Privilege escalation with admin managed policy

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Id	49ce5322-60d7-4b02-ad79-99f650aa5790
Rulename	Privilege escalation with admin managed policy
Description	Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on admin managed policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.
Severity	Medium
Tactics	PrivilegeEscalation
Techniques	T1484
Required data connectors	AWS
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_PrivilegeEscalationAdminManagedPolicy.yaml
Version	1.0.1
Arm template	49ce5322-60d7-4b02-ad79-99f650aa5790.json

KQL

AWSCloudTrail
| where  EventName in ("AttachUserPolicy","AttachRolePolicy","AttachGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
| where tostring(parse_json(RequestParameters).policyArn) contains "Admin" and tostring(parse_json(RequestParameters).policyArn) !contains "FullAccess" and tostring(parse_json(RequestParameters).policyArn) !startswith "arn:aws:iam::aws:policy/AdministratorAccess"
| extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)
| extend UserName = tostring(split(UserIdentityArn, '/')[-1])
| extend AccountName = case( UserIdentityPrincipalid == "Anonymous", "Anonymous", isempty(UserIdentityUserName), UserName, UserIdentityUserName)
| extend AccountName = iif(AccountName contains "@", tostring(split(AccountName, '@', 0)[0]), AccountName),
  AccountUPNSuffix = iif(AccountName contains "@", tostring(split(AccountName, '@', 1)[0]), "")
| project TimeGenerated, EventName, EventTypeName, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent, RecipientAccountId, AccountName, AccountUPNSuffix, UserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, EventSource, AdditionalEventData, RequestParameters, ResponseElements, UserIdentityArn
| extend timestamp = TimeGenerated

YAML

triggerOperator: gt
queryFrequency: 1d
requiredDataConnectors:
- connectorId: AWS
  dataTypes:
  - AWSCloudTrail
relevantTechniques:
- T1484
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  - identifier: CloudAppAccountId
    columnName: RecipientAccountId
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SourceIpAddress
query: |
  AWSCloudTrail
  | where  EventName in ("AttachUserPolicy","AttachRolePolicy","AttachGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
  | where tostring(parse_json(RequestParameters).policyArn) contains "Admin" and tostring(parse_json(RequestParameters).policyArn) !contains "FullAccess" and tostring(parse_json(RequestParameters).policyArn) !startswith "arn:aws:iam::aws:policy/AdministratorAccess"
  | extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)
  | extend UserName = tostring(split(UserIdentityArn, '/')[-1])
  | extend AccountName = case( UserIdentityPrincipalid == "Anonymous", "Anonymous", isempty(UserIdentityUserName), UserName, UserIdentityUserName)
  | extend AccountName = iif(AccountName contains "@", tostring(split(AccountName, '@', 0)[0]), AccountName),
    AccountUPNSuffix = iif(AccountName contains "@", tostring(split(AccountName, '@', 1)[0]), "")
  | project TimeGenerated, EventName, EventTypeName, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent, RecipientAccountId, AccountName, AccountUPNSuffix, UserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, EventSource, AdditionalEventData, RequestParameters, ResponseElements, UserIdentityArn
  | extend timestamp = TimeGenerated  
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_PrivilegeEscalationAdminManagedPolicy.yaml
queryPeriod: 1d
name: Privilege escalation with admin managed policy
status: Available
kind: Scheduled
description: |
    'Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on admin managed policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.'
id: 49ce5322-60d7-4b02-ad79-99f650aa5790
version: 1.0.1
tactics:
- PrivilegeEscalation
severity: Medium

ARM