Updated all required fields and datamodels again.

detections/cloud/aws_lambda_updatefunctioncode.yml

@@ -1,26 +1,24 @@
-name: AWS Lambda UpdateFunctionCode
-id: 211b80d3-6340-4345-11ad-212bf3d0d111
-version: 1
-date: '2022-02-24'
 author: Bhavin Patel, Splunk
-type: Hunting
 datamodel: []
+date: '2022-02-24'
 description: This analytic is designed to detect IAM users attempting to update/modify
   AWS lambda code via the AWS CLI to gain persistence, futher access into your AWS
   environment and to facilitate planting backdoors. In this instance, an attacker
   may upload malicious code/binary to a lambda function which will be executed automatically
   when the funnction is triggered.
+how_to_implement: You must install Splunk AWS Add on and enable Cloudtrail logs in
+  your AWS Environment.
+id: 211b80d3-6340-4345-11ad-212bf3d0d111
+known_false_positives: While this search has no known false positives, it is possible
+  that an AWS admin or an autorized IAM user has updated the lambda fuction code legitimately.
+name: AWS Lambda UpdateFunctionCode
+references:
+- http://detectioninthe.cloud/execution/modify_lambda_function_code/
+- https://sysdig.com/blog/exploit-mitigate-aws-lambdas-mitre/
 search: '`cloudtrail` eventSource=lambda.amazonaws.com eventName=UpdateFunctionCode*  errorCode
   = success  user_type=IAMUser | stats  count min(_time) as firstTime max(_time) as
   lastTime  values(requestParameters.functionName) as function_updated by src_ip user_arn
   user_agent user_type eventName aws_account_id |`aws_lambda_updatefunctioncode_filter`'
-how_to_implement: You must install Splunk AWS Add on and enable Cloudtrail logs in
-  your AWS Environment.
-known_false_positives: While this search has no known false positives, it is possible
-  that an AWS admin or an autorized IAM user has updated the lambda fuction code legitimately.
-references:
-- http://detectioninthe.cloud/execution/modify_lambda_function_code/
-- https://sysdig.com/blog/exploit-mitigate-aws-lambdas-mitre/
 tags:
   analytic_story:
   - Suspicious Cloud User Activities
@@ -48,21 +46,22 @@ tags:
   - DE.CM
   observable:
   - name: src_ip
+    role:
+    - Attacker
     type: IP Address
-    role:
-    - Attacker
   - name: user_arn
-    type: User
     role:
     - Attacker
+    type: User
   product:
   - Splunk Enterprise
   - Splunk Enterprise Security
   - Splunk Cloud
   required_fields:
   - _time
-  - eventName
-  - userAgent
   - errorCode
+  - eventName
   risk_score: 63
   security_domain: cloud
+type: Hunting
+version: 1