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mukul975 cb8d79e068 Map all 754 skills to MITRE ATT&CK v19.1

- Add validated mitre_attack frontmatter to all 754 skills (286 distinct
  techniques), verified against MITRE ATT&CK v19.1 via the official
  mitreattack-python library: 0 revoked, deprecated, or invalid IDs
- Curate precise per-skill technique IDs for forensics, malware-analysis,
  threat-intel, and red-team skills (e.g. DCSync -> T1003.006,
  Kerberoasting -> T1558.003, Pass-the-Ticket -> T1550.003)
- Reconcile v19.1 tactic restructuring: Defense Evasion split into
  Stealth (TA0005) and Defense Impairment (TA0112); revoked T1562.*
  family and T1070.001/.002 remapped to active equivalents (T1685.*)
- Normalize word-split tags across 35 skills (remove filename-derived
  stopword tags, add semantic cybersecurity tags)
- Add api-reference.md for 3 skills that were missing it
- Update README ATT&CK section with accurate v19.1 tactic distribution

2026-06-01 12:13:29 +02:00

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Analyzing Office 365 Audit Logs for Compromise

Overview

Business Email Compromise (BEC) attacks often leave traces in Office 365 audit logs: suspicious inbox rule creation, email forwarding to external addresses, mailbox delegation changes, and unauthorized OAuth application consent grants. This skill uses the Microsoft Graph API to query the Unified Audit Log, enumerate inbox rules across mailboxes, detect forwarding configurations, and identify compromised account indicators.

When to Use

When investigating security incidents that require analyzing office365 audit logs for compromise
When building detection rules or threat hunting queries for this domain
When SOC analysts need structured procedures for this analysis type
When validating security monitoring coverage for related attack techniques

Prerequisites

Azure AD app registration with AuditLog.Read.All, MailboxSettings.Read, Mail.Read (application permissions)
Python 3.9+ with msal, requests
Client secret or certificate for authentication
Global Reader or Security Reader role

Steps

Authenticate to Microsoft Graph using MSAL client credentials flow
Query Unified Audit Log for suspicious operations (Set-Mailbox, New-InboxRule)
Enumerate inbox rules across mailboxes and flag forwarding rules
Detect mailbox delegation changes (Add-MailboxPermission)
Identify OAuth consent grants to suspicious applications
Check for suspicious sign-in patterns from audit logs
Generate compromise indicator report with timeline

Expected Output

JSON report listing forwarding rules, delegation changes, OAuth grants, and suspicious audit events with risk scores
Timeline of compromise indicators with affected mailboxes

2.3 KiB Raw Blame History