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

Suspicious Entra Sign-In to OfficeHome with axios User Agent

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Suspicious IAM Persistence and Privilege Escalation Actions

Suspicious AWS STS AssumeRoot Privilege Escalation To Member Account Root

Suspicious AWS Console Phishing MFA Relay Endpoints

Suspicious AWS AiTM Phishing Kit Endpoint Access via Proxy

Suspicious 1Phish Kit Cookies and Telemetry Beacon

Possible AiTM Phishing Sign-On Evaluation Denied by Okta FastPass

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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