Suspicious Rubeus Kerberos Abuse Tool Execution from Downloads

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1558Steal or Forge Kerberos Tickets
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects execution of the Rubeus Kerberos abuse tool from a user Downloads folder, as observed in the DynoWiper intrusion for ticket theft and forging. Rubeus is an offensive credential-access utility, and its presence under Downloads on an endpoint indicates hands-on-keyboard Active Directory attack activity.

Reporting behind it

Related detections9 linkedT1558 — drag to rearrange

Malicious Kerberos proxiable/S4U2self Ticket - CVE-2021-42278/42287 (via security)

Malicious Rubeus Kerberos Unconstrained Delegation Abuse (via security)

Malicious Rubeus Kerberos Constrained Delegation Abuse - S4U2Proxy (via security)

Renamed Mimikatz Credential Theft Command Indicators (via process_creation)

Windows PowerShell ScriptBlock: Get-ADComputer reconnaissance for unconstrained delegation properties

Windows Kerberos Replay Attack Likely Activity on Domain Controllers (Event ID 4649)

Windows HackTool Activity: Mimikatz Kerberos Ticket and MemSSP File Creation

Windows: Uncommon Outbound Kerberos Traffic on Port 88

Antivirus Credential Dumping Signature Match (Password Dumpers/Stealers)

Suspicious Rubeus Kerberos Abuse Tool Execution from Downloads

Pivot detection · T1558 · 9 related

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