Possible Mamba 2FA AiTM Phishing URL Pattern

ATT&CK techniques

Initial Access → Collection

Recon
Resource Dev
Initial Access
- T1566.001Spearphishing Attachment
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 matching the Mamba 2FA adversary in the middle phishing URL structure of a single letter path segment m, n or o followed by a query string carrying a Base64 encoded victim token. Mamba 2FA relays Microsoft 365 credentials and session cookies through this pattern to bypass multifactor authentication. Because the pattern is broad it should be corroborated with the known relay domains before action.

Reporting behind it

Related detections9 linkedT1557 — drag to rearrange

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

Suspicious Office Application Spawning Script Interpreter

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

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

Malicious Equation Editor Child Process Indicating Exploit

Possible Mamba 2FA AiTM Phishing URL Pattern

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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