• Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes


Infection Channel:

Downloaded from the Internet, Dropped by other malware

This ransomware encrypts all drives except the CD-ROM.

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.


File Size:

282,624 bytes

File Type:


Memory Resident:



Encrypts files, Modifies system registry, Displays message/message boxes

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.


This Ransomware drops the following files:

  • %User Temp%\img{3 Random Characters}.tmp

(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:

  • %System%\cmd.exe" /c PING -n 5 > NUL && del "{Malware Full Path}" → deletes itself

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Ransomware changes the desktop wallpaper by modifying the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\img{3 Random Characters}.tmp

Process Termination

This Ransomware terminates the following services if found on the affected system:

  • vss
  • sql
  • svc$
  • memtas
  • mepocs
  • sophos
  • veeam
  • backup
  • GxVss
  • GxBlr
  • GxFWD
  • GxCVD
  • GxCIMgr
  • DefWatch
  • ccEvtMgr
  • ccSetMgr
  • SavRoam
  • RTVscan
  • QBFCService
  • QBIDPService
  • Intuit
  • QuickBooks
  • FCS
  • QBCFMonitorService
  • YooBackup
  • YooIT
  • zhudongfangyu
  • stc_raw_agent
  • VeeamTransportSvc
  • VeeamDeploymentService
  • VeeamNFSSvc
  • PDVFSService
  • BackupExecVSSProvider
  • BackupExecAgentAccelerator
  • BackupExecAgentBrowser
  • BackupExecDiveciMediaService
  • BackupExecJobEngine
  • BackupExecManagementService
  • BackupExecRPCService
  • AcrSch2Svc
  • AcronisAgent
  • CASAD2DWebSvc
  • CAARCUpdateSvc

It terminates the following processes if found running in the affected system's memory:

  • sql.exe
  • oracle.exe
  • ocssd.exe.
  • dbsnmp.exe
  • synctime.exe
  • agntsvc.exe
  • isqlplussvc.exe
  • xfssvccon.exe
  • mydesktopservice.exe
  • ocautoupds.exe
  • encsvc.exe
  • firefox.exe
  • tbirdconfig.exe
  • mydesktopqos.exe
  • ocomm.exe
  • dbeng50.exe
  • sqbcoreservice.exe
  • excel.exe
  • infopath.exe
  • msaccess.exe
  • mspub.exe
  • onenote.exe
  • outlook.exe
  • powerpnt.exe
  • steam.exe
  • thebat.exe
  • thunderbird.exe
  • visio.exe
  • winword.exe
  • wordpad.exe
  • notepad.exe

Other Details

This Ransomware does the following:

  • It encrypts all available drives except CDROM
  • It does not encrypt files with filesize below 512 Bytes
  • It can only encrypt up to 8000 bytes of content only
  • Empties Recycle Bin
  • If not executed with admins rights, it will relaunch itself as admin using this command:
    • %System%\cmd.exe /c ECHO “You must restart the program to resolve a critical error” && start”” ” %System Root%\{Malware Full path}.exe”
  • Clear event logs for the following:
    • System
    • Application
    • Security

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It accepts the following parameters:

  • -debug: Display debug information

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file path:

  • windows
  • appdata
  • application data
  • boot
  • google
  • mozilla
  • program files
  • program files (x86)
  • program data
  • system volume information
  • tor browser
  • windows.old
  • intel
  • msocache
  • perflogs
  • x64dbg
  • public
  • all users
  • default

It drops the following file(s) as ransom note:

  • {Encrypted Directory}\How To Restore Your Files.txt


Minimum Scan Engine:





24 Apr 2023




25 Apr 2023

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:

    • Troj.Win32.TRX.XXPE50FFF067

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

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\img{3 Random Characters.tmp}
  • {Encrypted directory}\How To Restore Your Files.txt

Step 5

Reset your Desktop properties

[ Learn More ]

Step 6

Restore encrypted files from backup.

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win32.RTMCOMMAND.THKBFBD. 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.

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