Ransom.Win32.WANNAREN.D
Trojan.GenericKD.66260501 (BITDEFENDER)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
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. It avoids encrypting files with the following file extensions.
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.
Process Termination
This Ransomware terminates the following services if found on the affected system:
- MsDtsServer100
- MsDtsServer130
- MSSQL
- MSSQLFDLauncher
- MSSQLSERVER
- MSSQLServerADHelper100
- MSSQLServerOLAPService
- ReportServer
- Samss
- SQLAgent
- SQLBrowser
- SQLSERVERAGENT
- SQLTELEMETRY
- SQLWriter
- SSISTELEMETRY130
- Storflt
- TMBMServer
- UniFi
- veeamcatalogsvc
- veeamcloudsvc
- veeamdeploysvc
- vmicguestinterface
- vmicheartbeat
- vmickvpexchange
- vmicrdv
- vmicshutdown
- vmictimesync
- vmicvss
It terminates the following processes if found running in the affected system's memory:
- agntsvc.exe
- dbeng50.exe
- dbsnmp.exe
- encsvc.exe
- excel.exe
- fdhost.exe
- fdlauncher.exe
- firefoxconfig.exe
- infopath.exe
- msaccess.exe
- MsDtsSrvr.exe
- msftesql.exe
- msmdsrv.exe
- mspub.exe
- mydesctopservice.exe
- mysql*
- notepad*
- ntdbsmgr.exe
- ocautoupds.exe
- ocomm.exe
- ocssd.exe
- onenote.exe
- oracle*
- outlook.exe
- pg_*
- postgres.exe
- powerpnt.exe
- ReportingServecesService.exe
- ReportingServicesService.exe
- sqbcoreservice.exe
- sql*
- Ssms.exe
- synctime.exe
- tbirdconfig.exe
- thebat.exe
- thebat64.exe
- thunderbird.exe
- UniFi.exe
- veeam*
- visio.exe
- winword.exe
- wordpad.exe
Information Theft
This Ransomware gathers the following data:
- Processor Architecture
- Native System Info
- Number of Processors
- Shadow Copy IDs
Other Details
This Ransomware requires the following additional components to properly run:
- nclauncher.exe → loader, legitimate Network Connect Launcher executable
- version.man→ encrypted binary, detected as Ransom.Win32.WANNAREN.D.enc
- event.man→ encrypted binary, detected as Ransom.Win32.WANNAREN.D.enc
It does the following:
- It checks for the existence of a "CONFIG" file:
- If it exists,
It uses the following settings:- Appended extension to encrypted files: .jstss
- File name of Ransom note: READ ME.TXT
- Ransom note contents: THIS IS TEST DECRYPT
- If it doesn't exists,
It proceeds with its malicious behaviors using the default settings
- If it exists,
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- autorun.inf
- boot.ini
- bootfont.bin
- bootmgfw.efi
- bootmgr
- bootmgr.efi
- bootsect.bak
- desktop.ini
- iconcache.db
- ntldr
- ntuser.dat
- ntuser.dat.log
- ntuser.ini
- n241.helloadmin.txt
It avoids encrypting files found in the following folders:
- #recycle
- $Recycle.Bin
- All Users
- Boot
- Internet Explorer
- Mozilla
- Mozilla Firefox
- Opera
- Opera Software
- Program Files
- Program Files (x86)
- ProgramData
- Tor Browser
- Windows
- Windows.old
- Folders with the following case sensitive strings:
- remove
- delete
- Remove
- Delete
- REMOVE
- DELETE
It appends the following extension to the file name of the encrypted files:
- .scl
It drops the following file(s) as ransom note:
- %Desktop%\n241.helloadmin.txt
- {All Available Drives}\n241.helloadmin.txt
It avoids encrypting files with the following file extensions:
- .exe
- .dll
- .sys
- .bat
- .msi
- .scl
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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
Search and delete these files
- %Desktop%\n241.helloadmin.txt
- %Desktop%\READ ME.TXT
- {All Available Drives}\n241.helloadmin.txt
- {All Available Drives}\READ ME.TXT
Step 4
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.WANNAREN.D. 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 5
Restore encrypted files from backup.
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