Ransom_BTCWARE.AI
Gen:Variant.Ransom.BTCWare.34 (Bitdefender), Trojan-Ransom.Win32.Bitcovar.dn (Kaspersky), Ransom:Win32/Betisrypt.D (Microsoft), Ransom.BTCware (Norton)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
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.)