In the root folder of SuiteCRM there is a file called config.php
If you look at this file yo will find the necessary information to connect to the database.
Then write a php script to execute the query provided by @AlxGr and you are done.
First look for a similar section in config.php:
'dbconfig' =>
array (
'db_host_name' => 'yourdbhost',
'db_user_name' => 'yourdbuser',
'db_password' => 'yourdbpwd',
'db_name' => 'yourdbname',
'db_type' => 'mysql',
),
You can try this:
<?php
$dbhost = "yourdbhost"; // replace yourdbhost with the value found in config.php
$dbuser = "yourdbuser"; // replace yourdbuserwith the value found in config.php
$dbpwd ="yourdbpwd"; // replace yourdbpwdwith the value found in config.php
$dbname = "yourdbname"; // replace yourdbnamewith the value found in config.php
$mysqli = new mysqli($dbhost, $dbuser, $dbpwd, $dbname);
$result = $mysqli->query("UPDATE users SET user_hash = '$2y$10$ua6PicOvqyYMKgOR6gzFcub.Z5s40j6moWRH4oaO.Ef667lz.nb0m' WHERE user_name = 'YourUserNameHere';"); // you must edit also YourUserNameHere and put your actual username (like admin, for example)
?>