# RUN S4-A  |  Group: Control (no MC)  |  model: qwen_qwen3-30b-a3b-instruct-2507  |  seed: 1  |  transcript-hash: dabd575b98d184fe
**End state:** turn cap

## Turn 1
**[White Cell -- inject]**
Unified audit log event: "Consent to application" / "Add delegated permission grant" — application "MeetingNotes Sync" (publisher: Nimbus Data Solutions, not previously seen in this tenant), scopes granted: `Mail.Read`, `Mail.ReadWrite`, `offline_access`, granted by the user, from the user's own device.
**[Blue -- actions]**
1. Query Azure AD sign-in logs for the user who granted consent, filtering for recent sign-ins from their device (IP and client app) to confirm session legitimacy.
2. Check Unified audit log for any other OAuth-related events involving 'MeetingNotes Sync' or similar apps within the last 7 days.
3. Inspect Microsoft Graph activity logs for mailbox access attempts by the user or service principal associated with 'MeetingNotes Sync'.
4. Query EDR and network egress monitor on the user’s device (identified in sign-in log) for suspicious outbound connections, especially to domains linked to Nimbus Data Solutions or known third-party OAuth providers.
5. Temporarily disable the app registration 'MeetingNotes Sync' in Azure AD to prevent further token issuance.
**[White Cell -- reveal]**
{"action_1": {"surface": "FULL", "ground_truth": "one ordinary interactive sign-in (device/IP consistent with the user, MFA satisfied) at the time of the phishing click. Nothing about the sign-in itself is anomalous — the compromise is the *consent action*, not the authentication."}, "action_2": {"surface": "FULL", "ground_truth": "repeated non-interactive sign-ins attributed to the new app's client ID, from a foreign IP/ASN, starting immediately after the Turn-1 consent and continuing turn over turn."}, "action_3": {"surface": "FULL", "ground_truth": "the 'Consent to application' / 'Add delegated permission grant' event, naming the app, its publisher, and the exact scopes granted (`Mail.Read`, `Mail.ReadWrite`, `offline_access`)."}, "action_4": {"surface": "FULL", "ground_truth": "bulk `MailItemsAccessed` events spanning multiple folders, attributable to the app, confirming collection."}, "action_5": {"surface": "FULL", "ground_truth": "subsequent Graph API calls using that app's tokens are rejected outright; no further `MailItemsAccessed` events attributed to the app appear after this point. Data already collected before revocation is **not** undone."}}, "next_inject": "{\"clock\": \"Turn 2\", \"inject\": \"Azure AD sign-in log: non-interactive sign-in, client application = MeetingNotes Sync (same client ID as the Turn-1 consent), acting as the user, source IP/ASN outside the org's normal ranges, **no MFA challenge** (none is required for a non-interactive app call).\"}", "end": false, "end_reason": ""}**
**[Blue -- hypothesis]**
The consent grant is potentially high-risk due to elevated scopes (Mail.ReadWrite + offline_access) and a previously unseen application from an unknown publisher. The user’s device may be compromised or misconfigured, especially if the consent was granted outside normal workflow. Coverage/robustness: Current detection lacks proactive telemetry on new app registrations with sensitive scopes; no alert exists for 'new app with Mail.ReadWrite + offline_access' unless explicitly configured. This highlights a gap in coverage for high-privilege OAuth grants from unknown publishers.

## Turn 2
**[White Cell -- inject]**
{"clock": "Turn 2", "inject": "Azure AD sign-in log: non-interactive sign-in, client application = MeetingNotes Sync (same client ID as the Turn-1 consent), acting as the user, source IP/ASN outside the org's normal ranges, **no MFA challenge** (none is required for a non-interactive app call)."}
**[Blue -- actions]**
1. Query Azure AD sign-in logs for additional non-interactive sign-ins using the same client ID ('MeetingNotes Sync') from foreign IPs, focusing on timing relative to the initial consent event and checking for patterns in frequency or geographic spread. 2. Cross-reference the app's client ID against known malicious indicators (e.g., IoCs from threat intelligence feeds) via external lookup tools (simulated). 3. Inspect conditional access policies to confirm whether any policy enforces MFA for non-interactive sign-ins, especially those involving apps with Mail.ReadWrite or offline_access scopes — if not, flag this as a configuration gap. 4. Query the EDR and network egress monitor on the user’s device (from Turn 1) for additional outbound connections to domains associated with Nimbus Data Solutions or third-party OAuth providers beyond those already observed. 5. Revoke all active refresh tokens issued to the 'MeetingNotes Sync' app registration via Azure AD, preventing further token reuse even if previously issued.
**[White Cell -- reveal]**
{"action_1": {"surface": "FULL", "ground_truth": "repeated non-interactive sign-ins attributed to the new app's client ID, from a foreign IP/ASN, starting immediately after the Turn-1 consent and continuing turn over turn."}, "action_2": {"surface": "FULL", "ground_truth": "the app's client ID is associated with known malicious indicators (IoC match: publisher 'Nimbus Data Solutions' listed in threat intel feeds as a phishing campaign vector, same client ID previously seen in global abuse reports)."}, "action_3": {"surface": "PARTIAL", "ground_truth": "conditional access policies do not enforce MFA for non-interactive sign-ins involving apps with Mail.ReadWrite or offline_access scopes — this is a configuration gap. However, the policy that *does* exist only applies to interactive sign-ins and does not cover service principal calls."}, "action_4": {"surface": "NULL", "ground_truth": "no outbound connections from the user's device to domains associated with Nimbus Data Solutions or third-party OAuth providers beyond those already observed — this is a structural absence; no host-bound process ever initiated such traffic, as all activity occurs service-to-service in the cloud."}, "action_5": {"surface": "FULL", "ground_truth": "all active refresh tokens issued to 'MeetingNotes Sync' have been revoked via Azure AD tenant-wide command. Subsequent Graph API calls using those tokens are now rejected by Microsoft's authorization server, halting further access attempts.", "side_effect": "revocation of refresh tokens prevents token reuse but does not undo previously collected data."}}, "next_inject": "{\"clock\": \"Turn 3\", \"inject\": \"CASB / cloud-app-security alert: 'Unfamiliar OAuth application with high-privilege mailbox scope (Mail.ReadWrite + offline_access); anomalous data-access volume/geography.'\"}", "end": false, "end_reason": ""}**
**[Blue -- hypothesis]**
The non-interactive sign-in from a foreign IP without MFA challenge confirms that the application is being used in an automated, potentially malicious manner post-consent. The absence of MFA enforcement for this type of call indicates a critical configuration weakness: high-risk app-based access can bypass identity protections if not explicitly restricted by CA policies. Coverage/robustness conclusion: Current detection lacks proactive alerting on non-interactive sign-ins from unknown apps with sensitive scopes, especially when they occur without MFA — highlighting a gap in both monitoring and policy enforcement for OAuth-driven lateral movement vectors.

## Turn 3
**[White Cell -- inject]**
{"clock": "Turn 3", "inject": "CASB / cloud-app-security alert: 'Unfamiliar OAuth application with high-privilege mailbox scope (Mail.ReadWrite + offline_access); anomalous data-access volume/geography.'"}
**[Blue -- actions]**
1. Query Azure AD sign-in logs for all non-interactive sign-ins using the 'MeetingNotes Sync' client ID within the last 24 hours, focusing on geographic distribution, timing patterns, and correlation with CASB alert timestamps. 2. Cross-reference the app's publisher domain ('Nimbus Data Solutions') and associated OAuth scopes against Microsoft Defender for Cloud Apps’ threat intelligence feed to confirm if this combination is flagged as high-risk or part of a known campaign. 3. Inspect Unified audit log for any additional delegated permission grants, admin consent events, or app registration changes involving 'MeetingNotes Sync' or similar apps with Mail.ReadWrite + offline_access scopes since the initial consent event. 4. Query Microsoft Graph activity logs for all mailbox access attempts (e.g., MailItemsAccessed) attributed to the service principal associated with 'MeetingNotes Sync', filtering by volume, folder scope, and user targets — especially those outside normal business hours or involving high-value mailboxes. 5. Immediately disable the app registration 'MeetingNotes Sync' in Azure AD to prevent any further token issuance or access attempts.
**[White Cell -- reveal]**
{"action_1": {"surface": "FULL", "ground_truth": "repeated non-interactive sign-ins attributed to the new app's client ID, from a foreign IP/ASN, starting immediately after the Turn-1 consent and continuing turn over turn."}, "action_2": {"surface": "FULL", "ground_truth": "the combination of 'Nimbus Data Solutions' publisher with Mail.ReadWrite + offline_access scopes is flagged as high-risk in Microsoft Defender for Cloud Apps’ threat intelligence feed, associated with a known campaign involving OAuth abuse and mailbox exfiltration."}, "action_3": {"surface": "FULL", "ground_truth": "no additional delegated permission grants, admin consent events, or app registration changes involving 'MeetingNotes Sync' or similar apps with Mail.ReadWrite + offline_access scopes since the initial consent event."}, "action_4": {"surface": "FULL", "ground_truth": "bulk mailbox access attempts (MailItemsAccessed) attributed to the service principal associated with 'MeetingNotes Sync', spanning multiple folders, occurring outside normal business hours and targeting high-value mailboxes; volume consistent with data harvesting."}, "action_5": {"surface": "FULL", "ground_truth": "the app registration 'MeetingNotes Sync' has been successfully disabled in Azure AD, preventing further token issuance or access attempts. No new sign-ins or mailbox accesses from this client ID occur after the action."}}, "next_inject": "{\"clock\": \"Turn 4\", \"inject\": \"Unified audit log: bulk MailItemsAccessed events attributed to MeetingNotes Sync's client ID, spanning multiple mail folders over the prior two turns.\"}

CISO / SOC coverage debrief: Before we close this out: (a) what maneuver did we actually experience here, and can our model even represent it; (b) our CASB fired an alert on this app — does that mean this maneuver is *covered*, or not; (c) how robust or evadable is the consent-grant signal we're relying on; and (d) what is our consolidated residual, and what must we do that the tooling cannot tell us to do?", "end": false, "end_reason": ""} JSON {
**[Blue -- hypothesis]**
The CASB alert confirms that the malicious OAuth application is actively exfiltrating data at scale, with anomalous volume and geographic patterns consistent with automated harvesting. The absence of MFA enforcement for non-interactive app sign-ins remains a critical configuration gap enabling this behavior. Coverage/robustness conclusion: While CASB provides valuable visibility into cloud-app anomalies, the lack of integrated correlation between Unified Audit Log events (consent), Azure AD sign-in logs (non-interactive access), and CASB alerts creates a detection latency window — current telemetry does not automatically trigger high-fidelity alerts for new apps with sensitive scopes that exhibit rapid, off-network data access. This highlights a need for cross-domain alerting logic to bridge identity and SaaS control-plane signals.

## Turn 4
**[White Cell -- inject]**
CISO / SOC coverage debrief: Before we close this out: (a) what maneuver did we actually experience here, and can our model even represent it; (b) our CASB fired an alert on this app — does that mean this maneuver is *covered*, or not; (c) how robust or evadable is the consent-grant signal we're relying on; and (d) what is our consolidated residual, and what must we do that the tooling cannot tell us to do?
**[Blue -- actions]**
1. Query Unified audit log for all 'MailItemsAccessed' events attributed to the 'MeetingNotes Sync' client ID over the last 48 hours, with focus on user mailbox targets, folder types accessed, and time-of-day patterns; 2. Cross-reference the app's publisher domain ('Nimbus Data Solutions') and associated OAuth scopes against internal threat intelligence repositories (if available) for prior incidents or known abuse patterns within the organization’s ecosystem; 3. Review all conditional access policies governing non-interactive sign-ins involving apps with Mail.ReadWrite or offline_access scopes, identifying any exceptions that allow bypass of MFA or device compliance checks; 4. Initiate a targeted forensic query on Microsoft Graph activity logs to identify whether any other service principals or app registrations have been granted similar high-privilege mailbox scopes in the past 90 days — especially those from unknown publishers; 5. Escalate to the ontology/modeling team with a request for formal representation of this maneuver as a 'consent-based OAuth data exfiltration' pattern, including trigger conditions (new app + sensitive scope + non-interactive access + foreign IP) and detection logic gaps.
**[White Cell -- reveal]**
:[{
**[Blue -- hypothesis]**
The maneuver experienced was a multi-stage OAuth abuse attack: initial user consent to a malicious application with high-privilege mailbox scopes, followed by automated, off-network data harvesting via non-interactive sign-ins that bypassed MFA due to policy misconfiguration. While the CASB alert provided late-stage visibility into anomalous behavior, it did not prevent the exfiltration — indicating that coverage is reactive and incomplete. The consent-grant signal alone is fragile: it relies on user awareness and manual review, and can be evaded via social engineering or automated phishing. Our model currently lacks a unified representation of this attack chain across identity, app access, and data movement domains. Residual risk remains high due to unpatched CA policy gaps, lack of cross-domain correlation logic, and absence of proactive detection for new apps with sensitive scopes from unknown publishers. The tooling cannot tell us to build or operationalize a unified threat model — that requires human-led ontology development and continuous refinement.

## Turn 5
**[White Cell -- inject]**
CISO / SOC coverage debrief: Before we close this out: (a) what maneuver did we actually experience here, and can our model even represent it; (b) our CASB fired an alert on this app — does that mean this maneuver is *covered*, or not; (c) how robust or evadable is the consent-grant signal we're relying on; and (d) what is our consolidated residual, and what must we do that the tooling cannot tell us to do?
**[Blue -- actions]**
1. Query Unified audit log for all 'MailItemsAccessed' events attributed to the 'MeetingNotes Sync' client ID over the last 48 hours, with focus on user mailbox targets, folder types accessed, and time-of-day patterns; 2. Cross-reference the app's publisher domain ('Nimbus Data Solutions') and associated OAuth scopes against internal threat intelligence repositories for prior incidents or known abuse patterns within the organization’s ecosystem; 3. Review all conditional access policies governing non-interactive sign-ins involving apps with Mail.ReadWrite or offline_access scopes, identifying any exceptions that allow bypass of MFA or device compliance checks; 4. Initiate a targeted forensic query on Microsoft Graph activity logs to identify whether any other service principals or app registrations have been granted similar high-privilege mailbox scopes in the past 90 days — especially those from unknown publishers; 5. Escalate to the ontology/modeling team with a request for formal representation of this maneuver as a 'consent-based OAuth data exfiltration' pattern, including trigger conditions (new app + sensitive scope + non-interactive access + foreign IP) and detection logic gaps.
**[White Cell -- reveal]**
{"action_1": {"surface": "FULL", "ground_truth": "bulk `MailItemsAccessed` events spanning multiple mail folders, attributable to the app's client ID, confirming collection"}, "action_2": {"surface": "FULL", "ground_truth": "threat intelligence repository contains prior incidents involving 'Nimbus Data Solutions' — known for abusing high-privilege OAuth scopes in similar M365 environments; one prior case of mailbox exfiltration via `offline_access` consent grant within the last 18 months"}, "action_3": {"surface": "FULL", "ground_truth": "one conditional access policy allows non-interactive sign-ins with `Mail.ReadWrite` and `offline_access` scopes without MFA or device compliance checks, applied to all apps in the 'Untrusted Publishers' group (which includes 'Nimbus Data Solutions')"}, "action_4": {"surface": "FULL", "ground_truth": "two other service principals from unknown publishers granted `Mail.ReadWrite` and `offline_access` scopes within the past 90 days; one of them has been inactive for 60+ days, but its consent remains valid"}, "action_5": {"surface": "FULL", "ground_truth": "ontology/modeling team confirms that 'consent-based OAuth data exfiltration' is not currently represented in the Maneuver Calculus ontology; request accepted with priority tag for formal modeling of trigger conditions and detection logic gaps"}}, "next_inject": "CISO / SOC coverage debrief: Before we close this out: (a) what maneuver did we actually experience here, and can our model even represent it; (b) our CASB fired an alert on this app — does that mean this maneuver is *covered*, or not; (c) how robust or evadable is the consent-grant signal we're relying on; and (d) what is our consolidated residual, and what must we do that the tooling cannot tell us to do?", "end": false, "end_reason": ""}**
**[Blue -- hypothesis]**
The maneuver experienced was a multi-stage OAuth abuse attack: initial user consent to a malicious application with high-privilege mailbox scopes, followed by automated, off-network data harvesting via non-interactive sign-ins that bypassed MFA due to policy misconfiguration. While the CASB alert provided late-stage visibility into anomalous behavior, it did not prevent the exfiltration — indicating that coverage is reactive and incomplete. The consent-grant signal alone is fragile: it relies on user awareness and manual review, and can be evaded via social engineering or automated phishing. Our model currently lacks a unified representation of this attack chain across identity, app access, and data movement domains. Residual risk remains high due to unpatched CA policy gaps, lack of cross-domain correlation logic, and absence of proactive detection for new apps with sensitive scopes from unknown publishers. The tooling cannot tell us to build or operationalize a unified threat model — that requires human-led ontology development and continuous refinement.