Enterprise password vaults (CyberArk, SecretServer, etc) can be useful but when they store privileged AD credentials, the security of that system needs to be protected like a DC.
adsecurity.org/wp-content/upl…
adsecurity.org/?p=2362
Even brief access to a privileged credential can result in full AD compromise.
adsecurity.org/?p=1929
1. Reduce accounts with AD admin rights
2. Restrict where privileged accounts use credentials
3. Limit systems & accounts with the ability to install/run code on admin systems, DCs, pw vaults, etc
4. Restrict network comms to admin systems incl. password vaults