft.

Reporting behind it

Related detections9 linkedT1557 — drag to rearrange

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Suspicious Tycoon 2FA Credential Exfiltration Fields

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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