Possible Targeted Kerberoasting via servicePrincipalName Modification

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1558.003Kerberoasting
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects addition of a servicePrincipalName value to a user account object. Adversaries with write access set an SPN on a target account to make it kerberoastable, then request a service ticket to crack the account password offline.

Reporting behind it

Related detections9 linkedT1558.003 — drag to rearrange

Malicious Kerberos Ticket File Creation Indicating Credential Theft (via file_event)

Suspicious Kerberoasting via setspn Service Principal Query

Masquerading Kerberos Ticket Abuse via Rubeus (via process_creation)

Suspicious SQL Service Principal Name Enumeration via Setspn

Windows: Suspicious Kerberos Ticket Requests from PowerShell Using KerberosRequestorSecurityToken

Windows Process Creation: RemoteKrbRelay Kerberos Relay Tool Execution

Windows Kerberos KDC Key Distribution Failure: No Suitable Encryption Key or Unsupported EType

Rubeus HackTool Execution via PowerShell ScriptBlock Flags (Windows)

Windows Process Creation: KrbRelay.exe Kerberos Relay Tool Execution

Possible Targeted Kerberoasting via servicePrincipalName Modification

Pivot detection · T1558.003 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →