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

Back


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

name: SlackAudit - Public link created for file which can contain sensitive information.
kind: Scheduled
tactics:
- Exfiltration
triggerThreshold: 0
triggerOperator: gt
version: 1.0.0
status: Available
queryFrequency: 1h
id: 279316e8-8965-47d2-9788-b94dc352c853
requiredDataConnectors:
- connectorId: SlackAuditAPI
  dataTypes:
  - SlackAudit_CL
relevantTechniques:
- T1048
description: |
    'Detects public links for files which potentialy may contain sensitive data such as passwords, authentication tokens, secret keys.'
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
queryPeriod: 1h
severity: Medium
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

ARM