Okay, I'll admit it—I came into this thinking CyberArk was *just* about vaulting credentials and managing sessions. But after our last security drill (a simulated breach, thankfully!), I had to dive deep into its forensic capabilities, specifically around isolating a compromised local account. The process was… enlightening, and honestly, a bit more granular than I expected.
Here’s the step-by-step I followed, pieced together from the console logs, a bunch of trial and error, and a very patient security architect on our team. The scenario: an alert triggered for unusual after-hours activity from a local admin account on a critical server.
**First, confirming the compromise wasn't just a false positive:**
* I started in the **Privileged Threat Analytics** dashboard. The alert was based on a "geographically impossible login" rule—the account was used from two locations within an hour.
* Drilled into the **Session Details** for both suspicious logins. CyberArk logs the entire session, so I could see the exact commands run (a bunch of `net user` queries and attempts to enable a hidden account). This was the smoking gun.
* **Key takeaway:** The session playback feature is your best friend here. It moves this from "maybe weird" to "definitely malicious."
**Isolating the account to prevent lateral movement:**
This is where it gets tactical. You can't just delete the account—it might break something, and you need to preserve evidence. Here’s the isolation playbook we used:
1. **Immediate session termination:** From the active sessions monitor, I terminated the ongoing session (the attacker was still connected!). This is a one-click kill switch.
2. **Password vaulting & rotation:** Since it was a local account, I added it to a safe with a "change immediately" policy. CyberArk instantly rotated the password to a 64-character complex one, invalidating the attacker's access.
3. **Restricting use:** We adjusted the platform policy for that server to **temporarily deny all logins** for that specific local account, even with the correct new password. This is a policy-level "disable" without touching the server itself.
4. **Leveraging the PAM Passer:** For any services or tasks using that account, we switched them to use the PAM Passer to retrieve credentials, so functionality remained but every retrieval was logged and the password was changed after use.
**The forensic deep dive for our report:**
* I pulled the **full audit trail** for the account, which showed every password retrieval, session start, and file access via PSM for the last 90 days. We could see the compromise originated from a jump box we thought was clean.
* Used the **Risk Analytics** module to correlate this event with other anomalies (e.g., failed logins on other servers using similar patterns around the same time).
* Exported all session recordings and command logs for the incident response team. The ability to export a tidy, searchable log was clutch.
**Pitfalls & things I wish I knew:**
* The isolation is only as good as your CyberArk coverage. If the local account exists on servers not onboarded, you're blind.
* Policy changes take a minute or two to propagate. In a real incident, communicate that delay to the IR team.
* The forensic data is rich, but the UI for cross-account correlation isn't as intuitive as a dedicated SIEM. We ended up pushing logs to Splunk for the broader timeline.
Overall, I was impressed by the depth of control. It's not just "detect and reset"; it's a full containment workflow within the PAM framework. The move from "alert" to "isolated" took us about 15 minutes once I knew the path.
Has anyone else run through a similar drill? I'm particularly curious if you've automated the isolation steps via the APIs or if you have a different workflow for domain vs. local accounts.
🔥
Try everything, keep what works.