Ransom.JS.GANDCRAB.MUVEA
Trojan:Win32/Zpevdo.B (Microsoft); JS.Downloader (Symantec)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 drops files as ransom note.
TECHNICAL DETAILS
1,337,367 bytes
JS
No
03 Dec 2018
Connects to URLs/IPs
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:
- %Application Data%\mkltkpfcp.log
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)
It adds the following processes:
- powershell.exe -ExecutionPolicy Bypass -Command "IEX (([System.IO.File]::ReadAllText('%Application Data%\mkltkpfcp.log')).Replace('#',''));Start-Sleep -s 1000000;"
- "%System%\wbem\wmic.exe" shadowcopy delete
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Autostart Technique
This Ransomware adds the following lines or registry entries as part of its routine:
- HKEY_LOCAL_MACHINE\SOFTWARE\ex_data\data
- HKEY_LOCAL_MACHINE\SOFTWARE\keys_data\data
Other System Modifications
This Ransomware adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\keys_data\
data
Public = {hex values}
HKEY_LOCAL_MACHINE\SOFTWARE\keys_data\
data
Private = {hex values}
HKEY_LOCAL_MACHINE\SOFTWARE\ex_data\
data
ext = {hex values}
It modifies the following registry keys:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\pidor.bmp
Other Details
This Ransomware connects to the following possibly malicious URL:
- http://www.{BLOCKED}rsport.biz
- http://www.{BLOCKED}nau.biz
- http://www.{BLOCKED}m.com
Ransomware Routine
This Ransomware appends the following extension to the file name of the encrypted files:
- .unceq
It drops the following file(s) as ransom note:
- %User Temp%\pidor.bmp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
SOLUTION
9.850
14.842.02
28 Feb 2019
14.843.00
01 Mar 2019
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
Identify and terminate files detected as Ransom.JS.GANDCRAB.MUVEA
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Delete this registry value
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.
- HKEY_LOCAL_MACHINE\SOFTWARE\keys_data\data
- HKEY_LOCAL_MACHINE\SOFTWARE\ex_data\data
Step 5
Restore this modified registry value
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.
- In HKEY_CURRENT_USER\Control Panel\Desktop
- From: Wallpaper = "%User Temp%\\pidor.bmp"
To: Wallpaper = "{User Preference}"
- From: Wallpaper = "%User Temp%\\pidor.bmp"
Step 6
Search and delete these files
- %Application Data%\mkltkpfcp.log
- %User Temp%\\pidor.bmp
Step 7
Restore encrypted files from backup.
Step 8
Scan your computer with your Trend Micro product to delete files detected as Ransom.JS.GANDCRAB.MUVEA. 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 the following Trend Micro Support pages for more information:
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