RANSOM_HIDDENTEARANONCRACK.A

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It downloads a file from a certain URL then renames it before storing it in the affected system.

It connects to certain websites to send and receive information.

It encrypts files with specific file extensions. It encrypts files found in specific folders. It drops files as ransom note.

Arrival Details

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Ransomware adds the following folders:

• C:\{User Name}\
• C:\{User Name}\Rand123\

It drops the following copies of itself into the affected system:

• C:\{User Name}\Rand123\local.exe

Other System Modifications

This Ransomware deletes the following files:

• %Desktop%\READ_IT.txt.locked

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It changes the desktop wallpaper by modifying the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = "C:\{User Name}\ransom.jpg"

It sets the system's desktop wallpaper to the following image:

Download Routine

This Ransomware downloads files from the following URLs then renames them before storage in the affected system:

• https://{BLOCKED}me123.000webhostapp.com/Ransomware/Ransom.jpg

It saves the files it downloads using the following names:

• C:\{User Name}\ransom.jpg

Other Details

This Ransomware connects to the following URL(s) to check for an Internet connection:

• https://www.google.com

It connects to the following website to send and receive information:

• https://pruebame123.{BLOCKED}hostapp.com/Ransomware/write.php?info={Computer Name}-{User Name} {Encryption Key}

Ransomware Routine

This Ransomware encrypts files with the following extensions:

• .txt
• .jar
• .exe
• .dat
• .contact
• .settings
• .doc
• .docx
• .xls
• .xlsx
• .ppt
• .pptx
• .odt
• .jpg
• .png
• .csv
• .py
• .sql
• .mdb
• .sln
• .php
• .asp
• .aspx
• .html
• .htm
• .xml
• .psd
• .pdf
• .dll
• .c
• .cs
• .mp3
• .mp4
• .zip
• .rar
• .mov
• .rtf
• .bmp
• .mkv
• .avi
• .apk
• .lnk
• .iso
• .7-zip
• .ace
• .arj
• .bz2
• .cab
• .gzip
• .lzh
• .tar
• .uue
• .xz
• .z
• .001
• .mpeg
• .mp3
• .mpg
• .core
• .crproj
• .pdb
• .ico
• .pas
• .db
• .torrent
• .rar

It encrypts files found in the following folders:

• %Desktop%
• %User Profile%\Links
• %User Profile%\Contacts
• %User Profile%\Desktop
• %User Profile%\Documents
• %User Profile%\Downloads
• %User Profile%\Pictures
• %User Profile%\Music
• %User Profile%\OneDrive
• %User Profile%\Saved Games
• %User Profile%\Favorites
• %User Profile%\Searches
• %User Profile%\Videos

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It appends the following extension to the file name of the encrypted files:

• .crack

It drops the following file(s) as ransom note:

• %Desktop%\PAGO.txt

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It leaves text files that serve as ransom notes containing the following text:

• Tu computador ha sido hackeado y encriptado by ANONCRACK ...!
  
  ¿COMO RECUPERAR TUS ARCHIVOS?
  
  1. Realiza el pago de 30 USD ha esta direccion bitcoin :
  1CvWhugm6QbHisVvhyRuKn81kQgVVs4ov8
  2. Envia una captura del pago y nombre de tu PC ha este correo: {BLOCKED}ack@protonmail.com
  3. Una vez verificado tu pago, te enviaremos la KEY de DESENCRIPTACION
  4. Disfruta de tus archivos personales
  
  Tus amigos ANONCRACK ;)