ID | Technique | Tactic |
---|---|---|
T1078 | Valid Accounts | Defense Evasion |
T1078.001 | Default Accounts | Initial Access |
T1110.003 | Password Spraying | Persistence |
Detection: Okta ThreatInsight Suspected PasswordSpray Attack
DEPRECATED DETECTION
This detection has been marked as deprecated by the Splunk Threat Research team. This means that it will no longer be maintained or supported. If you have any questions or concerns, please reach out to us at research@splunk.com.
Description
DEPRECATION NOTE - This search has been deprecated and replaced with Okta ThreatInsight Threat Detected
. The following analytic utilizes Oktas ThreatInsight to identify "PasswordSpray" and any included secondary outcome reasons. This event will trigger when a brute force attempt occurs with unknown usernames attempted.
Search
1`okta` eventType="security.threat.detected" AND outcome.reason="Password Spray"
2| stats count min(_time) as firstTime max(_time) as lastTime values(displayMessage) by eventType client.userAgent.rawUserAgent client.userAgent.browser outcome.reason
3| `security_content_ctime(firstTime)`
4| `security_content_ctime(lastTime)`
5| `okta_threatinsight_suspected_passwordspray_attack_filter`
Data Source
Name | Platform | Sourcetype | Source | Supported App |
---|---|---|---|---|
N/A | N/A | N/A | N/A | N/A |
Macros Used
Name | Value |
---|---|
okta | eventtype=okta_log OR sourcetype = "OktaIM2:log" |
okta_threatinsight_suspected_passwordspray_attack_filter | search * |
okta_threatinsight_suspected_passwordspray_attack_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
This search is specific to Okta and requires Okta logs to be ingested in your Splunk deployment.
Known False Positives
Fidelity of this is high as it is Okta ThreatInsight. Filter and modify as needed.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
Okta ThreatInsight has detected or prevented a PasswordSpray attack. | 60 | 60 | 100 |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | Not Applicable | N/A | N/A | N/A |
Unit | ❌ Failing | N/A | N/A |
N/A |
Integration | ❌ Failing | N/A | N/A |
N/A |
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: 2