title: SQL Injection Strings
id: 5513deaf-f49a-46c2-a6c8-3f111b5cb453
status: test
description: Detects SQL Injection attempts via GET requests in access logs
references:
    - https://www.acunetix.com/blog/articles/exploiting-sql-injection-example/
    - https://www.acunetix.com/blog/articles/using-logs-to-investigate-a-web-application-attack/
    - https://brightsec.com/blog/sql-injection-payloads/
    - https://github.com/payloadbox/sql-injection-payload-list
author: Saw Win Naung, Nasreddine Bencherchali
date: 2020/02/22
modified: 2022/07/25
logsource:
    category: webserver
detection:
    select_method:
        cs-method: 'GET'
    keywords:
        - '=select '
        - '=select%20'
        - '=select('
        - 'UNION SELECT'
        - 'UNION%20SELECT'
        - 'UNION ALL SELECT'
        - 'UNION%20ALL%20SELECT'
        - 'CONCAT(0x'
        - 'order by '
        - 'order%20by%20'
        - 'information_schema.tables'
        - 'group_concat('
        - 'table_schema'
        - 'select%28sleep%2810%29'
        - '@@version'
        - "'1'='1"
        - '%271%27%3D%271'
        - 'SELECTCHAR('
        - 'select * '
        - 'select%20*%20'
        - 'or 1=1#'
        - 'or%201=1#'
    filter:
        sc-status: 404
    condition: select_method and keywords and not 1 of filter*
fields:
    - client_ip
    - vhost
    - url
    - response
falsepositives:
    - Java scripts and CSS Files
    - User searches in search boxes of the respective website
    - Internal vulnerability scanners can cause some serious FPs when used, if you experience a lot of FPs due to this think of adding more filters such as "User Agent" strings and more response codes
level: high