Dev-0270 Registry IOC - September 2022

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Id	2566e99f-ad0f-472a-b9ac-d3899c9283e6
Rulename	Dev-0270 Registry IOC - September 2022
Description	The query below identifies modification of registry by Dev-0270 actor to disable security feature as well as to add ransom notes
Severity	High
Tactics	Impact
Techniques	T1486
Required data connectors	MicrosoftThreatProtection SecurityEvents WindowsSecurityEvents
Kind	Scheduled
Query frequency	6h
Query period	6h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270RegistryIOCSep2022.yaml
Version	1.0.3
Arm template	2566e99f-ad0f-472a-b9ac-d3899c9283e6.json

KQL

(union isfuzzy=true
(SecurityEvent
| where EventID == 4688
| where (CommandLine has_all  ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f') and CommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource'))
  or CommandLine has_all ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
),
(DeviceProcessEvents 
| where (InitiatingProcessCommandLine has_all(@'"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f') 
   and InitiatingProcessCommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource') ) 
   or InitiatingProcessCommandLine has_all('"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
| extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName), Computer = DeviceName
 )
 )
| extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
| extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])

YAML

queryPeriod: 6h
query: |
  (union isfuzzy=true
  (SecurityEvent
  | where EventID == 4688
  | where (CommandLine has_all  ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f') and CommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource'))
    or CommandLine has_all ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
  | project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
  ),
  (DeviceProcessEvents 
  | where (InitiatingProcessCommandLine has_all(@'"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f') 
     and InitiatingProcessCommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource') ) 
     or InitiatingProcessCommandLine has_all('"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
  | extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName), Computer = DeviceName
   )
   )
  | extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
  | extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])  
name: Dev-0270 Registry IOC - September 2022
entityMappings:
- fieldMappings:
  - columnName: Account
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: Computer
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: DnsDomain
  entityType: Host
queryFrequency: 6h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270RegistryIOCSep2022.yaml
tags:
- Dev-0270
requiredDataConnectors:
- connectorId: SecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: WindowsSecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
description: |
    'The query below identifies modification of registry by Dev-0270 actor to disable security feature as well as to add ransom notes'
kind: Scheduled
version: 1.0.3
status: Available
severity: High
relevantTechniques:
- T1486
triggerOperator: gt
triggerThreshold: 0
tactics:
- Impact
id: 2566e99f-ad0f-472a-b9ac-d3899c9283e6

ARM