Endpoint Security allowlist and blocklist

The Coro Endpoint Security allowlist and blocklist enable admin users with sufficient permissions to manage the access of files and folders deemed safe and block the execution of unsafe processes on a device. This allows admin users more control over what Coro monitors by:

• Suppressing possible false positive detections of files and folders considered safe by your organization.
• Excluding folders from being scanned by the Coro Agent to improve the Agent's performance.
• Blocking identified malicious processes from executing.

This article discusses the following topics:

• Managing allowlists and blocklists for Endpoint Security and EDR
• Accessing the Endpoint Security allowlist and blocklist
• Adding allowlist and blocklist records
• Deleting allowlist and blocklist records
• Searching and filtering allowlist and blocklist records

Managing allowlists and blocklists for Endpoint Security and EDR

Coro Endpoint Security and Endpoint Detection and Response (EDR) use separate allowlists and blocklists. The EDR allowlist prevents EDR tickets from triggering by marking processes and folders as safe (Coro also automatically stops process and telemetry collection for these items). The Endpoint Security allowlist excludes specific files or folders from Coro Agent scanning to prevent Endpoint Security ticket triggers. Both EDR and Endpoint Security blocklists actively block the execution of unsafe or non-trusted processes.

The following table outlines the differences between adding records to the Endpoint Security allowlist and blocklist, and adding records to the Endpoint Detection and Response (EDR) allowlist and blocklist:

You can add records to the allowlist and blocklist individually, or as a list contained in a CSV file.

Accessing the Endpoint Security allowlist and blocklist

1. Access Endpoint Security .
2. Select Allow/Block :

   

   Coro displays the Allow/Block page:

   

   The Allow/Block page displays a list of allowed file and folder records and blocked process records. The list contains the following columns:

   • Symbol : Specifies the record type:
     • : Process file path record.
     • : Process folder record.
     • : Process hash record.
   • Value : The value of the record, based on the record type. This value must be:
     • File path
     • Folder path
     • Process file hash

     note

     A process file hash is a fixed-size alphanumeric string representing file content, generated using cryptographic functions. Coro supports:

     • SHA-256 : A cryptographic hash function that generates a 256-bit hash from any input, commonly used for data integrity, digital signatures, and encryption.
   • List : Specifies whether the record is displayed on the allowlist or blocklist.
   • Description : (Optional) A short description of the record. When no value is specified, Coro displays N/A .

Adding allowlist and blocklist records

You can add allowlist or blocklist records individually or import them in bulk from a CSV file.

• Adding records individually
• Importing records from a CSV file

Using environment variables

The Coro Agent enables admin users to use environment variables when they add file and folder records to the allowlist or blocklist, either individually or through CSV import.

Environment variables act as placeholders for user or system-specific directories, automatically resolving to the correct paths. By using these variables, admin users can avoid manually entering file paths, reducing manual input, and ensuring accurate path application across different users and devices.

Coro supports the following environment variables:

• USERPROFILE : The profile folder of the current user.
  • Example without environment variable : C:\Users\JohnDoe\Documents\Projects
  • Example with environment variable : __USERPROFILE__\Documents\Projects

  __USERPROFILE__\Documents\Projects dynamically references each user's profile folder, eliminating the need to create separate entries for different users.

• TEMP : The temporary files directory for the current user.
  • Example without environment variable : C:\Users\JohnDoe\AppData\Local\Temp\TestFolder
  • Example with environment variable : __TEMP__\TestFolder

  __TEMP__\TestFolder dynamically references the current user's temporary folder on the device, eliminating the need to create separate entries for different users.

Adding records individually

To add an allowlist or blocklist record:

1. Select + ADD from the Allow/Block page.
2. Select Add to allowlist or Add to blocklist :

   

Adding a record to the allowlist

When you add a file or folder to the allowlist, Coro stops creating Malware on endpoint tickets related to it.

To add a record to the allowlist:

1. Select + ADD > Add to allowlist :

   

   Coro displays the Add to allowlist dialog.

2. Select File path or Folder path , then enter a valid file or folder path.

   note

   Coro supports the use of environment variables in file and folder paths on Windows and macOS devices.

   Important

   The file or folder path value must:

   • Be a valid file or folder path.
   • Not contain ' , ? , // , or | .
   • Not contain : if it contains / .
3. (Optional) Enter a description for the record.
4. Select SAVE :

   

   Coro adds the record to the allowlist and attaches a timestamp that shows when the record was allowed:

   

Adding a record to the blocklist

When you add a process to the blocklist, Coro blocks the execution of the process across your entire organization.

To add a process record to the blocklist:

1. Select + ADD > Add to blocklist :

   

   Coro displays the Add to allowlist dialog.

2. Enter a valid SHA-256 hash into the Process Hash field.

   Important

   SHA-256 hash values have a maximum string length of 64 characters.

3. (Optional) Enter a description for the record.
4. Select SAVE :

   

   Coro adds the process to the blocklist and attaches a timestamp that shows when the process was blocked:

   

   info

   If you have the EDR module enabled, you can also block a process from the EDR Processes page using the Block Process action. Process entries are shared between the blocklists of EDR and Endpoint Security.

Importing records from a csv file

Admin users can add records to the allowlist or blocklist by importing a CSV file containing a list of records.

To import records to the Endpoint Security allowlist or blocklist from a CSV file:

1. Select + ADD :

   

2. Select Import from CSV :

   

   Coro displays the Import CSV to allow / block list dialog:

   

3. (Optional) If you haven't created a valid CSV file, select Download our template to avoid invalid entries :

   

   Use the downloaded template to ensure all required columns are completed.

4. Select Click to upload :

   

   Alternatively, drag and drop the selected CSV file into the Import CSV to allow / block list dialog.

5. Select a valid CSV file:

   

   After you select the CSV file, Coro displays the filename in the file area of the Import CSV to allow / block list dialog:

   

   • (Optional) Select Remove to discard the selected CSV file and choose an alternative file:

     

6. Select IMPORT :

   

   Coro processes the CSV file.

   After completing the import process, Coro displays a summary of successfully imported records:

   

   If any records fail to import, the summary displays the number of invalid records out of the total number of records in the CSV file:

   

7. Select Try again to restart the import process, or select CLOSE .

   Coro adds the imported records to the Endpoint Security allowlist/blocklist:

   

CSV file validation

Entries in your CSV file must follow the pattern:

<Type>,<Value>,<List>,<Description>

Each entry must be on a separate line, with the following possible values in each field:

Files must abide by the following rules:

• You must specify valid values in all four columns. Coro ignores entries with extra columns or invalid values.
• The maximum file size is 10 MB.
• The CSV import filename must be in lowercase.
• A single CSV import file can contain a maximum of 500 records.
• When Type is Process :
  • Value must be a valid SHA-256 hash.

  note

  SHA-256 hash values have a maximum string length of 64 characters.

• When Type is File or Folder , Value must:
  • Be a valid file or folder path.
  • Not contain ' , ? , // , or | .
  • Not contain : if it contains / .
• Apply Allowed when Type is Folder or File .
• Apply Blocked when Type is Process .

Deleting allowlist and blocklist records

To delete a record from the allowlist or blocklist:

1. Select the three-dot menu to the right of the record.
2. Select Delete record :

   

   Coro deletes the record from the allowlist or blocklist.

Searching and filtering allowlist and blocklist records

Filter and search the EDR allowlist and blocklist to find specific entries. The Type filter enables you to filter allowlist and blocklist records by:

• Folder
• Process
• File

Perform a free text search across the Value and Description columns: