ID | Technique | Tactic |
---|---|---|
T1621 | Multi-Factor Authentication Request Generation | Credential Access |
T1078 | Valid Accounts | Defense Evasion |
T1110 | Brute Force | Initial Access |
Detection: PingID Multiple Failed MFA Requests For User
Description
The following analytic identifies multiple failed multi-factor authentication (MFA) requests for a single user within a PingID environment. It triggers when 10 or more MFA prompts fail within 10 minutes, using JSON logs from PingID. This activity is significant as it may indicate an adversary attempting to bypass MFA by bombarding the user with repeated authentication requests. If confirmed malicious, this could lead to unauthorized access, as the user might eventually accept the fraudulent request, compromising the security of the account and potentially the entire network.
Search
1`pingid` "result.status" IN ("FAILURE,authFail","UNSUCCESSFUL_ATTEMPT")
2| eval time = _time, src = coalesce('resources{}.ipaddress','resources{}.devicemodel'), user = upper('actors{}.name'), object = 'resources{}.devicemodel', reason = 'result.message'
3| bucket span=10m _time
4| stats dc(_raw) AS mfa_prompts min(time) as firstTime, max(time) as lastTime values(src) as src by user, reason, _time
5| `security_content_ctime(firstTime)`
6| `security_content_ctime(lastTime)`
7| where mfa_prompts >= 10
8| `pingid_multiple_failed_mfa_requests_for_user_filter`
Data Source
Name | Platform | Sourcetype | Source | Supported App |
---|---|---|---|---|
PingID | N/A | 'XmlWinEventLog' |
'XmlWinEventLog:Security' |
N/A |
Macros Used
Name | Value |
---|---|
pingid | source=PINGID |
pingid_multiple_failed_mfa_requests_for_user_filter | search * |
pingid_multiple_failed_mfa_requests_for_user_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
Target environment must ingest JSON logging from a PingID(PingOne) enterprise environment, either via Webhook or Push Subscription.
Known False Positives
False positives may be generated by normal provisioning workflows for user device registration.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
Multiple Failed MFA requests $mfa_prompts$ for user $user$ between $firstTime$ and $lastTime$. | 50 | 100 | 50 |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | PINGID |
_json |
Integration | ✅ Passing | Dataset | PINGID |
_json |
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