aws detect sts assume role abuse
WARNING THIS IS A EXPERIMENTAL object
We have not been able to test, simulate, or build datasets for this object. Use at your own risk. This analytic is NOT supported.
Description
This search provides detection of suspicious use of sts:AssumeRole. These tokens can be created on the go and used by attackers to move laterally and escalate privileges.
- Type: Hunting
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2020-07-27
- Author: Rod Soto, Splunk
- ID: 8e565314-b6a2-46d8-9f05-1a34a176a662
Annotations
ATT&CK
ID | Technique | Tactic |
---|---|---|
T1078 | Valid Accounts | Defense Evasion, Initial Access, Persistence, Privilege Escalation |
Kill Chain Phase
- Exploitation
NIST
CIS20
CVE
Search
1
2
3
`cloudtrail` user_type=AssumedRole userIdentity.sessionContext.sessionIssuer.type=Role
| table sourceIPAddress userIdentity.arn user_agent user_access_key status action requestParameters.roleName responseElements.role.roleName responseElements.role.createDate
| `aws_detect_sts_assume_role_abuse_filter`
Macros
The SPL above uses the following Macros:
Note that aws_detect_sts_assume_role_abuse_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Required field
- _time
- user_type
- userIdentity.sessionContext.sessionIssuer.type
- sourceIPAddress
- userIdentity.arn
- user_agent
- user_access_key
- status
- action
- requestParameters.roleName
- esponseElements.role.roleName
- esponseElements.role.createDate
How To Implement
You must install splunk AWS add on and Splunk App for AWS. This search works with AWS CloudTrail logs
Known False Positives
Sts:AssumeRole can be very noisy as it is a standard mechanism to provide cross account and cross resources access. This search can be adjusted to provide specific values to identify cases of abuse.
Associated Analytic story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
25.0 | 50 | 50 | tbd |
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
source | version: 1