Suspicious Kerberoasting via RC4 Service Ticket Request for MSSQLSvc SPN (via security)

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 Kerberos service ticket (TGS) requests using weak RC4 encryption for MSSQLSvc service principal names, a strong indicator of Kerberoasting activity used to extract crackable service account credential material. Observed in Elastic Security Labs GOAD live malware lab telemetry where adversaries request RC4 tickets to perform offline password cracking of privileged service accounts.

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)

Possible Targeted Kerberoasting via servicePrincipalName Modification

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)

Suspicious Kerberoasting via RC4 Service Ticket Request for MSSQLSvc SPN (via security)

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.

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