trigger_drop

rule trigger_drop {
    meta:
        description = "Chinese Hacktool Set - file trigger_drop.php"
        license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
        reference = "http://tools.zjqhr.com/"
        date = "2015-06-13"
        hash = "165dd2d82bf87285c8a53ad1ede6d61a90837ba4"
        id = "3b4f32ff-2de2-5689-869a-8a8f55e7fa0c"
    strings:
        $s0 = "$_GET['returnto'] = 'database_properties.php';" fullword ascii
        $s1 = "echo('<meta http-equiv=\"refresh\" content=\"0;url=' . $_GET['returnto'] . '\">'" ascii
        $s2 = "@mssql_query('DROP TRIGGER" ascii
        $s3 = "if(empty($_GET['returnto']))" fullword ascii
    condition:
        filesize < 5KB and all of them
}