Ransom.Win64.DAGONLCKR.YXDGFT
Ransom:Win64/QuantumLocker.AA!MTB (MICROSOFT)
Windows
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. 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.
Installation
This Ransomware drops the following files:
- {Malware File Path}\{Malware Name}.exe.log
- {Encrypted directory}\README_TO_DECRYPT.html
- %User Temp%\{8 Random Characters}.bat → deleted after encryption
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following processes:
- cmd /c ""%User Temp%\{8 Random Characters}.bat" "{Malware File Path}\{Malware File Name}""
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Process Termination
This Ransomware terminates the following services if found on the affected system:
- database
- SQL
- msexchange
It terminates the following processes if found running in the affected system's memory:
- msftesql.exe
- sqlbrowser.exe
- sqlwriter.exe
- oracle.exe
- ocssd.exe
- dbsnmp.exe
- synctime.exe
- agntsvc.exe
- isqlplussvc.exe
- xfssvccon.exe
- sqlservr.exe
- encsvc.exe
- ocautoupds.exe
- mydesktopservice.exe
- firefoxconfig.exe
- tbirdconfig.exe
- mydesktopqos.exe
- ocomm.exe
- mysqld.exe
- sqlagent.exe
- mysqld-nt.exe
- mysqld-opt.exe
- dbeng50.exe
- sqbcoreservice.exe
- excel.exe
- infopath.exe
- msaccess.exe
- mspub.exe
- onenote.exe
- outlook.exe
- powerpnt.exe
- sqlservr.exe
- thebat.exe
- steam.exe
- thebat64.exe
- thunderbird.exe
- visio.exe
- winword.exe
- wordpad.exe
- QBW32.exe
- QBW64.exe
- ipython.exe
- wpython.exe
- python.exe
- dumpcap.exe
- procmon.exe
- procmon64.exe
- procexp.exe
- procexp64.exe
Other Details
This Ransomware adds the following registry keys:
HKEY_CURRENT_USER\Software\Classes\
.dagoned
It does the following:
- Encrypt local and network drive
- It deletes itself after encryption
- Displays the ransom note when opening encrypted files
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- autorun.inf
- boot.ini
- bootfont.bin
- bootsect.bak
- bootmgr
- bootmgr.efi
- bootmgfw.efi
- iconcache.db
- desktop.ini
- ntldr
- ntuser.dat
- ntuser.dat.log
- ntuser.ini
- thumbs.db
- .dagoned
- bootmgr
- README_TO_DECRYPT.html
It avoids encrypting files found in the following folders:
- windows
- system volume Information
- $RECYCLE.BIN
- SYSTEM.SAV
- WINNT
- windows.old
- PerfLog
- PerfLogs
- Program Files
- Program Files(x86)
- Boot
- ProgramData\Microsoft
- ProgramData\Packages
- EFI
- WindowsApps
- Microsoft\Windows
- Local\Packages
- Windows Defender
- afterSentDocuments
- microsoft shared
- Google\Chrome
- Mozilla Firefox
- Mozilla\Firefox
- Internet Explorer
- MicrosoftEdge
- Tor Browser
- AppData\Local\Temp
- AppData
- All Users
- Mozilla
It appends the following extension to the file name of the encrypted files:
- .dagoned
It drops the following file(s) as ransom note:
- {Encrypted directory}\README_TO_DECRYPT.html
It avoids encrypting files with the following file extensions:
- exe
- dll
- sys
- msi
- mui
- inf
- cat
- bat
- cmd
- ps1
- vbs
- ttf
- fon
- lnk
- .386
SOLUTION
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- Ransom.Win32.TRX.XXPE50FFF071
Step 2
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 3
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 4
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.
- In HKEY_CURRENT_USER\Software\Classes\.dagoned
Step 5
Search and delete this file
- {Malware File Path}\{Malware Name}.exe.log
- {Encrypted directory}\README_TO_DECRYPT.html
- %User Temp%\{8 Random Characters}.bat
Step 6
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.DAGONLCKR.YXDGFT. 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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