关于Windows系统Audit Failure报错是否为暴力破解攻击的咨询

Hey there! Let's unpack your question about those Audit Failure errors in the Windows Security log.

First off: Audit Failure events can absolutely be a sign of brute-force attempts, but they don’t always mean that—it depends on the details in the logs. Here’s how to tell:

• Start by checking the Event ID: The most relevant one here is Event ID 4625 (failed logon). If you’re seeing a flood of these, especially with either repeated attempts from the same IP address or a bunch of different usernames being tried, that’s a strong indicator someone’s trying to brute-force their way in.
• Look at the Logon Type: For example, Logon Type 3 (network logon) usually means a remote attempt (like via RDP, SMB, etc.). A surge of these failures is way more concerning than, say, Logon Type 2 (interactive local logon), which might just be someone typing their password wrong locally.
• Rule out innocent causes first: Sometimes these errors come from misconfigured system services, scheduled tasks, or apps that are using an expired or incorrect password to authenticate. If the failures are tied to a specific service account and not random usernames/IPs, that’s probably not a brute-force attack.

If you suspect it is a brute-force attempt, here are quick steps to harden your system:

• Disable any remote access services you don’t actually use (like RDP if you never connect remotely)
• Rename your default administrator account—attackers target "Administrator" by default
• Enable Account Lockout Policy (you can set this in Local Security Policy: lock accounts after 5 failed attempts for 15 minutes, for example)
• Use a long, complex password or passphrase, and enable multi-factor authentication (MFA) if your setup supports it
• Check your firewall rules to restrict remote access only to trusted IPs if possible

If it turns out to be a system/app issue, track down the service or task using the problematic account and update its credentials to fix the repeated failures.

备注：内容来源于stack exchange，提问作者Mohammad Taherian