Ransom:Win32/BadRabbit (MICROSOFT); W32/Diskcoder.D!tr.ransom (FORTINET)
Windows
This ransomware, also known as Bad Rabbit, reportedly spread to networks of some high profile companies located in Ukraine and Russia. It spreads via network shares. It also modifies the Master Boot Record (MBR) of an affected system.
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.
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:
(Note: %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %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 drops and executes the following files:
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Other System Modifications
This Ransomware adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
DependOnService = "FltMgr"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
DisplayName = "Windows Client Side Caching DDriver"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
ErrorControl = 3
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
Group = "Filter"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
ImagePath = "cscc.dat"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
Start = 0
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cscc
Type = 1
Information Theft
This Ransomware gathers the following data:
Other Details
This Ransomware does the following:
Ransomware Routine
This Ransomware encrypts files with the following extensions:
It avoids encrypting files with the following strings in their file path:
NOTES:
This ransomware drops the following ransom note named "Readme.txt" which contains the following:
After rebooting the system, it then displays the following:
It displays the following window after clicking DECRYPT.lnk:
It also displays the following after accessing its payment site:
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Restore your system's Master Boot Record (MBR)
To restore your system's Master Boot Record (MBR):
• On Windows 2000, XP, and Server 2003:
• On Windows Vista, 7, and Server 2008:
• On Windows 8, 8.1, and Server 2012:
Step 4
Restart in Safe Mode
Step 5
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
Step 6
Search and delete these files
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_BADRABBIT.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 8
Restore encrypted files from backup.
Step 9
Scan your computer with your Trend Micro product to delete files detected as RANSOM_BADRABBIT.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.