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https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
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mukul975
915ea611e5
Skills added: - implementing-privileged-access-workstation (IAM, PAW hardening) - detecting-suspicious-oauth-application-consent (cloud security, Graph API) - performing-hardware-security-module-integration (cryptography, PKCS#11) - analyzing-android-malware-with-apktool (malware analysis, androguard) - hunting-for-unusual-service-installations (threat hunting, T1543.003) - detecting-shadow-it-cloud-usage (cloud security, proxy/DNS log analysis) - performing-active-directory-forest-trust-attack (red team, impacket) - implementing-deception-based-detection-with-canarytoken (deception, Canary API) - analyzing-office365-audit-logs-for-compromise (cloud security, BEC detection) - hunting-for-startup-folder-persistence (threat hunting, T1547.001) Each skill includes SKILL.md, LICENSE, scripts/agent.py, references/api-reference.md
67 lines
2.8 KiB
Markdown
67 lines
2.8 KiB
Markdown
# API Reference — Analyzing Office 365 Audit Logs for Compromise
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## Libraries Used
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- **msal**: Microsoft Authentication Library — client credentials flow for Graph API
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- **requests**: HTTP client for Graph API calls with pagination
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## CLI Interface
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```
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python agent.py --tenant-id T --client-id C --client-secret S audit-logs --days 7
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python agent.py --tenant-id T --client-id C --client-secret S inbox-rules --user user@domain.com
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python agent.py --tenant-id T --client-id C --client-secret S forwarding --user user@domain.com
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python agent.py --tenant-id T --client-id C --client-secret S oauth
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python agent.py --tenant-id T --client-id C --client-secret S full --users user1@d.com user2@d.com --days 7
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```
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## Core Functions
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### `get_access_token(tenant_id, client_id, client_secret)` — MSAL auth
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Uses `ConfidentialClientApplication.acquire_token_for_client()` with
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`https://graph.microsoft.com/.default` scope.
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### `query_audit_logs(token, days)` — Suspicious operation detection
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Queries `/auditLogs/directoryAudits` for 11 suspicious operations:
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New-InboxRule, Set-InboxRule, Set-Mailbox, Add-MailboxPermission,
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UpdateInboxRules, New-TransportRule, etc.
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### `check_inbox_rules(token, user_id)` — Forwarding rule detection
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GET `/users/{id}/mailFolders/inbox/messageRules`. Checks `actions` for
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`forwardTo`, `forwardAsAttachmentTo`, `redirectTo`. Flags external forwards
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and delete-after-forward patterns.
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### `check_mailbox_forwarding(token, user_id)` — SMTP forwarding check
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GET `/users/{id}/mailboxSettings`. Checks auto-reply status and external audience.
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### `check_oauth_grants(token)` — OAuth consent audit
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GET `/oauth2PermissionGrants`. Flags grants with Mail.Read, Mail.ReadWrite,
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Mail.Send, Files.ReadWrite.All, MailboxSettings.ReadWrite.
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### `full_audit(token, users, days)` — Comprehensive compromise analysis
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## Microsoft Graph Endpoints
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| Endpoint | Method | Permission |
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|----------|--------|-----------|
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| `/auditLogs/directoryAudits` | GET | `AuditLog.Read.All` |
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| `/users/{id}/mailFolders/inbox/messageRules` | GET | `MailboxSettings.Read` |
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| `/users/{id}/mailboxSettings` | GET | `MailboxSettings.Read` |
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| `/oauth2PermissionGrants` | GET | `Directory.Read.All` |
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## Inbox Rule Risk Scoring
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| Factor | Points |
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|--------|--------|
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| Forwarding rule present | +40 |
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| Delete after forward | +25 |
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| External forward address | +20 |
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| Mark as read + forward | +15 |
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## Suspicious Operations Monitored
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New-InboxRule, Set-InboxRule, Set-Mailbox, Add-MailboxPermission,
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Set-MailboxJunkEmailConfiguration, Set-OwaMailboxPolicy, New-TransportRule,
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Add-RecipientPermission, Set-TransportRule, UpdateInboxRules,
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Set-MailboxAutoReplyConfiguration
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## Dependencies
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- `msal` >= 1.24.0
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- `requests` >= 2.28.0
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- Azure AD app with `AuditLog.Read.All`, `MailboxSettings.Read`, `Mail.Read`
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