I have many audit failure with event ID 4625 and Logon type 3 in my event log.
Is this problem form my server(internal services or applications) ?
Or this is brute force attack?
Finally How can i find source of this logins and resolve problem?
This is detailed information in General tab:
An account failed to log on.
Subject:
Security ID: NULL SID
Account Name: -
Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: aaman
Account Domain:
Failure Information:
Failure Reason: Unknown user name or bad password.
Status: 0xC000006D
Sub Status: 0xC0000064
Process Information:
Caller Process ID: 0x0
Caller Process Name: -
Network Information:
Workstation Name: test2
Source Network Address: -
Source Port: -
Detailed Authentication Information:
Logon Process: NtLmSsp
Authentication Package: NTLM
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
**And this is detailed information in Detail Tab:**
+ System
- Provider
[ Name] Microsoft-Windows-Security-Auditing
[ Guid] {54849625-5478-4994-A5BA-3E3B0328C30D}
EventID 4625
Version 0
Level 0
Task 12544
Opcode 0
Keywords 0x8010000000000000
- TimeCreated
[ SystemTime] 2015-05-09T06:57:00.043746400Z
EventRecordID 2366430
Correlation
- Execution
[ ProcessID] 696
[ ThreadID] 716
Channel Security
Computer WIN-24E2M40BR7H
Security
- EventData
SubjectUserSid S-1-0-0
SubjectUserName -
SubjectDomainName -
SubjectLogonId 0x0
TargetUserSid S-1-0-0
TargetUserName aaman
TargetDomainName
Status 0xc000006d
FailureReason %%2313
SubStatus 0xc0000064
LogonType 3
LogonProcessName NtLmSsp
AuthenticationPackageName NTLM
WorkstationName test2
TransmittedServices -
LmPackageName -
KeyLength 0
ProcessId 0x0
ProcessName -
IpAddress -
IpPort -
Best Answer
Working solution i found here: https://github.com/DigitalRuby/IPBan
For Windows Server 2008 or equivalent, you should disable NTLM logins and only allow NTLM2 logins. On Windows Server 2008, there is no way to get the ip address of NTLM logins. Use secpol -> local policies -> security options -> network security restrict ntlm incoming ntlm traffic -> deny all accounts.
In RU version: Локальная политика безопасности -> Локальные политики -> Параметры безопасности -> Сетевая безопасность: ограничения NTLM: входящий трафик NTLM -> Запретить все учетные записи