ID | Technique | Tactic |
---|---|---|
T1136.003 | Cloud Account | Persistence |
T1136 | Create Account | Persistence |
Detection: AWS CreateLoginProfile
Description
The following analytic identifies the creation of a login profile for one AWS user by another, followed by a console login from the same source IP. It uses AWS CloudTrail logs to correlate the CreateLoginProfile
and ConsoleLogin
events based on the source IP and user identity. This activity is significant as it may indicate privilege escalation, where an attacker creates a new login profile to gain unauthorized access. If confirmed malicious, this could allow the attacker to escalate privileges and maintain persistent access to the AWS environment.
Search
1`cloudtrail` eventName = CreateLoginProfile
2| rename requestParameters.userName as new_login_profile
3| table src_ip eventName new_login_profile userIdentity.userName
4| join new_login_profile src_ip [
5| search `cloudtrail` eventName = ConsoleLogin
6| rename userIdentity.userName as new_login_profile
7| stats count values(eventName) min(_time) as firstTime max(_time) as lastTime by eventSource aws_account_id errorCode userAgent eventID awsRegion userIdentity.principalId user_arn new_login_profile src_ip
8| `security_content_ctime(firstTime)`
9| `security_content_ctime(lastTime)`]
10| `aws_createloginprofile_filter`
Data Source
Name | Platform | Sourcetype | Source |
---|---|---|---|
AWS CloudTrail ConsoleLogin | AWS | 'aws:cloudtrail' |
'aws_cloudtrail' |
AWS CloudTrail CreateLoginProfile | AWS | 'aws:cloudtrail' |
'aws_cloudtrail' |
Macros Used
Name | Value |
---|---|
cloudtrail | sourcetype=aws:cloudtrail |
aws_createloginprofile_filter | search * |
aws_createloginprofile_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Notable | Yes |
Rule Title | %name% |
Rule Description | %description% |
Notable Event Fields | user, dest |
Creates Risk Event | True |
Implementation
You must install splunk AWS add on and Splunk App for AWS. This search works with AWS CloudTrail logs.
Known False Positives
While this search has no known false positives, it is possible that an AWS admin has legitimately created a login profile for another user.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
User $user_arn$ is attempting to create a login profile for $new_login_profile$ and did a console login from this IP $src_ip$ | 72 | 90 | 80 |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | aws_cloudtrail |
aws:cloudtrail |
Integration | ✅ Passing | Dataset | aws_cloudtrail |
aws:cloudtrail |
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
Source: GitHub | Version: 3