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Introduction:
Windows Recall, Microsoft’s AI-driven screen history feature, was redesigned after major backlash to rely on hardware-backed encryption, Windows Hello, and Virtualization-Based Security (VBS) enclaves. The promise: even if malware runs on the same machine, it cannot access your captured snapshots without explicit user authentication. Security researcher Alexander Hagenah’s newly released TotalRecall Reloaded shatters that promise by demonstrating how “latent malware” can silently ride a legitimate authentication session, extracting screenshots, text history, messages, emails, and AI metadata—precisely the scenario Microsoft’s architecture was supposed to block.
Learning Objectives:
- Understand the trust boundary flaw in Windows Recall’s VBS enclave design that allows authenticated session hijacking.
- Execute step-by-step extraction of Recall data using TotalRecall Reloaded (for authorized security testing).
- Implement defensive registry, Group Policy, and monitoring controls to detect and block unauthorized Recall vault access.
You Should Know:
- The Trust Boundary Gap: Why “Secure Enclave” Doesn’t Protect After Authentication
Microsoft’s redesign placed Recall data inside a VBS enclave. When a user unlocks the vault via Windows Hello, the enclave decrypts screenshots and text in a protected region of memory. Only then does it pass plaintext data to legitimate processes (e.g., Recall search UI). The security assumption is that malware cannot inject into this authenticated flow. However, TotalRecall Reloaded exploits the gap: after the user authenticates, the tool holds the door open by hooking into the authorized session, then extracts everything Recall has ever captured.
Step‑by‑step explanation of how the bypass works (simplified):
- User logs into Windows and uses Recall normally (unlocks vault with Windows Hello).
- TotalRecall Reloaded, running with medium integrity, monitors for an active Recall session token.
- Once authentication occurs, the tool leverages the existing trusted channel—never breaking the enclave’s decryption itself.
- It then queries the Recall database (
Recall.db) and image store, copying all data before the session closes. - Microsoft’s stance: “The access patterns are consistent with intended protections” – because the malware rides the user’s own authentication, it’s not a technical “bypass” but a design flaw.
Verification commands (Windows PowerShell – admin not required if user authenticated):
Locate Recall database (typical path – actual location may vary) dir "$env:LOCALAPPDATA\Microsoft\Windows\Recall\" -Recurse Check if Recall is enabled Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsRecall" -Name "EnableRecall" -ErrorAction SilentlyContinue List Recall processes after unlocking Get-Process -Name "Recall", "RecallApp"
- Extracting Recall Data with TotalRecall Reloaded – Authorized Testing Guide
⚠️ Legal & Ethical Warning: Only run this on systems you own or have explicit written permission to test. Unauthorized extraction of Recall data violates privacy laws and computer misuse acts.
Step‑by‑step to extract your own Windows Recall vault (for research):
- Clone the tool (from the disclosed GitHub repository):
git clone https://github.com/xaitax/TotalRecall cd TotalRecall
-
Run the extraction (ensure Windows Recall is enabled and has captured activity):
Basic extraction – outputs JSON and screenshots python TotalRecall.py --output C:\Recall_Extract With OCR on all images (extracts text from screenshots) python TotalRecall.py --ocr --output C:\Recall_Extract_OCR
3. What gets extracted – the tool pulls:
- Full screenshot images (PNG/JPG) with timestamps.
– `Recall.db` SQLite database containing plaintext history of all on‑screen text (emails, chats, documents, URLs). - AI‑generated metadata (e.g., “user was reading a financial report”).
- Application focus events and window titles.
- Parse the database manually (alternative method without tool):
Copy Recall database (needs user context) copy "$env:LOCALAPPDATA\Microsoft\Windows\Recall\Recall.db" C:\temp\ Use sqlite3 to query sqlite3 C:\temp\Recall.db "SELECT datetime(timestamp,'unixepoch'), text FROM ocr_text LIMIT 10;"
Linux analysis (after transferring extracted data):
Extract text from screenshots using OCR
for img in /path/to/screenshots/.png; do
tesseract "$img" stdout >> extracted_text.txt
done
Parse JSON output with jq
cat recall_data.json | jq '.snapshots[] | {time: .timestamp, text: .ocr_text}'
3. Mitigation: Disabling Windows Recall Completely
Microsoft’s “not a vulnerability” stance means no patch is coming. Enterprises and privacy‑conscious users should disable Recall immediately.
Method 1 – Group Policy (Windows Pro/Enterprise):
Run as Administrator Disable Recall via Local Group Policy Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsRecall" -Name "EnableRecall" -Value 0 -Type DWord Also disable saving snapshots Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsRecall" -Name "DisableSnapshots" -Value 1 -Type DWord gpupdate /force
Method 2 – Registry (all editions):
Delete existing Recall database and disable feature Stop-Process -Name "Recall" -Force -ErrorAction SilentlyContinue Remove-Item -Path "$env:LOCALAPPDATA\Microsoft\Windows\Recall\" -Recurse -Force -ErrorAction SilentlyContinue New-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Recall" -Force | Out-Null New-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Recall" -Name "IsEnabled" -Value 0 -PropertyType DWord -Force
Method 3 – Via Windows Features (GUI alternative):
- Settings → Privacy & security → Recall & snapshots → Turn off “Save snapshots” and “Let Recall help me find things”.
4. Detecting Suspicious Access to the Recall Vault
Blue teams can monitor for unauthorized extraction attempts.
PowerShell monitoring script (run on endpoint):
Monitor Recall database access events (requires Sysmon or File Auditing)
$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = "$env:LOCALAPPDATA\Microsoft\Windows\Recall"
$watcher.Filter = ".db"
$watcher.EnableRaisingEvents = $true
Register-ObjectEvent $watcher "Created" -Action { Write-Host "ALERT: Recall DB accessed at $(Get-Date)" }
Log to Windows Event Log
Write-EventLog -LogName "Security" -Source "RecallMonitor" -EventId 5001 -Message "Recall vault access detected"
Sysmon rule to log reads of Recall folder (XML config snippet):
<Sysmon> <FileCreateTime> <TargetFilename condition="contains">Recall\Recall.db</TargetFilename> </FileCreateTime> </Sysmon>
Linux‑based SIEM correlation (e.g., with Wazuh):
<syscheck> <directories check_all="yes" realtime="yes">C:\Users\AppData\Local\Microsoft\Windows\Recall</directories> </syscheck>
- Enterprise Hardening: Block Recall via Intune / MDM
Organizations should deploy configuration profiles to prevent Recall from ever capturing data.
Intune Custom OMA-URI (Windows 11 24H2+):
./Device/Vendor/MSFT/Policy/Config/WindowsRecall/EnableRecall Integer value: 0
CSP command (via PowerShell as SYSTEM):
$namespace = "root\cimv2\mdm\dmmap"
$className = "MDM_Policy_Config01_WindowsRecall02"
Add-CimInstance -Namespace $namespace -ClassName $className -Property @{EnableRecall=0; InstanceID="WindowsRecall"; ParentID="./Vendor/MSFT/Policy/Config"}
Audit existing Recall data on endpoints:
Find any Recall databases larger than 0 bytes
Get-ChildItem -Path "C:\Users\" -Recurse -Filter "Recall.db" -ErrorAction SilentlyContinue | Where-Object {$_.Length -gt 0} | Select-Object FullName, Length, LastWriteTime
- Microsoft’s “Not a Vulnerability” – What It Means for Your Security Posture
Microsoft’s response confirms a dangerous precedent: if malware can execute under the same user account that legitimately unlocks Recall, Microsoft considers the resulting data extraction as “intended behavior”. This shifts the entire burden of protection onto the user’s session integrity – which is impossible to guarantee once any malware runs.
Key technical implication for defenders:
- Recall effectively transforms every user‑mode process into a potential keylogger + screen recorder, even after the feature is “secured” with VBS enclaves.
- The only reliable mitigation is to disable Recall entirely on all endpoints, especially for high‑value targets (executives, legal, finance, IT admins).
Contrast with Linux alternatives:
No mainstream Linux distribution includes a similar always‑on screen recording feature. If you need searchable activity history, consider ephemeral logging tools that are explicitly scoped and audited (e.g., `history` command, auditd, or purpose‑built DLP agents).
What Undercode Say:
- Authentication ≠ Authorization for Persistent Data Access – Microsoft confused “who you are” with “what a process can do after you authenticate”. TotalRecall Reloaded proves that once the vault is open, any process riding the user’s token can loot it.
- Secure Enclaves Alone Are Not Enough – VBS protected the decryption step but failed to protect the decrypted data in use. This is a classic “confused deputy” problem and will repeat in other TEE implementations (e.g., Intel SGX, AMD SEV) unless the entire data lifecycle is hardened.
- Enterprises Must Assume Recall Is Malware‑Friendly – Given Microsoft’s closing of the report, there will be no architectural fix. Security teams should treat Windows Recall as a high‑risk feature equivalent to a persistent screen recorder, and disable it via GPO/Intune immediately.
Prediction:
Within 12 months, multiple real‑world malware families (infostealers, ransomware initial access, corporate espionage) will integrate TotalRecall Reloaded’s techniques. Attackers will no longer need to deploy separate keyloggers or screenshot modules – they will simply query the victim’s existing Recall vault after a single authentication capture. This will force regulators (GDPR, CCPA, HIPAA) to classify Windows Recall as a “high‑risk processing activity”, potentially banning its use in healthcare, finance, and government sectors unless Microsoft introduces true hardware‑bound per‑process authorization. Until then, the most secure Windows 11 system is one where Recall never runs.
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IT/Security Reporter URL:
Reported By: Alexhagenah Breaking – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
