Bitglass - User Agent string has changed for user

Back


Id	4dd61530-859f-49e7-bd27-a173cb1a4589
Rulename	Bitglass - User Agent string has changed for user
Description	Detects when User Agent string has changed for user.
Severity	Medium
Tactics	InitialAccess
Techniques	T1078
Required data connectors	Bitglass
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml
Version	1.0.0
Arm template	4dd61530-859f-49e7-bd27-a173cb1a4589.json

KQL

Bitglass
| where EventType =~ 'access'
| where EventMessage =~ 'Login'
| summarize ua = makeset(HttpUserAgent) by User
| join (Bitglass
        | where EventType =~ 'access'
        | where EventMessage =~ 'Login') on User
| where ua !contains HttpUserAgent
| extend AccountCustomEntity = User

YAML

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml
queryFrequency: 1h
name: Bitglass - User Agent string has changed for user
severity: Medium
triggerThreshold: 0
query: |
  Bitglass
  | where EventType =~ 'access'
  | where EventMessage =~ 'Login'
  | summarize ua = makeset(HttpUserAgent) by User
  | join (Bitglass
          | where EventType =~ 'access'
          | where EventMessage =~ 'Login') on User
  | where ua !contains HttpUserAgent
  | extend AccountCustomEntity = User  
requiredDataConnectors:
- dataTypes:
  - Bitglass
  connectorId: Bitglass
relevantTechniques:
- T1078
status: Available
triggerOperator: gt
queryPeriod: 14d
description: |
    'Detects when User Agent string has changed for user.'
id: 4dd61530-859f-49e7-bd27-a173cb1a4589
version: 1.0.0
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
kind: Scheduled
tactics:
- InitialAccess

ARM