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VBS.DownLoader.2822

Aggiunto al database dei virus Dr.Web: 2024-12-28

La descrizione è stata aggiunta:

SHA1:

  • c0895d0123a92f56db2940df44042e102b77e47d

Description

Malicious VBScript application for Windows that acts as a backdoor.

Operating routine

Downloads and executes https://asobimo[.]link/ubr.txt (6d8716cddc3ca6c8558eb4f842d81638f00f01f8), which is a PowerShell script, that prepares the system for the installation of the Trojan.BtcMine.2742 miner.

Sends a POST request to http://microduck3.duckdns[.]org:408.

Receives the following commands in response:

Command Description
exc Launch script from [argument 1]
Sc Write [argument 1] to %TEMP%/[argument 2] and launch it in minimized window
Rf Write [argument 1] to %TEMP%/ [argument 2] and launch it in hidden window
Ren Overwrite the current version of the script with [argument 1]
Up Launch payload from server using wscript.exe
Un Launch a script from the server with arguments containing the full path to this script and file name
Cl Terminate backdoor

Mitre Matrix

Stage Tactic
Execution

Command and Scripting Interpreter (T1059)

Visual Basic (T1059.005)

Command and Control

Application Layer Protocol (T1071)

Web Protocols (T1071.001)

DNS (T1071.004)

Data Obfuscation (T1001)

Protocol or Service Impersonation (T1001.003)

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