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

ATT&CK techniques

Initial Access → Collection

Recon
Resource Dev
Initial Access
- T1078.004Cloud Accounts
Execution
Persistence
- T1078.004Cloud Accounts
Priv Esc
- T1078.004Cloud Accounts
Defense Evasion
- T1078.004Cloud Accounts
Cred Access
- T1539Steal Web Session Cookie
- T1557Adversary-in-the-Middle
Discovery
Lateral Movement
Collection
- T1557Adversary-in-the-Middle
C2
Exfiltration
Impact

What it detects

This rule detects a successful Entra sign-in to the OfficeHome application originating from an axios HTTP client user agent. This pattern is characteristic of the Tycoon 2FA adversary-in-the-middle platform replaying stolen session tokens through automated proxy infrastructure rather than a real browser. A scripted axios agent authenticating interactively indicates session hijacking following a phishing capture.

Reporting behind it

Related detections9 linkedT1078.004 — drag to rearrange

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

Pivot detection · T1078.004 · 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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