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Update sshd-logs.yaml with a new pattern #1105

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Update sshd-logs.yaml with a new pattern #1105

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9 changes: 9 additions & 0 deletions parsers/s01-parse/crowdsecurity/sshd-logs.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ pattern_syntax:
SSHD_PREAUTH_AUTHENTICATING_USER: 'Connection (closed|reset) by (authenticating|invalid) user %{USERNAME:sshd_invalid_user} %{IP_WORKAROUND:sshd_client_ip} port \d+ \[preauth\]'
#following: https://github.com/crowdsecurity/crowdsec/issues/1201 - some scanners behave differently and trigger this one
SSHD_PREAUTH_AUTHENTICATING_USER_ALT: 'Disconnected from (authenticating|invalid) user %{USERNAME:sshd_invalid_user} %{IP_WORKAROUND:sshd_client_ip} port \d+ \[preauth\]'
SSHD_PREAUTH_AUTHENTICATING_IP: 'Connection (closed|reset) by %{IP_WORKAROUND:sshd_client_ip} port \d+ \[preauth\]'
SSHD_BAD_KEY_NEGOTIATION: 'Unable to negotiate with %{IP_WORKAROUND:sshd_client_ip} port \d+: no matching (host key type|key exchange method|MAC) found.'
# in case they are blocked by /etc/ssh/sshd_config AllowUsers xx yy
SSHD_NOT_ALLOWED_USER: 'User %{USERNAME:sshd_invalid_user}? from %{IP_WORKAROUND:sshd_client_ip}( port \d+)? not allowed because not listed in AllowUsers'
Expand Down Expand Up @@ -45,6 +46,14 @@ nodes:
value: ssh_failed-auth
- meta: target_user
expression: "evt.Parsed.sshd_invalid_user"
- grok:
name: "SSHD_PREAUTH_AUTHENTICATING_IP"
apply_on: message
statics:
- meta: log_type
value: ssh_failed-auth
- meta: target_user
expression: "evt.Parsed.sshd_invalid_user"
- grok:
name: "SSHD_DISC_PREAUTH"
apply_on: message
Expand Down