Regex for Indian Voters ID or EPIC Number is not working as expected.

Products

• Data Loss Prevention
• Data Loss Prevention API Detection for Developer Apps Virtual Appliance
• Data Loss Prevention API Detection Virtual Appliance
• Data Loss Prevention Cloud Detection Service
• Data Loss Prevention Cloud Detection Service for ICAP
• Data Loss Prevention Cloud Detection Service for REST
• Data Loss Prevention Cloud Package
• Data Loss Prevention Cloud Prevent for Microsoft Office 365
• Data Loss Prevention Cloud Service for Discovery/Connector
• Data Loss Prevention Cloud Service for Email
• Data Loss Prevention Cloud Storage
• Data Loss Prevention Data Access Governance
• Data Loss Prevention Discover Suite
• Data Loss Prevention Endpoint Discover
• Data Loss Prevention Endpoint Prevent
• Data Loss Prevention Endpoint Suite
• Data Loss Prevention Enforce
• Data Loss Prevention Enterprise Suite
• Data Loss Prevention for Office 365 Email and Gmail with Email Safeguard
• Data Loss Prevention Form Recognition
• Data Loss Prevention Network Discover
• Data Loss Prevention Network Email
• Data Loss Prevention Network Monitor
• Data Loss Prevention Network Monitor and Prevent for Email
• Data Loss Prevention Network Monitor and Prevent for Email and Web
• Data Loss Prevention Network Monitor and Prevent for Web
• Data Loss Prevention Network Prevent for Email
• Data Loss Prevention Network Prevent for Email Virtual Appliance
• Data Loss Prevention Network Prevent for Web Virtual Appliance
• Data Loss Prevention Network Protect
• Data Loss Prevention Network Web
• Data Loss Prevention Oracle Standard Edition 2
• Data Loss Prevention Plus Suite
• Data Loss Prevention Sensitive Image Recognition

Issue/Introduction

A custom regex based detection rule for Indian voters id was created with the following conditions:

Mandatory :

• ID is a unique alphanumeric code. combination of alphabets ( A to Z) and digits (0 to 9).
• Its length should equal to 10.
• ID starts with an alphabet and ends with a digit.
• ID does not contain whitespaces and other special characters.

Optional conditions :

• ID alphabets are Uppercase letters.
• Keywords: Voter ID or Voters ID or EPIC Number.

The created regex is ^[A-Z]{3}[0-9]{7}$

Regular Expression tester sites like https://www.regextester.com/ and https://regex101.com/ suggest the regex is correct and matches the following samples: 

XGN3002623

NSC0307223

XGS1234567

Cause

The Symantec DLP does not process the $ sign in the regex at the end.

Resolution

Remove the $ sign so now the RegEx is this ^[A-Z]{3}[0-9]{7} and detection will work as expected. 

The samples mentioned above are detected successfully now.

Additional Information

Please see About writing regular expressions for policy condition matching (techdocs.broadcom.com)