80 lines
2.1 KiB
YAML
80 lines
2.1 KiB
YAML
title: Failed Logon From Public IP
|
|
author: NVISO
|
|
date: 2020/05/06
|
|
description: A login from a public IP can indicate a misconfigured firewall or network
|
|
boundary.
|
|
detection:
|
|
SELECTION_1:
|
|
EventID: 4625
|
|
SELECTION_10:
|
|
IpAddress: 172.21.*
|
|
SELECTION_11:
|
|
IpAddress: 172.22.*
|
|
SELECTION_12:
|
|
IpAddress: 172.23.*
|
|
SELECTION_13:
|
|
IpAddress: 172.24.*
|
|
SELECTION_14:
|
|
IpAddress: 172.25.*
|
|
SELECTION_15:
|
|
IpAddress: 172.26.*
|
|
SELECTION_16:
|
|
IpAddress: 172.27.*
|
|
SELECTION_17:
|
|
IpAddress: 172.28.*
|
|
SELECTION_18:
|
|
IpAddress: 172.29.*
|
|
SELECTION_19:
|
|
IpAddress: 172.30.*
|
|
SELECTION_2:
|
|
IpAddress: '*-*'
|
|
SELECTION_20:
|
|
IpAddress: 172.31.*
|
|
SELECTION_21:
|
|
IpAddress: 127.*
|
|
SELECTION_22:
|
|
IpAddress: 169.254.*
|
|
SELECTION_23:
|
|
IpAddress: ::1
|
|
SELECTION_24:
|
|
IpAddress: fe80::*
|
|
SELECTION_25:
|
|
IpAddress: fc00::*
|
|
SELECTION_3:
|
|
IpAddress: 10.*
|
|
SELECTION_4:
|
|
IpAddress: 192.168.*
|
|
SELECTION_5:
|
|
IpAddress: 172.16.*
|
|
SELECTION_6:
|
|
IpAddress: 172.17.*
|
|
SELECTION_7:
|
|
IpAddress: 172.18.*
|
|
SELECTION_8:
|
|
IpAddress: 172.19.*
|
|
SELECTION_9:
|
|
IpAddress: 172.20.*
|
|
condition: (SELECTION_1 and not ((SELECTION_2 or (SELECTION_3 or SELECTION_4
|
|
or SELECTION_5 or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9
|
|
or SELECTION_10 or SELECTION_11 or SELECTION_12 or SELECTION_13 or SELECTION_14
|
|
or SELECTION_15 or SELECTION_16 or SELECTION_17 or SELECTION_18 or SELECTION_19
|
|
or SELECTION_20 or SELECTION_21 or SELECTION_22) or SELECTION_23 or (SELECTION_24
|
|
or SELECTION_25))))
|
|
falsepositives:
|
|
- Legitimate logon attempts over the internet
|
|
- IPv4-to-IPv6 mapped IPs
|
|
id: f88e112a-21aa-44bd-9b01-6ee2a2bbbed1
|
|
level: medium
|
|
logsource:
|
|
product: windows
|
|
service: security
|
|
tags:
|
|
- attack.initial_access
|
|
- attack.persistence
|
|
- attack.t1078
|
|
- attack.t1190
|
|
- attack.t1133
|
|
yml_filename: win_susp_failed_logon_source.yml
|
|
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/builtin
|
|
|