Ransom.Win32.CRYSIS.NDO
Ransom:Win32/Wadhrama.C (Microsoft), Trojan-Ransom.Win32.Crusis.to (Kaspersky)
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 drops files as ransom note.
TECHNICAL DETAILS
94,720 bytes
EXE
Yes
02 Feb 2019
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 copies of itself into the affected system:
- %System%\{Malware Filename}.exe
- %User Startup%\{Malware Filename}.exe
- %Start Menu%\Programs\Startup\{Malware Filename}.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows XP, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, and 8.)
It adds the following processes:
- /c mode con cp select=1251
- /c vssadmin delete shadows /all /quiet
Ransomware Routine
This Ransomware appends the following extension to the file name of the encrypted files:
- .[dr{BLOCKED}888@mail.fr].888
It drops the following file(s) as ransom note:
- %Desktop%\FILES ENCRYPTED.txt
- %Public%\Desktop\FILES ENCRYPTED.txt
- {Drive Letter}:\FILES ENCRYPTED.txt
- %User Startup%\Info.hta
- %Start Menu%\Programs\Startup\Info.hta
- %System%\Info.hta
- %Application Data%\Info.hta
(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista, 7, and 8.. %Public% is the folder that serves as a repository of files or folders common to all users, which is usually C:\Users\Public in Windows Vista, 7, and 8.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows XP, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.. %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.)
SOLUTION
9.850
14.790.07
03 Feb 2019
14.791.00
04 Feb 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
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.
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- {Malware Filename}.exe = "%System%\{Malware Filename}.exe"
- {Malware Filename}.exe = "%System%\{Malware Filename}.exe"
Step 4
Search and delete these files
- %Desktop%\FILES ENCRYPTED.txt
- %Public%\Desktop\FILES ENCRYPTED.txt
- {Drive Letter}:\FILES ENCRYPTED.txt
- %User Startup%\Info.hta
- %Start Menu%\Programs\Startup\Info.hta
- %System%\Info.hta
- %Application Data%\Info.hta
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.CRYSIS.NDO. 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:
Step 6
Restore encrypted files from backup.
NOTES:
Enabling Volume Shadow Service
1. Run the command prompt (cmd.exe) as administrator.
2. Enable Volume Shadow Service by typing the following command: net start vss
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