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Description

This search looks for AWS CloudTrail events where a user A who has already permission to update login profile, makes an API call to update login profile for another user B . Attackers have been know to use this technique for Privilege Escalation in case new victim(user B) has more permissions than old victim(user B)

  • Type: TTP
  • Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2021-07-19
  • Author: Bhavin Patel, Splunk
  • ID: 2a9b80d3-6a40-4115-11ad-212bf3d0d111

ATT&CK

ID Technique Tactic
T1136.003 Cloud Account Persistence
`cloudtrail` eventName = UpdateLoginProfile userAgent !=console.amazonaws.com errorCode = success
| search userIdentity.userName!=requestParameters.userName  
|  stats count min(_time) as firstTime max(_time) as lastTime  by requestParameters.userName src eventName eventSource aws_account_id errorCode userAgent eventID awsRegion userIdentity.userName user_arn 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)`
|`aws_updateloginprofile_filter`

Associated Analytic Story

How To Implement

You must install splunk AWS add on and Splunk App for AWS. This search works with AWS CloudTrail logs.

Required field

  • _time
  • eventName
  • userAgent
  • errorCode
  • requestParameters.userName

Kill Chain Phase

  • Actions on Objectives

Known False Positives

While this search has no known false positives, it is possible that an AWS admin has legitimately created keys for another user.

RBA

Risk Score Impact Confidence Message
30.0 50 60 From IP address $sourceIPAddress$, user agent $userAgent$ has trigged an event $eventName$ for updating the existing login profile, potentially giving user $user_arn$ more access privilleges

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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