RANSOM_HIDDENTEARSHIVA.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 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 drops the following files:

• %Desktop%\ShivaKEY.txt -> contains computer name, user name, and key

(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 adds the following processes:

• cmdd.exe /C timeout 2 && Del /Q /F {malware path}\{malware name}

Other Details

This Ransomware does the following:

• It will try to delete itself after execution but it contains the error of using "cmdd.exe" instead of "cmd.exe"
• It also contains the following URL which was not used by its functions:
  
  • http://thanhlong.{BLOCKED}e.com.vn/mediacenter/hk2.php?info=

Ransomware Routine

This Ransomware encrypts files with the following extensions:

• .hk

It encrypts files found in the following folders:

• %User Profile%
• {All drives except C:\}

(Note: %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 avoids encrypting files with the following strings in their file path:

• Windows
• Program Files
• Program Files (x86)

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

• .{6 random characters}

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

• {Folders containing encrypted files}\hk.html