aws detect sts get session token 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:GetSessionToken. 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: 85d7b35f-b8b5-4b01-916f-29b81e7a0551
Annotations
ATT&CK
ID | Technique | Tactic |
---|---|---|
T1550 | Use Alternate Authentication Material | Defense Evasion, Lateral Movement |
Kill Chain Phase
- Exploitation
NIST
CIS20
CVE
Search
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`aws_cloudwatchlogs_eks` ASIA userIdentity.type=IAMUser
| spath eventName
| search eventName=GetSessionToken
| table sourceIPAddress eventTime userIdentity.arn userName userAgent user_type status region
| `aws_detect_sts_get_session_token_abuse_filter`
Macros
The SPL above uses the following Macros:
Note that aws_detect_sts_get_session_token_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
- userIdentity.type
- eventName
- sourceIPAddress
- eventTime
- userIdentity.arn
- userName
- userAgent
- user_type
- status
- region
How To Implement
You must install splunk AWS add-on and Splunk App for AWS. This search works with cloudwatch logs
Known False Positives
Sts:GetSessionToken can be very noisy as in certain environments numerous calls of this type can be executed. This search can be adjusted to provide specific values to identify cases of abuse. In specific environments the use of field requestParameters.serialNumber will need to be used.
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