The file C:\Users\MikeSwanson\Claude\session-logs\2026-01-05-session.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file: 395→--- 396→ 397→### Recommendations 398→ 399→1. ✅ **COMPLETED:** Block direct M365 connections (transport rule) 400→2. ✅ **COMPLETED:** Remove phishing emails from all mailboxes 401→3. ✅ **COMPLETED:** Delete suspicious "true" app registration 402→4. **Consider:** External email warning banner for spoofed internal senders 403→5. **Consider:** User awareness training about QR code phishing 404→6. **Monitor:** Message trace for rejected bypass attempts 405→ 406→--- 407→ 408→### Autotask Ticket Notes (Copy/Paste Ready) 409→ 410→``` 411→TICKET: Phishing Attempt - Determine Entrypoint and Resolve 412→ 413→=== SUMMARY === 414→Investigated and remediated phishing attack. Identified bypass of MailProtector via direct M365 connection. Implemented transport rule to block future bypass attempts. Removed all phishing emails from mailboxes. 415→ 416→=== ROOT CAUSE === 417→Attackers sent phishing emails directly to dataforth-com.mail.protection.outlook.com, bypassing the MX records that point to MailProtector. M365 accepted these messages despite SPF failure because no transport rule was enforcing source IP restrictions. 418→ 419→=== ATTACK DETAILS === 420→- Campaigns: December 2025 "Bonus" + January 2026 "Pay Structure" 421→- Method: Spoofed internal senders, QR code in Word attachment 422→- Malicious URL: acuvatech.cyou (credential harvesting) 423→- Origin IP: 31.57.166.164 424→ 425→=== REMEDIATION COMPLETED === 426→ 427→1. DELETED PHISHING EMAILS (10 total) 428→ - Searched all 148 mailboxes via Graph API 429→ - Removed from: jlohr, jantar, croedig 430→ - Preserved internal discussion threads for audit 431→ 432→2. DELETED SUSPICIOUS APP REGISTRATION 433→ - App named "true" in Entra ID 434→ - Had Mail.Read/Mail.Send permissions 435→ - Never used, deleted as precaution 436→ 437→3. CONFIGURED MAIL FLOW PROTECTION 438→ 439→ A. Inbound Connector: "MailProtector Inbound" 440→ - Type: Partner organization 441→ - IPs: 52.0.31.31, 52.0.74.211, 52.0.70.91 442→ 443→ B. Transport Rule: "Mailptroctor Only (Reject Direct Mail)" 444→ - Priority: 0 445→ - Mode: Enforce 446→ - Condition: Sender outside organization 447→ - Action: Reject with "Direct Mail Not Allowed - Please route through MX" (5.7.1) 448→ - Exception: Sender IP in MailProtector range 449→ 450→4. VERIFIED FIX 451→ - Sent test emails from external IP 452→ - Messages accepted at SMTP but rejected by transport rule 453→ - No test emails delivered to inbox 454→ 455→=== SECURITY AUDIT FINDINGS === 456→- OAuth consents: Clean (no malicious apps) 457→- App registrations: Clean (removed "true" app) 458→- M365 bypass: FIXED 459→- MailProtector: Now enforced as only inbound path 460→ 461→=== RECOMMENDATIONS === 462→- Consider external email warning banner for spoofed internal senders 463→- User awareness training on QR code phishing 464→- Monitor message trace for rejected bypass attempts 465→``` 466→ 467→--- 468→ 469→### Key Commands Used This Session 470→ 471→```python 472→# Python script pattern for Graph API operations 473→import urllib.request 474→import json 475→ 476→# Get token 477→data = b'client_id=7a8c0b2e-57fb-4d79-9b5a-4b88d21b1f29&client_secret=tXo8Q~ZNG9zoBpbK9HwJTkzx.YEigZ9AynoSrca3&scope=https://graph.microsoft.com/.default&grant_type=client_credentials' 478→req = urllib.request.Request('https://login.microsoftonline.com/7dfa3ce8-c496-4b51-ab8d-bd3dcd78b584/oauth2/v2.0/token', data=data, method='POST') 479→resp = urllib.request.urlopen(req) 480→token = json.loads(resp.read())['access_token'] 481→ 482→# Delete message from mailbox 483→del_url = f"https://graph.microsoft.com/v1.0/users/{email}/messages/{msg_id}" 484→del_req = urllib.request.Request(del_url, method='DELETE') 485→del_req.add_header('Authorization', f'Bearer {token}') 486→urllib.request.urlopen(del_req) 487→``` 488→ 489→```python 490→# SMTP bypass test pattern 491→import socket 492→sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 493→sock.connect(('dataforth-com.mail.protection.outlook.com', 25)) 494→# Send EHLO, MAIL FROM, RCPT TO, DATA, message 495→``` 496→