> For the complete documentation index, see [llms.txt](https://help.nightfall.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.nightfall.ai/data-exfiltration-prevention/exfiltration_endpoint/policies/trigger/uploads-paste-to-desktop-apps.md).

# Uploads, Paste to Desktop Apps

Intercepts data movement - file transfers, uploads, and paste events - within desktop applications. Nightfall monitors at the application layer, capturing events before they reach the network.

**Supported applications**

<table><thead><tr><th width="161.203125">Category</th><th>Applications</th></tr></thead><tbody><tr><td>Messaging</td><td>Slack, WhatsApp, iMessage, Signal, Telegram, Discord, Microsoft Teams</td></tr><tr><td>Email</td><td>Outlook, Apple Mail</td></tr><tr><td>AI assistants</td><td>ChatGPT, Claude, Microsoft Copilot</td></tr></tbody></table>

{% hint style="info" %}
**macOS + Windows (both):** Slack, WhatsApp, Signal, Telegram, Discord, Outlook, Microsoft Teams, ChatGPT, Claude, Microsoft Copilot

**macOS only:** iMessage, Apple Mail
{% endhint %}

**Scope options**

* All supported applications.
* Specific applications selected from the list above.

**Event types monitored**

* File attachments and transfers
* Uploads within app interfaces
* Paste events into app input fields

Domain collections are not used for this trigger. There is no session detection for desktop app events - monitoring applies to all account types within the monitored application.


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