RANSOM_FOXY.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 is capable of encrypting files in the affected system.

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 and executes the following files:

• %User Temp%\WindowsSoundDriver.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on 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.)

Other Details

This Ransomware encrypts files with the following extensions:

• .txt
• .doc
• .docx
• .xls
• .xlsx
• .ppt
• .pptx
• .odt
• .jpg
• .png
• .csv
• .sql
• .mdb
• .sln
• .php
• .asp
• .aspx
• .html
• .xml
• .psd
• .mp3
• .dll
• .cat
• .inf
• .exe
• .dat
• .wav
• .wma
• .m4a
• .avi
• .avi
• .mov
• .wmv
• .flv
• .gif
• .mpg
• .mp4
• .jar
• .java
• .sav
• .ico
• .torrent

It drops the following file(s)/component(s):

• %User Profile%\Documents\decrpt.openwithnotepad - contains the 15 random-generated characters decryption key
• %AppDataLocal%\GDIPFONTCACHEV1.DAT - font cache

(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.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on 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 is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware encrypts files found in the following folders:

• %Application Data%\
• %Program Files%\
• %Desktop%\
• My Music Folder
• My Computer Folder
• Personal folder - The directory that serves as a common repository for documents.

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on 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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %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 appends the following extension to the file name of the encrypted files:

• nightmare

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

• %Desktop%\READ_ME_IMPORTANT.txt
  

NOTES:

This ransomware displays the following as its ransom note:

The decryption key can be found in %User Profile%\Documents\decrpt.openwithnotepad.

Open it on Notepad and copy-paste the key to the window provided in order to decrypt your files.

It also displays the window below:

The window will close when the decryption process is finished.