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Trojan.MonsterInstall.3

Aggiunto al database dei virus Dr.Web: 2019-03-29

La descrizione è stata aggiunta:

SHA1:

  • cf20c882dcc427bff822fa2c54fab39397a8d6e7 (codeX)
  • 873ba485d40199ab7f7ebe1258aa56e09625f3af (codeX, decrypted)
  • 0f5d2fe52f15adb6813bd398dcc1e10de52e2953 (main.js)

Description

A module of the MonsterInstall trojan. It’s downloaded as a 0-0-3-0-worker.7z archive by the Trojan.MonsterInstall.2 component.

The contents of the archive:

  • node_modules,
  • 7za.exe,
  • codeX,
  • main.js,
  • sysnode.exe (executable Node.js file).

Operating routine

main.js reads the codeX file, decrypts it using XOR with a string “xor” and executes it.

The codeX file creates the MoonTitleWorker mutual exclusion, then forms a json with information about the system and the trojan:

{"userId": id, "starter": [], "worker": [], "source": [], "osInfo": {"isX64": True, "osString": "Windows 7 Enterprise"}}

Afterwards it sends the information to the http://xyi-sosi-guboi-trisi[.]xyz:1001/getApps server via POST request. Response from the server may contain information about the apps that must be installed. An example of the server response:


{
    "body": {
        "apps": [{
            "hash": "452f8e156c5c3206b46ea0fe61a47b247251f24d60bdba31c41298cd5e8eba9a",
            "size": 8137466,
            "version": [2, 0, 0, 2],
            "link": "xmr-1-64.7z",
            "path": "%pf%\Microsoft JDX\64",
            "runComand": "%path%\moonlight.exe start.js",
            "name": "xmr64"
        }]
    },
    "head": "O~¨^Óå+ßzIçsG¬©®üS„ʶ$êL–LùθZ\f\u0019ÐÐ\u000e\u0004\u001cÀU¯\u0011š)áUÚ\u001flß²A\u001fôÝÔ숱y%\"DP»^¯«FUâ\u001cÔû\u001dµ´Jï#¬ÌȹÎÚª?\r—]Yj·÷õ³—\u001e°ÖÒ\\鉤d’BT\u0019·¦FõVQ°Aç’)\u001cõªµ¦ýûHlb͸þ}éŒ\u0000jvÔ%S;Ã×þA\u0011ß‘I[´\u0004ýÚ\u0007Z:ZÂ\n–ñz#ÈBö›²2\u0007ήJw±è®TVoŸå\bÖR3½ù;ƒó\u0011É̀ÅÖàð06ÓeÕþ­ˆ”7Ùš\u0011•»”˜¢5µgôÛc˜®&L\u000fê.?!Çæ}¨\u001eÕ—J#A¼_Ì\u0015càñb"
}

The trojan downloads versions of the app that are not on the device. To do this, it sends a POST request with the same information that was in the last request, but to a different URL: http://xyi-sosi-guboi-trisi[.]xyz:1001/<link>, where <link> is a “link” parameter for a corresponding application from the server’s response.

The trojan checks if the size and hash of the downloaded file fits the information from the “hash” and “size” parameters sent by the server. If the description matches, the trojan moves the file to a path from the “path” parameter and executes a command from the "runCommand” field. Information about the downloaded app is saved in the registry: [HKLM\SOFTWARE\Microsoft\MoonTitle\apps\].

If a running older version of the app is still running, the trojan deletes it and installs as described earlier.

Depending on the system version, the server responds with an xmr-1.7z or xmr-1-64.7z archive (Trojan.MonsterInstall.4).

News about the Trojan

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Download Dr.Web

Download by serial number

Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android