SlackAudit - Public link created for file which can contain sensitive information

SlackAudit
| where Action =~ 'file_public_link_created'
| where EntityFileName == 'id_rsa' or EntityFileName contains 'password' or EntityFileName contains 'key' or EntityFileName contains '_key' or EntityFileName contains '.ssh' or EntityFileName endswith '.npmrc' or EntityFileName endswith '.muttrc' or EntityFileName contains 'config.json' or EntityFileName contains '.gitconfig' or EntityFileName endswith '.netrc' or EntityFileName endswith 'package.json' or EntityFileName endswith 'Gemfile' or EntityFileName endswith 'bower.json' or EntityFileName endswith 'config.gypi' or EntityFileName endswith 'travis.yml'
| extend AccountCustomEntity = SrcUserName
| extend IPCustomEntity = SrcIpAddr

name: SlackAudit - Public link created for file which can contain sensitive information.
relevantTechniques:
- T1048
requiredDataConnectors:
- dataTypes:
  - SlackAudit_CL
  connectorId: SlackAuditAPI
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditSensitiveFile.yaml
query: |
  SlackAudit
  | where Action =~ 'file_public_link_created'
  | where EntityFileName == 'id_rsa' or EntityFileName contains 'password' or EntityFileName contains 'key' or EntityFileName contains '_key' or EntityFileName contains '.ssh' or EntityFileName endswith '.npmrc' or EntityFileName endswith '.muttrc' or EntityFileName contains 'config.json' or EntityFileName contains '.gitconfig' or EntityFileName endswith '.netrc' or EntityFileName endswith 'package.json' or EntityFileName endswith 'Gemfile' or EntityFileName endswith 'bower.json' or EntityFileName endswith 'config.gypi' or EntityFileName endswith 'travis.yml'
  | extend AccountCustomEntity = SrcUserName
  | extend IPCustomEntity = SrcIpAddr  
tactics:
- Exfiltration
description: |
    'Detects public links for files which potentialy may contain sensitive data such as passwords, authentication tokens, secret keys.'
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
queryFrequency: 1h
triggerOperator: gt
version: 1.0.0
queryPeriod: 1h
status: Available
kind: Scheduled
severity: Medium
triggerThreshold: 0
id: 279316e8-8965-47d2-9788-b94dc352c853

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/279316e8-8965-47d2-9788-b94dc352c853')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/279316e8-8965-47d2-9788-b94dc352c853')]",
      "properties": {
        "alertRuleTemplateName": "279316e8-8965-47d2-9788-b94dc352c853",
        "customDetails": null,
        "description": "'Detects public links for files which potentialy may contain sensitive data such as passwords, authentication tokens, secret keys.'\n",
        "displayName": "SlackAudit - Public link created for file which can contain sensitive information.",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditSensitiveFile.yaml",
        "query": "SlackAudit\n| where Action =~ 'file_public_link_created'\n| where EntityFileName == 'id_rsa' or EntityFileName contains 'password' or EntityFileName contains 'key' or EntityFileName contains '_key' or EntityFileName contains '.ssh' or EntityFileName endswith '.npmrc' or EntityFileName endswith '.muttrc' or EntityFileName contains 'config.json' or EntityFileName contains '.gitconfig' or EntityFileName endswith '.netrc' or EntityFileName endswith 'package.json' or EntityFileName endswith 'Gemfile' or EntityFileName endswith 'bower.json' or EntityFileName endswith 'config.gypi' or EntityFileName endswith 'travis.yml'\n| extend AccountCustomEntity = SrcUserName\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration"
        ],
        "techniques": [
          "T1048"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}