Malicious Brutforce Enumeration on Windows OpenSSH Server with Non Existing User (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-09-02
- Updated
- 2026-09-02
ATT&CK techniques
Cred AccessRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects sSH brutforce a Windows OpenSSH server with non existing users.
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1110/
- winaero.comhttps://winaero.com/enable-openssh-server-windows-10/
- docs.microsoft.comhttps://docs.microsoft.com/en-us/windows-server/administration/openssh/openssh_install_firstuse
- virtualizationreview.comhttps://virtualizationreview.com/articles/2020/05/21/ssh-server-on-windows-10.aspx
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4625
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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