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

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Id	279316e8-8965-47d2-9788-b94dc352c853
Rulename	SlackAudit - Public link created for file which can contain sensitive information.
Description	Detects public links for files which potentialy may contain sensitive data such as passwords, authentication tokens, secret keys.
Severity	Medium
Tactics	Exfiltration
Techniques	T1048
Required data connectors	SlackAuditAPI
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditSensitiveFile.yaml
Version	1.0.0
Arm template	279316e8-8965-47d2-9788-b94dc352c853.json

KQL

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

YAML

relevantTechniques:
- T1048
name: SlackAudit - Public link created for file which can contain sensitive information.
triggerThreshold: 0
tactics:
- Exfiltration
severity: Medium
id: 279316e8-8965-47d2-9788-b94dc352c853
status: Available
requiredDataConnectors:
- dataTypes:
  - SlackAudit_CL
  connectorId: SlackAuditAPI
kind: Scheduled
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  
description: |
    'Detects public links for files which potentialy may contain sensitive data such as passwords, authentication tokens, secret keys.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditSensitiveFile.yaml
triggerOperator: gt
queryPeriod: 1h
queryFrequency: 1h
version: 1.0.0
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address

ARM