PUA.Win32.ByteFence.D

June 05, 2020

PLATFORM:

Windows

OVERALL RISK RATING:

REPORTED INFECTION:

SYSTEM IMPACT RATING:

INFORMATION EXPOSURE:

Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

TECHNICAL DETAILS

File Size:

14,001,208 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

05 Jun 2020

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application adds the following processes:

"%User Temp%\InstallTools.exe" "{malware file path and name}" Software\ByteFence INSNDE "{malware file path and name}" /mode=s /url=logs.bytefence.com/event /product=Bytefence
"%User Temp%\bytefence-installer-5.5.0.7.exe" /LM=3 /INSTEX /cd=12345 /thankyou /IGNORE="{malware file path and name}"
"%User Temp%\InstallTools.exe" "{malware file path and name}" Software\ByteFence INSNDE "{malware file path and name}" /mode=f /url=logs.bytefence.com/event /product=Bytefence
taskkill /f /im ByteFence.exe
taskkill /f /im ByteFenceService.exe
taskkill /f /im ByteFenceScan.exe
taskkill /f /im rsEngineHelper.exe
taskkill /f /im rsLggr.exe
"%System Root%\Program Files\ByteFence\ByteFenceService.exe" -i
"%System Root%\Program Files\ByteFence\ByteFence.exe" /service
"%System Root%\Program Files\ByteFence\ByteFence.exe"
"%System Root%\Program Files\ByteFence\ByteFenceService.exe"

It creates the following folders:

%System Root%\Program Files\ByteFence
%System Root%\Program Files\ByteFence\amd64
%System Root%\Program Files\ByteFence\x64
%System Root%\Program Files\ByteFence\x86
%System Root%\program files\bytefence\Logs

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

Autostart Technique

This Potentially Unwanted Application registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
ImagePath = "%System Root%\Program Files\ByteFence\ByteFenceService.exe"

Other System Modifications

This Potentially Unwanted Application modifies the following file(s):

%System Root%\Program Files\ByteFence\Logs\err.dat

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

It deletes the following folders:

%User Temp%\nsa626B.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 registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
INSNDE = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
NDLAFLT = ""

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
NDLCHAN = ""

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
AFLTCREATED = "1589315104"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayName = "ByteFence Anti-Malware"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
UninstallString = "%System Root%\Program Files\ByteFence\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
Publisher = "Byte Technologies LLC"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
InstallSource = "%System Root%\Program Files\ByteFence"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayVersion = "5.5.0.7"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayIcon = "%System Root%\Program Files\ByteFence\Uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
URLInfoAbout = "https://www.{BLOCKED}nce.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
INSTUID = "{{GUID}}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
MOLOG = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
INSTUID = "{{GUID}}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
MOLOG = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\eventlog\Application
AutoBackupLogFiles = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
ByteFenceService
EventMessageFile = "%Windows%\Microsoft.NET\Framework64\v2.0.50727\EventLogMessages.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
FirstRun = "2/6/2020 6:58:02 AM"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
FirstRun = "2/6/2020 6:58:02 AM"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
U = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
U = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
EVNLSA = "637165724672027195"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
SAASCC = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
LMBLD = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
LMBLD = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
LMBLDH = "60ta4/FetA8mEhIuZN8s6Q=="

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
LMBLDH = "60ta4/FetA8mEhIuZN8s6Q=="

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
EINSTEX = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
EINSTEX = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
IPCD = "12345"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
IPCD = "12345"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
ETYBLD = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
ETYBLD = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
OINSTP = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
OINSTP = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
EVLSRC = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
EVLSRC = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
IPISICD = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
IPISICD = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayIcon = "msiexec.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
IDT = "1580972379"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
IDT = "1580972379"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
InstallDate = "2/6/2020 6:59:38 AM"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
InstallDate = "2/6/2020 6:59:38 AM"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
PMASS = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
PMASS = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
CLNG = "en"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
DisplayName = "ByteFence Anti-Malware Service"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
Start = "SERVICE_AUTO_START"

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence\
PINSTP

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence\PINSTP

Dropping Routine

This Potentially Unwanted Application drops the following files:

%System Root%\Program Files\ByteFence\InstallUtil.InstallLog
%System Root%\Program Files\ByteFence\x86\ext_x86.dll
%System Root%\Program Files\ByteFence\Uninstall.exe
%System Root%\program files\bytefence\Logs\MANIFEST-000001
%System Root%\Program Files\ByteFence\amd64\KernelTraceControl.dll
%User Temp%\bytefence-installer-5.5.0.7.exe
%System Root%\Program Files\ByteFence\rsEngineHelper.exe.config
%System Root%\Program Files\ByteFence\ByteFenceService.InstallState
%System Root%\Program Files\ByteFence\x86\rsEngineFW_x86.dll
%System Root%\program files\bytefence\Logs\CURRENT
%System Root%\Program Files\ByteFence\rsUtils.dll
%System Root%\Program Files\ByteFence\ByteFenceService.InstallLog
%System Root%\Program Files\ByteFence\EULA.txt
%System Root%\Program Files\ByteFence\x64\System.Data.SQLite.dll
%System Root%\Program Files\ByteFence\x64\ext_x64.dll
%System Root%\Program Files\ByteFence\x64\rsEngineFW_x64.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe
%System Root%\Program Files\ByteFence\x86\7z86.dll
%System Root%\Program Files\ByteFence\ByteFenceScan.exe
%System Root%\Program Files\ByteFence\x86\msdia140.dll
%System Root%\Program Files\ByteFence\x86\lz4_x86.dll
%System Root%\program files\bytefence\Logs\LOG
%System Root%\program files\bytefence\rsEngine.config
%System Root%\Program Files\ByteFence\Signatures.dat
%System Root%\Program Files\ByteFence\x64\7z64.dll
%System Root%\Program Files\ByteFence\protobuf-net.dll
%System Root%\Program Files\ByteFence\ByteFence.exe
%AppDataLocal%\GDIPFONTCACHEV1.DAT
%System Root%\program files\bytefence\Logs\000002.dbtmp
%System Root%\program files\bytefence\Logs\LOG.old
%System Root%\Program Files\ByteFence\Microsoft.Win32.TaskScheduler.dll
%System Root%\Program Files\ByteFence\rsEngineHelper.exe
%System Root%\Program Files\ByteFence\x64\rsLggrServer_x64.dll
%System Root%\Program Files\ByteFence\Microsoft.Diagnostics.Tracing.TraceEvent.dll
%System Root%\Program Files\ByteFence\Logs\err.dat
%User Temp%\InstallTools.exe
%System Root%\Program Files\ByteFence\x86\rsEnginePM_x86.dll
%System Root%\Program Files\ByteFence\websocket-sharp.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe.config
%System Root%\program files\bytefence\Logs\000003.log
%System Root%\Program Files\ByteFence\ByteFenceGUI.dll
%System Root%\Program Files\ByteFence\WhiteList.dat
%System Root%\Program Files\ByteFence\amd64\msdia140.dll
%System Root%\Program Files\ByteFence\Errors.dat
%System Root%\Program Files\ByteFence\x86\KernelTraceControl.dll
%System Root%\Program Files\ByteFence\x64\lz4_x64.dll
%System Root%\Program Files\ByteFence\x86\System.Data.SQLite.dll
%System Root%\program files\bytefence\Logs\LOCK
%System Root%\Program Files\ByteFence\rsEngine.dll
%System Root%\Program Files\ByteFence\x64\rsEnginePM_x64.dll
%System Root%\program files\bytefence\Logs\000001.dbtmp
%System Root%\Program Files\ByteFence\ByteFence.exe.config
%System Root%\program files\bytefence\Logs\MANIFEST-000002
%System Root%\Program Files\ByteFence\rsMessages.dll
%System Root%\Program Files\ByteFence\dummy.dat
%System Root%\Program Files\ByteFence\x86\rsLggrServer_x86.dll

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

This report is generated via an automated analysis system.

SOLUTION

Minimum Scan Engine:

9.850

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

Identify and terminate files detected as PUA.Win32.ByteFence.D

[ Learn More ]

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 3

Delete this registry value

[ Learn More ]

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\ByteFence
- INSNDE = "{random characters}"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- NDLAFLT = ""

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- NDLCHAN = ""

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- AFLTCREATED = "1589315104"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- DisplayName = "ByteFence Anti-Malware"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- UninstallString = "%System Root%\Program Files\ByteFence\uninstall.exe"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- Publisher = "Byte Technologies LLC"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- InstallSource = "%System Root%\Program Files\ByteFence"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- DisplayVersion = "5.5.0.7"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- DisplayIcon = "%System Root%\Program Files\ByteFence\Uninstall.exe"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- URLInfoAbout = "https://www.{BLOCKED}nce.com"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- NoModify = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- NoRepair = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- INSTUID = "{{GUID}}"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- MOLOG = "0"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- INSTUID = "{{GUID}}"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- MOLOG = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Application
- AutoBackupLogFiles = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\ByteFenceService
- EventMessageFile = "%Windows%\Microsoft.NET\Framework64\v2.0.50727\EventLogMessages.dll"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- FirstRun = "2/6/2020 6:58:02 AM"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- FirstRun = "2/6/2020 6:58:02 AM"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- U = "{GUID}"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- U = "{GUID}"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- EVNLSA = "637165724672027195"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- SAASCC = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- LMBLD = "3"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- LMBLD = "3"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- LMBLDH = "60ta4/FetA8mEhIuZN8s6Q=="

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- LMBLDH = "60ta4/FetA8mEhIuZN8s6Q=="

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- EINSTEX = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- EINSTEX = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- IPCD = "12345"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- IPCD = "12345"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- ETYBLD = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- ETYBLD = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- OINSTP = "{random characters}"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- OINSTP = "{random characters}"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- EVLSRC = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- EVLSRC = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- IPISICD = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- IPISICD = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
- DisplayIcon = "msiexec.exe"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- IDT = "1580972379"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- IDT = "1580972379"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- InstallDate = "2/6/2020 6:59:38 AM"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- InstallDate = "2/6/2020 6:59:38 AM"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- PMASS = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- PMASS = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- CLNG = "en"

In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ByteFenceService
- DisplayName = "ByteFence Anti-Malware Service"

In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ByteFenceService
- Start = "SERVICE_AUTO_START"

To delete the registry value this malware/grayware created:

Open Registry Editor.
» For Windows 7 and Windows Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2) users, right-click on the lower-left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>ByteFence
In the right panel, locate and delete the entry:
INSNDE = "{random characters}"
Again In the right panel, locate and delete the entry:
NDLAFLT = ""
Again In the right panel, locate and delete the entry:
NDLCHAN = ""
Again In the right panel, locate and delete the entry:
AFLTCREATED = "1589315104"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Wow6432Node>Microsoft>Windows>CurrentVersion>Uninstall>ByteFence
In the right panel, locate and delete the entry:
DisplayName = "ByteFence Anti-Malware"
Again In the right panel, locate and delete the entry:
UninstallString = "%System Root%\Program Files\ByteFence\uninstall.exe"
Again In the right panel, locate and delete the entry:
Publisher = "Byte Technologies LLC"
Again In the right panel, locate and delete the entry:
InstallSource = "%System Root%\Program Files\ByteFence"
Again In the right panel, locate and delete the entry:
DisplayVersion = "5.5.0.7"
Again In the right panel, locate and delete the entry:
DisplayIcon = "%System Root%\Program Files\ByteFence\Uninstall.exe"
Again In the right panel, locate and delete the entry:
URLInfoAbout = "https://www.{BLOCKED}nce.com"
Again In the right panel, locate and delete the entry:
NoModify = "1"
Again In the right panel, locate and delete the entry:
NoRepair = "1"
Again In the right panel, locate and delete the entry:
PINSTP = "/LM
Again In the right panel, locate and delete the entry:
INSTUID = "{{GUID}}"
Again In the right panel, locate and delete the entry:
MOLOG = "0"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Wow6432Node>ByteFence
In the right panel, locate and delete the entry:
PINSTP = "/LM
Again In the right panel, locate and delete the entry:
INSTUID = "{{GUID}}"
Again In the right panel, locate and delete the entry:
MOLOG = "0"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>eventlog>Application
In the right panel, locate and delete the entry:
AutoBackupLogFiles = "0"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>services>eventlog>Application>ByteFenceService
In the right panel, locate and delete the entry:
EventMessageFile = "%Windows%\Microsoft.NET\Framework64\v2.0.50727\EventLogMessages.dll"
Again In the right panel, locate and delete the entry:
FirstRun = "2/6/2020 6:58:02 AM"
Again In the right panel, locate and delete the entry:
FirstRun = "2/6/2020 6:58:02 AM"
Again In the right panel, locate and delete the entry:
U = "{GUID}"
Again In the right panel, locate and delete the entry:
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"
Again In the right panel, locate and delete the entry:
U = "{GUID}"
Again In the right panel, locate and delete the entry:
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"
Again In the right panel, locate and delete the entry:
EVNLSA = "637165724672027195"
Again In the right panel, locate and delete the entry:
SAASCC = "1"
Again In the right panel, locate and delete the entry:
LMBLD = "3"
Again In the right panel, locate and delete the entry:
LMBLD = "3"
Again In the right panel, locate and delete the entry:
LMBLDH = "60ta4/FetA8mEhIuZN8s6Q
Again In the right panel, locate and delete the entry:
LMBLDH = "60ta4/FetA8mEhIuZN8s6Q
Again In the right panel, locate and delete the entry:
EINSTEX = "1"
Again In the right panel, locate and delete the entry:
EINSTEX = "1"
Again In the right panel, locate and delete the entry:
IPCD = "12345"
Again In the right panel, locate and delete the entry:
IPCD = "12345"
Again In the right panel, locate and delete the entry:
ETYBLD = "1"
Again In the right panel, locate and delete the entry:
ETYBLD = "1"
Again In the right panel, locate and delete the entry:
OINSTP = "{random characters}"
Again In the right panel, locate and delete the entry:
OINSTP = "{random characters}"
Again In the right panel, locate and delete the entry:
EVLSRC = "1"
Again In the right panel, locate and delete the entry:
EVLSRC = "1"
Again In the right panel, locate and delete the entry:
IPISICD = "1"
Again In the right panel, locate and delete the entry:
IPISICD = "1"
Again In the right panel, locate and delete the entry:
DisplayIcon = "msiexec.exe"
Again In the right panel, locate and delete the entry:
IDT = "1580972379"
Again In the right panel, locate and delete the entry:
IDT = "1580972379"
Again In the right panel, locate and delete the entry:
InstallDate = "2/6/2020 6:59:38 AM"
Again In the right panel, locate and delete the entry:
InstallDate = "2/6/2020 6:59:38 AM"
Again In the right panel, locate and delete the entry:
PMASS = "1"
Again In the right panel, locate and delete the entry:
PMASS = "1"
Again In the right panel, locate and delete the entry:
CLNG = "en"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>ByteFenceService
In the right panel, locate and delete the entry:
DisplayName = "ByteFence Anti-Malware Service"
Again In the right panel, locate and delete the entry:
Start = "SERVICE_AUTO_START"
Close Registry Editor.

Step 4

Search and delete these components

[ Learn More ]

There may be some components 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.

%System Root%\Program Files\ByteFence\InstallUtil.InstallLog
%System Root%\Program Files\ByteFence\x86\ext_x86.dll
%System Root%\Program Files\ByteFence\Uninstall.exe
%System Root%\program files\bytefence\Logs\MANIFEST-000001
%System Root%\Program Files\ByteFence\amd64\KernelTraceControl.dll
%User Temp%\bytefence-installer-5.5.0.7.exe
%System Root%\Program Files\ByteFence\rsEngineHelper.exe.config
%System Root%\Program Files\ByteFence\ByteFenceService.InstallState
%System Root%\Program Files\ByteFence\x86\rsEngineFW_x86.dll
%System Root%\program files\bytefence\Logs\CURRENT
%System Root%\Program Files\ByteFence\rsUtils.dll
%System Root%\Program Files\ByteFence\ByteFenceService.InstallLog
%System Root%\Program Files\ByteFence\EULA.txt
%System Root%\Program Files\ByteFence\x64\System.Data.SQLite.dll
%System Root%\Program Files\ByteFence\x64\ext_x64.dll
%System Root%\Program Files\ByteFence\x64\rsEngineFW_x64.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe
%System Root%\Program Files\ByteFence\x86\7z86.dll
%System Root%\Program Files\ByteFence\ByteFenceScan.exe
%System Root%\Program Files\ByteFence\x86\msdia140.dll
%System Root%\Program Files\ByteFence\x86\lz4_x86.dll
%System Root%\program files\bytefence\Logs\LOG
%System Root%\program files\bytefence\rsEngine.config
%System Root%\Program Files\ByteFence\Signatures.dat
%System Root%\Program Files\ByteFence\x64\7z64.dll
%System Root%\Program Files\ByteFence\protobuf-net.dll
%System Root%\Program Files\ByteFence\ByteFence.exe
%AppDataLocal%\GDIPFONTCACHEV1.DAT
%System Root%\program files\bytefence\Logs\000002.dbtmp
%System Root%\program files\bytefence\Logs\LOG.old
%System Root%\Program Files\ByteFence\Microsoft.Win32.TaskScheduler.dll
%System Root%\Program Files\ByteFence\rsEngineHelper.exe
%System Root%\Program Files\ByteFence\x64\rsLggrServer_x64.dll
%System Root%\Program Files\ByteFence\Microsoft.Diagnostics.Tracing.TraceEvent.dll
%System Root%\Program Files\ByteFence\Logs\err.dat
%User Temp%\InstallTools.exe
%System Root%\Program Files\ByteFence\x86\rsEnginePM_x86.dll
%System Root%\Program Files\ByteFence\websocket-sharp.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe.config
%System Root%\program files\bytefence\Logs\000003.log
%System Root%\Program Files\ByteFence\ByteFenceGUI.dll
%System Root%\Program Files\ByteFence\WhiteList.dat
%System Root%\Program Files\ByteFence\amd64\msdia140.dll
%System Root%\Program Files\ByteFence\Errors.dat
%System Root%\Program Files\ByteFence\x86\KernelTraceControl.dll
%System Root%\Program Files\ByteFence\x64\lz4_x64.dll
%System Root%\Program Files\ByteFence\x86\System.Data.SQLite.dll
%System Root%\program files\bytefence\Logs\LOCK
%System Root%\Program Files\ByteFence\rsEngine.dll
%System Root%\Program Files\ByteFence\x64\rsEnginePM_x64.dll
%System Root%\program files\bytefence\Logs\000001.dbtmp
%System Root%\Program Files\ByteFence\ByteFence.exe.config
%System Root%\program files\bytefence\Logs\MANIFEST-000002
%System Root%\Program Files\ByteFence\rsMessages.dll
%System Root%\Program Files\ByteFence\dummy.dat
%System Root%\Program Files\ByteFence\x86\rsLggrServer_x86.dll

To manually delete a malware/grayware file from an affected system:

•For Windows 7, Windows Server 2008 (R2), Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2):

Open a Windows Explorer window.
- For Windows 7 and Server 2008 (R2) users, click Start>Computer.
- For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower-left corner of the screen,then click File Explorer.
In the Search Computer/This PC input box, type:
%System Root%\Program Files\ByteFence\InstallUtil.InstallLog
%System Root%\Program Files\ByteFence\x86\ext_x86.dll
%System Root%\Program Files\ByteFence\Uninstall.exe
%System Root%\program files\bytefence\Logs\MANIFEST-000001
%System Root%\Program Files\ByteFence\amd64\KernelTraceControl.dll
%User Temp%\bytefence-installer-5.5.0.7.exe
%System Root%\Program Files\ByteFence\rsEngineHelper.exe.config
%System Root%\Program Files\ByteFence\ByteFenceService.InstallState
%System Root%\Program Files\ByteFence\x86\rsEngineFW_x86.dll
%System Root%\program files\bytefence\Logs\CURRENT
%System Root%\Program Files\ByteFence\rsUtils.dll
%System Root%\Program Files\ByteFence\ByteFenceService.InstallLog
%System Root%\Program Files\ByteFence\EULA.txt
%System Root%\Program Files\ByteFence\x64\System.Data.SQLite.dll
%System Root%\Program Files\ByteFence\x64\ext_x64.dll
%System Root%\Program Files\ByteFence\x64\rsEngineFW_x64.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe
%System Root%\Program Files\ByteFence\x86\7z86.dll
%System Root%\Program Files\ByteFence\ByteFenceScan.exe
%System Root%\Program Files\ByteFence\x86\msdia140.dll
%System Root%\Program Files\ByteFence\x86\lz4_x86.dll
%System Root%\program files\bytefence\Logs\LOG
%System Root%\program files\bytefence\rsEngine.config
%System Root%\Program Files\ByteFence\Signatures.dat
%System Root%\Program Files\ByteFence\x64\7z64.dll
%System Root%\Program Files\ByteFence\protobuf-net.dll
%System Root%\Program Files\ByteFence\ByteFence.exe
%AppDataLocal%\GDIPFONTCACHEV1.DAT
%System Root%\program files\bytefence\Logs\000002.dbtmp
%System Root%\program files\bytefence\Logs\LOG.old
%System Root%\Program Files\ByteFence\Microsoft.Win32.TaskScheduler.dll
%System Root%\Program Files\ByteFence\rsEngineHelper.exe
%System Root%\Program Files\ByteFence\x64\rsLggrServer_x64.dll
%System Root%\Program Files\ByteFence\Microsoft.Diagnostics.Tracing.TraceEvent.dll
%System Root%\Program Files\ByteFence\Logs\err.dat
%User Temp%\InstallTools.exe
%System Root%\Program Files\ByteFence\x86\rsEnginePM_x86.dll
%System Root%\Program Files\ByteFence\websocket-sharp.dll
%System Root%\Program Files\ByteFence\ByteFenceService.exe.config
%System Root%\program files\bytefence\Logs\000003.log
%System Root%\Program Files\ByteFence\ByteFenceGUI.dll
%System Root%\Program Files\ByteFence\WhiteList.dat
%System Root%\Program Files\ByteFence\amd64\msdia140.dll
%System Root%\Program Files\ByteFence\Errors.dat
%System Root%\Program Files\ByteFence\x86\KernelTraceControl.dll
%System Root%\Program Files\ByteFence\x64\lz4_x64.dll
%System Root%\Program Files\ByteFence\x86\System.Data.SQLite.dll
%System Root%\program files\bytefence\Logs\LOCK
%System Root%\Program Files\ByteFence\rsEngine.dll
%System Root%\Program Files\ByteFence\x64\rsEnginePM_x64.dll
%System Root%\program files\bytefence\Logs\000001.dbtmp
%System Root%\Program Files\ByteFence\ByteFence.exe.config
%System Root%\program files\bytefence\Logs\MANIFEST-000002
%System Root%\Program Files\ByteFence\rsMessages.dll
%System Root%\Program Files\ByteFence\dummy.dat
%System Root%\Program Files\ByteFence\x86\rsLggrServer_x86.dll
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7 and Windows Server 2008 (R2).

Step 5

Search and delete these folders

[ Learn More ]

Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

%System Root%\Program Files\ByteFence
%System Root%\Program Files\ByteFence\amd64
%System Root%\Program Files\ByteFence\x64
%System Root%\Program Files\ByteFence\x86
%System Root%\program files\bytefence\Logs

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.ByteFence.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 7

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

%System Root%\Program Files\ByteFence\Logs\err.dat

Step 8

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
- PINSTP

In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
- PINSTP

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