Ransom_BTCWARE.AI

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 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:

• %Application Data%\payday.hta

(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.)

Other System Modifications

This Ransomware adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
payday = %Application Data%\payday.hta

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
baby = %Application Data%\payday.hta

Other Details

This Ransomware is capable of encrypting files in the affected system.

It executes the following command to disable/stop/delete Windows components:

• cmd.exe /c vssadmin.exe Delete Shadows /All /Quiet
• cmd.exe /c bcdedit.exe /set {default} recoveryenabled No
• cmd.exe /c bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures
• vssadmin.exe Delete Shadows /All /Quiet

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

• .[payday@cryptmaster.info]-id-3F8.payday

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

• %System Root%\!! RETURN FILES !!.txt

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)