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MediumSigmaHQFlorian Roth (Nextron Systems)

Suspicious Kerberos RC4 Ticket Encryption

Detects service ticket requests using RC4 encryption type

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
windows
Log source service
security

Known benign triggers

  • Service accounts used on legacy systems (e.g. NetApp)
  • Windows Domains with DFL 2003 and legacy systems

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