ID | Technique | Tactic |
---|---|---|
T1190 | Exploit Public-Facing Application | Initial Access |
Detection: Ivanti VTM New Account Creation
Description
This analytic detects potential exploitation of the Ivanti Virtual Traffic Manager (vTM) authentication bypass vulnerability (CVE-2024-7593) to create new administrator accounts. The vulnerability allows unauthenticated remote attackers to bypass authentication on the admin panel and create new admin users. This detection looks for suspicious new account creation events in the Ivanti vTM audit logs that lack expected authentication details, which may indicate exploitation attempts.
Search
1`ivanti_vtm_audit` OPERATION="adduser" MODGROUP="admin" IP="!!ABSENT!!"
2| stats count min(_time) as firstTime max(_time) as lastTime by IP, MODUSER, OPERATION, MODGROUP, AUTH
3| `security_content_ctime(firstTime)`
4| `security_content_ctime(lastTime)`
5| `ivanti_vtm_new_account_creation_filter`
Data Source
Name | Platform | Sourcetype | Source |
---|---|---|---|
Ivanti VTM Audit | N/A | 'ivanti_vtm_audit' |
'ivanti_vtm' |
Macros Used
Name | Value |
---|---|
ivanti_vtm_audit | sourcetype=ivanti_vtm_audit |
ivanti_vtm_new_account_creation_filter | search * |
ivanti_vtm_new_account_creation_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
To implement this detection, ensure that Ivanti vTM audit logs are being ingested into Splunk. Configure the Ivanti vTM to send its audit logs to Splunk via syslog or by monitoring the log files directly. The sourcetype should be set to "ivanti_vtm_audit" or a similar custom sourcetype for these logs.
Known False Positives
Legitimate new account creation by authorized administrators will generate similar log entries. However, those should include proper authentication details. Verify any detected events against expected administrative activities and authorized user lists.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
A new administrator account, $MODUSER$, was created on Ivanti vTM device without proper authentication, which may indicate exploitation of CVE-2024-7593. | 72 | 90 | 80 |
References
-
https://www.ivanti.com/security/security-advisories/ivanti-virtual-traffic-manager-vtm-cve-2024-7593
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | ivanti_vtm |
ivanti_vtm_audit |
Integration | ✅ Passing | Dataset | ivanti_vtm |
ivanti_vtm_audit |
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