Lark DLP (Data Loss Prevention)

Detect & Remediate Sensitive Messages and Files in Lark

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Lark DLP (Data Loss Prevention)

Lark DLP (Data Loss Prevention) helps organizations monitor, detect, and remediate sensitive data shared across Lark chats, docs, sheets, files, and external collaborators — in real time and historically.

As teams use Lark for messaging, document collaboration, and file sharing, sensitive data like PII, PCI, PHI, API keys, financial reports, and confidential contracts can easily spread across chats and shared workspaces.

Strac Lark DLP provides:

🔎 Real-time and historical Data Discovery & Classification
🚨 Instant alerts on sensitive data exposure
🛑 Blocking or nudging users before exfiltration
🧹 Redaction, masking, deletion, and access revocation
📊 Visibility into who has access to sensitive data
🔐 Control over external sharing and public links

✨ Why Lark DLP (Data Loss Prevention) Matters

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Lark is the work OS - you can post any messages or files including PII, PCI, PHI

Lark combines chat, docs, cloud storage, meetings, and collaboration into one ecosystem. That means:

Sensitive data moves quickly across chats and docs
Files get shared externally with partners and vendors
Public links may expose confidential information
Gen AI copy-paste from Lark to ChatGPT or other tools increases risk
Admins often lack deep visibility into data-level exposure

Without Lark DLP, you may only see that a file was shared — not whether it contains SSNs, credit card numbers, PHI, customer data, or proprietary information.

✨ What Strac Lark DLP Protects

Strac scans and protects:

1️⃣ Lark Chat Messages

One-to-one messages
Group chats
File attachments
Screenshots and PDFs (via OCR)

Detects:

SSNs, passport numbers
Credit cards (PCI)
Medical records (PHI)
API keys, secrets
Custom data elements (MRN, Subscriber ID, etc.)

2️⃣ Lark Drive & File Storage

Upload files in Lark just like one would do in Google Drive

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Uploaded files
Shared files
Public links
External collaborator access

You can:

Revoke public access
Remove external members
Delete or redact sensitive content
Apply classification labels

Real-Time Lark DLP (Data Loss Prevention) Controls

Strac enables multiple remediation modes:

🟢 Monitor Mode

Alert only
Send notifications to end user or admin
Log event for audit

🟡 Nudge Mode

Nudges user
Create employee awareness

🔴 Redact Mode

Redact message in real time or historical scan
Delete the underlying message or file

✨ Historical Scanning (DSPM for Lark)

Lark DLP isn’t just about forward-looking protection.

Strac also performs historical scanning to:

Discover existing sensitive data in chats and docs
Identify publicly exposed files
Detect excessive access permissions
Show who has access to what

This gives security teams:

A full data inventory
Access visibility
Compliance reporting
Risk prioritization

Sensitive Data Types Supported

Strac Lark DLP supports:

PII (SSN, passport, driver’s license, etc.)
PCI (credit cards)
PHI (medical info)
Financial data
API keys & secrets
Source code secrets
Custom regex + contextual keyword detection
ML + LLM-based classification
OCR for images and screenshots

Checkout entire catalog of sensitive data elements we support

Lark + Gen AI Risk Control

Employees often copy content from Lark chats or docs and paste it into:

ChatGPT
Gemini
Claude
Copilot

Strac integrates with:

So even if data leaves Lark and is uploaded into external tools, your policies still apply.

Compliance Use Cases

Lark DLP helps with:

SOC 2
HIPAA
PCI DSS
GDPR
ISO 27001

By providing:

Continuous monitoring
Evidence collection
Automated remediation
Data access reports

Deployment Options

You can deploy Strac Lark DLP in multiple ways:

SaaS (Cloud Processing)
- ML/OCR in Strac cloud
- Vault visibility
- Configurable data retention
SaaS (Local Regex Mode)
- Processing happens locally
- No content sent to cloud
- Risk metadata only stored
Self-Hosted (Customer AWS)
- Scanner deployed in your cloud
- Data never leaves environment
- Full control over processing

🎥 Why Choose Strac for Lark DLP?

Unlike traditional DLP tools that only alert, Strac:

Actually remediates risks
Covers SaaS + Cloud + Endpoint + Browser
Supports real-time and historical scanning
Provides granular data-level visibility
Enables practical bulk remediation
Supports contextual + ML detection
Tracks file lineage across environments

You don’t just get alerts — you reduce risk.

Strac is integrated with SaaS, Cloud, Browser, Gen AI and Endpoints

Frequently Asked Questions

Does Lark have built-in DLP?

Lark provides basic administrative controls, but it does not provide deep content inspection, advanced classification, OCR scanning, ML-based detection, or automated remediation like redaction and bulk access revocation.

Can Strac block sensitive messages in Lark chats?

Yes. In Redact Mode, Strac can redact sensitive messages or file uploads; essentially blocking messages

Can Strac scan historical Lark data?

Yes. Strac performs full historical scans across chats, docs, and files to discover existing sensitive data and exposure risks.

Does this work with Gen AI tools?

Yes. Strac extends protection beyond Lark via Browser and Endpoint DLP, preventing sensitive data from being uploaded into AI tools.

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Discover & Remediate PII, PCI, PHI, Sensitive Data

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Sharepoint DLP Use Cases

Practical Scenario

A hospital’s billing and administrative teams use SharePoint Online to store patient invoices, medical reports, and insurance forms. While collaborating with external insurance providers, a staff member accidentally updates the permissions on a SharePoint document library to “Anyone with the link,” exposing potentially thousands of patient files containing PHI.

How Strac's Sharepoint DLP Helps

Continuous Data Discovery: Strac automatically scans existing and newly uploaded documents, identifying PHI (e.g., medical record numbers, Social Security Numbers).
Classification & Labeling: Once identified, files are labeled (e.g., “HIPAA Sensitive”), ensuring that administrators know which documents require the highest level of protection.
Visibility into Access: Strac provides real-time insight into who has access to these sensitive documents. Administrators can instantly see if unauthorized users or broad groups have viewing rights.
Revoke Public Links: If a file is publicly accessible, Strac immediately revokes those links and restores restricted access.
Alerts & Quarantines: When someone attempts to share PHI externally, Strac can alert admins, quarantine the file for review, or completely block the action.
Audit-Ready Reports: All actions are logged, enabling quick incident response and demonstrating HIPAA compliance for audits.

Practical Scenario

A mid-sized investment firm uses SharePoint to collaborate on various client files, including:

Credit card statements (subject to PCI-DSS)
ID documents (Driver’s Licenses, Passports, etc.) used for KYC (Know Your Customer) verification
Banking information such as account and routing numbers

An associate accidentally shares a SharePoint folder containing these files with a newly onboarded client who does not require access to all confidential documents. This folder is also accessible to several internal teams outside the immediate project, creating multiple potential exposure points.

How Strac's Sharepoint DLP Helps

Comprehensive Data Discovery: Strac scans both existing and newly uploaded documents in SharePoint for sensitive information such as credit card numbers, bank account details, and ID documents (Driver’s License, Passport formats).
Classification & Automated Labeling: Once identified, Strac applies meaningful labels (e.g., “PCI-DSS Sensitive,” “PII – ID Documents,” “Banking Info”) to ensure these files stand out and are subject to stricter security rules.
Visibility into Access: Strac provides an immediate view of who currently has access to these sensitive files. This allows admins to spot situations where external clients or internal teams unnecessarily have permissions.
Public Access Revocation: If a labeled document (e.g., containing card data or ID scans) is found to be publicly shared or too broadly accessible, Strac automatically revokes these links or permissions, aligning access with the principle of least privilege.
Alerts, Quarantines, and Blocks: When a user attempts to share a labeled document with outside domains—or with an entire department—Strac alerts administrators or quarantines/blocks the file share, depending on policy settings.
In cases where the share is intentional but needs review, admins can approve or deny the request within Strac’s dashboard.
Audit & Compliance: Every sharing event, label assignment, and access revocation is logged, creating a detailed audit trail. This helps demonstrate compliance with PCI-DSS, KYC, AML, and other regulatory requirements.
Automatic reporting simplifies any regulatory or internal compliance audit, reducing the administrative burden on security and compliance teams.

Practical Scenario

A software company keeps source code, product roadmaps, and design specs in SharePoint. Several teams—including external contractors—use the same SharePoint site. A developer accidentally grants a large group, including some non-disclosure–exempt contractors, access to a folder containing patent-pending code.

How Strac's Sharepoint DLP Helps

Holistic File Scanning: Strac inspects documents, PDFs, and archives for code snippets, system designs, and proprietary business terms to detect potential IP.
Intelligent Labeling: Documents identified as containing IP or trade secrets are automatically classified (e.g., “Proprietary IP”), reinforcing the need for restricted sharing.
Real-Time Access Insights: With Strac, administrators can instantly see who has access to IP-tagged files, enabling them to remove unauthorized users or reduce permission scopes.
Immediate Link Removal: If a contractor or external partner is mistakenly granted access to IP, Strac revokes public or unauthorized sharing before the files can be downloaded.
Alerts & Blocking: Strac’s policies can be configured to alert security teams or block external sharing attempts for files containing proprietary content.
Incident Response & Auditing: Detailed logs of every share request, label change, and access revocation aid in quick incident resolution and help prove due diligence if legal issues arise.