NTLMv1 Logon Between Client and Server
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About the rule
Rule Type
Standard
Rule Description
Detects the reporting of NTLMv1 being used between a client and server. NTLMv1 is insecure as the underlying encryption algorithms can be brute-forced by modern hardware.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "NTLM Authentication" AND SOURCE = "LsaSrv" select Action1.HOSTNAME,Action1.MESSAGE
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Tim Shelton, Nasreddine Bencherchali (Nextron Systems)
