Latest revision as of 15:47, 12 August 2020 (edit) Mshinn (Talk | contribs) (Created page with "{{Infobox |header1 = Rule 5710 |label2 = Status |data2 = Active |label3 = Alert Message |data3 = Attempt to login using a non-existent user }} = Description = This rule det...")

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Latest revision as of 15:47, 12 August 2020

Rule 5710
Status	Active
Alert Message	Attempt to login using a non-existent user

Contents 1 Description 1.1 examples 2 Troubleshooting 2.1 False Positives 3 Additional Information 3.1 Similar Rules 3.2 Knowledge Base Articles 3.3 Outside References 3.4 Notes

[edit] Description

This rule detects attempts to log into accounts that do not exist on the system. This may indicate that an attacker is attempting to find default accounts to log into, or is carrying out a brute force attack.

[edit] examples

Rule: 5710 (level 5) -> 'Attempt to login using a non-existent user' Src IP: 123.30.157.239 Src Location: VN / An Giang Aug 11 20:46:20 www sshd[13235]: Invalid user aconnelly from 123.30.157.239

[edit] Troubleshooting

[edit] False Positives

There are no known false positives with this rule. If you believe this is a false positive, please report this to our security team to determine if this is a legitimate case, or if its clever attack on your system. Do not disable this rule.

Instructions to report false positives are detailed on the Reporting False Positives wiki page.  If it is a false positive, we will fix the issue in the rules and get a release out to you promptly.

[edit] Additional Information

[edit] Similar Rules

None.

[edit] Knowledge Base Articles

None.

[edit] Outside References

None.

[edit] Notes

None.