Ransom.Win32.MIMIC.YXDGS

July 28, 2023

Analysis by: John Rainier Navato

ALIASES:

UDS:Trojan-Ransom.Win32.Generic (KASPERSKY)

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

INFORMATION EXPOSURE:

Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

TECHNICAL DETAILS

File Size:

2,913,981 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

19 Jul 2023

Payload:

Drops files, Modifies system registry, Encrypts files

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:

%User Temp%\7ZipSfx.000
%User Temp%\7ZipSfx.000\7za.exe
%User Temp%\7ZipSfx.000\Everything.exe
%User Temp%\7ZipSfx.000\Everything32.dll
%User Temp%\7ZipSfx.000\Everything64.dll
%User Temp%\7ZipSfx.000\Everything.ini
%User Temp%\7ZipSfx.000\Everything2.ini
%User Temp%\7ZipSfx.000\DC.exe
%User Temp%\7ZipSfx.000\Peninsuela.exe
%User Temp%\7ZipSfx.000\sdel.exe
%User Temp%\7ZipSfx.000\sdel64.exe
%User Temp%\7ZipSfx.000\session.tmp
%AppDataLocal%\{{Random Characters}}\7za.exe
%AppDataLocal%\{{Random Characters}}\DC.exe
%AppDataLocal%\{{Random Characters}}\Everything.exe
%AppDataLocal%\{{Random Characters}}\Everything.ini
%AppDataLocal%\{{Random Characters}}\Everything2.ini
%AppDataLocal%\{{Random Characters}}\Everything32.dll
%AppDataLocal%\{{Random Characters}}\Everything64.dll
%AppDataLocal%\{{Random Characters}}\BITCOIN.exe
%AppDataLocal%\{{Random Characters}}\sdel.exe
%AppDataLocal%\{{Random Characters}}\sdel64.exe
%AppDataLocal%\{{Random Characters}}\session.tmp
%System Root%\OMO_OMO_Decryption.txt

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

It adds the following processes:

"%User Temp%\7zipSfx.000\7za.exe" I
"%User Temp%\7zipSfx.000\7za.exe" x -y -p1949911452596921523 Everything64.dll
%User Temp%\7zipSfx.000\Peninsula.exe"
%AppDataLocal%\{{Random Characters}}\BITCOIN.exe
cmd.exe /c DC.exe /D
"%AppDataLocal%\{{Random Characters}}\BITCOIN.exe" -e watch -pid {PID} -!
"%AppDataLocal%\{{Random Characters}}\BITCOIN.exe" -e ul1
"%AppDataLocal%\{{Random Characters}}\BITCOIN.exe" -e ul2
"%Prgoram Files%\Everything\Everything.exe" -startup
cmd /c ""%User Temp%\7ZSfx000.cmd" "
powercfg.exe -H off
powercfg.exe -SETACVALUEINDEX {Random Hex Values 1} 0
powercfg.exe -SETACVALUEINDEX {Random Hex Values 2} 0
powercfg.exe -SETACVALUEINDEX {Random Hex Values 3} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 1} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 2} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 3} 0
powercfg.exe -SETACVALUEINDEX {Random Hex Values 1} 0
powercfg.exe -SETACVALUEINDEX {Random Hex Values 2} 0
powercfg.exe -SETACVALUEINDEX {Random Hex Values 3} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 1} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 2} 0
powercfg.exe -SETDCVALUEINDEX {Random Hex Values 3} 0
powercfg.exe -S {Random Hex Values 4}
powercfg.exe -S {Random Hex Values 5}
powercfg.exe -ExecutionPolicy Bypass "Get -VM | Stop-VM"
powercfg.exe -ExecutionPolicy Bypass "Get -VM | Select-Object vmid | Get-VHD | %{Get-DiskImage-ImagePath $_.Path; Get-DiskImage-ImagePath $-.ParentPath} | Dismount-DiskImage"
powercfg.exe -ExecutionPolicy Bypass "Get -Volume | Get-DiskImage | Dismount-DiskImage"

It creates the following folders:

%User Temp%\7ZipSfx.000
%AppDataLocal%\{GUID}
%System Root%\temp

Autostart Technique

This Ransomware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
BITCOIN.exe = notepad.exe "%AppDataLocal%\OMO_OMO_Decryption.txt

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Everything = %Progmra Files%\Everything\Everything.exe

It adds the following Image File Execution Options registry entries to automatically execute itself whenever certain applications are run:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
{Service Name}
Debugger = %System%Systray.exe

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\ Windows Defender
DisableAntiSpyware = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
HidePowerOptions = 1

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
shutdownwithoutlogon = 0

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
DataCollection
AllowTelemetry = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mimicfile\shell\open\
command
(Default) = notepad.exe "%AppDataLocal%\OMO_OMO_Decryption.txt

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.org
(Default) = mimicfile

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Owner = {Random Hex Values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Session Hash = {Random Hex Values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Sequence = 1

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFiles0000 = %User Profile%\Documents\rem.edk

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFilesHash = {Random Hex Values}

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFiles0000 = %AppDataLocal%\Vmware\hgfs.dat

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFiles0000 = %AppDataLocal%\{{Random Characters}}\BITCOIN.exe

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFiles0000 = %AppDataLocal%\{{Random Characters}}\Everything32.exe

HKEY_USERS\{SID}\exefile\
shell\open\command
(Default) = "%1" %*

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
HidePowerOptions = 1

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoClose = 1

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
StartMenuLogOff = 1

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\FileSystem
LongPathsEnabled = 1

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender
DisableAntiSpyware = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender\Real-Time Protection
DisableRealTimeMonitoring = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\WinDefend
Start = 3

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\VSS
Start = 4

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\SDRSVC
Start = 4

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\wbengine
Start = 4

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
ConsentPromptBehaviorAdmin = 0

(Note: The default value data of the said registry entry is 5.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
ConsentPromptBehaviorUser = 0

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
PromptOnSecureDesktop = 0

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
EnableLUA = 0

(Note: The default value data of the said registry entry is 1.)

Other Details

This Ransomware adds the following registry keys:

HKEY_USERS\{SID Class}\exefile

HKEY_USERS\{SID Class}\exefile\
shell

HKEY_USERS\{SID Class}\exefile\
shell\open

HKEY_USERS\{SID Class}\exefile\
shell\open\command

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows Defender

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Data Collection

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\FileSystem

HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows\System

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mimicfile

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mimicfile\shell

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mimicfile\shell\open

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mimic\shell\open\
command

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.org

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

{BLOCKED}llakonososeila@gonionmail.org

SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.592.05

FIRST VSAPI PATTERN DATE:

25 Jul 2023

VSAPI OPR PATTERN File:

18.593.00

VSAPI OPR PATTERN Date:

26 Jul 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.XXPE50FSX036

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

Restart in Safe Mode

[ Learn More ]

Step 5

Restore this modified 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\Microsoft\Windows Defender
- DisableAntiSpyware = 1 (Change to default value: 0)
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Real-Time Protection
- DisableRealTimeMonitoring = 1 (Change to default value: 0)
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\WinDefend
- Start = 3 (Change to default value: 2)
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS
- Start = 4 (Change to default value: 3)
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\SDRSVC
- Start = 4 (Change to default value: 3)
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\wbengine
- Start = 4 (Change to default value: 3)
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
- ConsentPromptBehaviorAdmin = 0 (Change to default value: 5)
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
- ConsentPromptBehaviorUser = 0 (Change to default value: 3)
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
- PromptOnSecureDesktop = 0 (Change to default value: 1)
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
- EnableLUA = 0 (Change to default value: 1)

To restore the registry value this malware/grayware modified:

Open Registry Editor.
» For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, 8.1, 10, and 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>Microsoft>Windows Defender
In the right panel, locate the registry value:
DisableAntiSpyware = 1 (Change to default value: 0)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows Defender>Real-Time Protection
In the right panel, locate the registry value:
DisableRealTimeMonitoring = 1 (Change to default value: 0)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>services>WinDefend
In the right panel, locate the registry value:
Start = 3 (Change to default value: 2)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>services>VSS
In the right panel, locate the registry value:
Start = 4 (Change to default value: 3)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>services>SDRSVC
In the right panel, locate the registry value:
Start = 4 (Change to default value: 3)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>services>wbengine
In the right panel, locate the registry value:
Start = 4 (Change to default value: 3)
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Policies>System
In the right panel, locate the registry value:
ConsentPromptBehaviorAdmin = 0 (Change to default value: 5)
Again In the right panel, locate the registry value:
ConsentPromptBehaviorUser = 0 (Change to default value: 3)
Again In the right panel, locate the registry value:
PromptOnSecureDesktop = 0 (Change to default value: 1)
Again In the right panel, locate the registry value:
EnableLUA = 0 (Change to default value: 1)
Close Registry Editor.

Step 6

Delete this registry value

[ Learn More ]

In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\ Windows Defender
- DisableAntiSpyware = 1
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer
- HidePowerOptions = 1
In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
- shutdownwithoutlogon = 0
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\DataCollection
- AllowTelemetry = 0
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mimicfile\shell\open\command
- (Default) = notepad.exe "%AppDataLocal%\OMO_OMO_Decryption.txt
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.org
- (Default) = mimicfile
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- Owner = {Random Hex Values}
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- Session Hash = {Random Hex Values}
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- Sequence = 1
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- RegFiles0000 = %User Profile%\Documents\rem.edk
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- RegFilesHash = {Random Hex Values}
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- RegFiles0000 = %AppDataLocal%\Vmware\hgfs.dat
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- RegFiles0000 = %AppDataLocal%\{{Random Characters}}\BITCOIN.exe
In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- RegFiles0000 = %AppDataLocal%\{{Random Characters}}\Everything32.exe
In HKEY_USERS\{SID}\exefile\shell\open\command
- (Default) = "%1" %*
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
- HidePowerOptions = 1
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
- NoClose = 1
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
- StartMenuLogOff = 1
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\FileSystem
- LongPathsEnabled = 1

To delete the registry value this malware created:

Open Registry Editor. To do this:
» 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, 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 of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft> Windows Defender
In the right panel, locate and delete the entry:
DisableAntiSpyware = 1
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Policies>Explorer
In the right panel, locate and delete the entry:
HidePowerOptions = 1
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>SOFTWARE>Microsoft>Windows>CurrentVersion>Policies>System
In the right panel, locate and delete the entry:
shutdownwithoutlogon = 0
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies>DataCollection
In the right panel, locate and delete the entry:
AllowTelemetry = 0
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>mimicfile>shell>open>command
In the right panel, locate and delete the entry:
(Default) = notepad.exe "%AppDataLocal%\OMO_OMO_Decryption.txt
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.org
In the right panel, locate and delete the entry:
(Default) = mimicfile
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>RestartManager>Session0000
In the right panel, locate and delete the entry:
Owner = {Random Hex Values}
Again In the right panel, locate and delete the entry:
Session Hash = {Random Hex Values}
Again In the right panel, locate and delete the entry:
Sequence = 1
Again In the right panel, locate and delete the entry:
RegFiles0000 = %User Profile%\Documents\rem.edk
Again In the right panel, locate and delete the entry:
RegFilesHash = {Random Hex Values}
Again In the right panel, locate and delete the entry:
RegFiles0000 = %AppDataLocal%\Vmware\hgfs.dat
Again In the right panel, locate and delete the entry:
RegFiles0000 = %AppDataLocal%\{{Random Characters}}\BITCOIN.exe
Again In the right panel, locate and delete the entry:
RegFiles0000 = %AppDataLocal%\{{Random Characters}}\Everything32.exe
In the left panel of the Registry Editor window, double-click the following:
HKEY_USERS>{SID}>exefile>shell>open>command
In the right panel, locate and delete the entry:
(Default) = "%1" %*
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies>Explorer
In the right panel, locate and delete the entry:
HidePowerOptions = 1
Again In the right panel, locate and delete the entry:
NoClose = 1
Again In the right panel, locate and delete the entry:
StartMenuLogOff = 1
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Control>FileSystem
In the right panel, locate and delete the entry:
LongPathsEnabled = 1
Close Registry Editor.

Step 7

Delete this registry key

[ Learn More ]

In HKEY_USERS\{SID Class}\exefile\shell\open
- command
In HKEY_USERS\{SID Class}\exefile\shell
- open
In HKEY_USERS\{SID Class}\exefile
- shell
In HKEY_USERS\{SID Class}
- exefile
In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft
- Windows Defender
In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies
- Explorer
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- Explorer
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- System
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- Data Collection
In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control
- FileSystem
In HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows
- System
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mimic\shell\open
- command
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mimic\shell
- open
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mimic
- shell
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- mimic
In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .org

To delete registry keys this malware/grayware created:

Open Registry Editor. To do this:
» For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, 8.1, 10, and 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 of the Registry Editor window, double-click the following:
HKEY_USERS>{SID Class}>exefile>shell>open
Still in the left panel, locate and delete the key:
command
In the left panel of the Registry Editor window, double-click the following:
HKEY_USERS>{SID Class}>exefile>shell
Still in the left panel, locate and delete the key:
open
In the left panel of the Registry Editor window, double-click the following:
HKEY_USERS>{SID Class}>exefile
Still in the left panel, locate and delete the key:
shell
In the left panel of the Registry Editor window, double-click the following:
HKEY_USERS>{SID Class}
Still in the left panel, locate and delete the key:
exefile
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft
Still in the left panel, locate and delete the key:
Windows Defender
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Policies
Still in the left panel, locate and delete the key:
Explorer
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies
Still in the left panel, locate and delete the key:
Explorer
Again Still in the left panel, locate and delete the key:
System
Again Still in the left panel, locate and delete the key:
Data Collection
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Control
Still in the left panel, locate and delete the key:
FileSystem
In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Policies>Microsoft>Windows
Still in the left panel, locate and delete the key:
System
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>mimic>shell>open
Still in the left panel, locate and delete the key:
command
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>mimic>shell
Still in the left panel, locate and delete the key:
open
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>mimic
Still in the left panel, locate and delete the key:
shell
In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes
Still in the left panel, locate and delete the key:
mimic
Again Still in the left panel, locate and delete the key:
.org
Close Registry Editor.

Step 8

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%\7ZipSfx.000
%User Temp%\7ZipSfx.000\7za.exe
%User Temp%\7ZipSfx.000\Everything.exe
%User Temp%\7ZipSfx.000\Everything32.dll
%User Temp%\7ZipSfx.000\Everything64.dll
%User Temp%\7ZipSfx.000\Everything.ini
%User Temp%\7ZipSfx.000\Everything2.ini
%User Temp%\7ZipSfx.000\DC.exe
%User Temp%\7ZipSfx.000\Peninsuela.exe
%User Temp%\7ZipSfx.000\sdel.exe
%User Temp%\7ZipSfx.000\sdel64.exe
%User Temp%\7ZipSfx.000\session.tmp
%AppDataLocal%\{{Random Characters}}\7za.exe
%AppDataLocal%\{{Random Characters}}\DC.exe
%AppDataLocal%\{{Random Characters}}\Everything.exe
%AppDataLocal%\{{Random Characters}}\Everything.ini
%AppDataLocal%\{{Random Characters}}\Everything2.ini
%AppDataLocal%\{{Random Characters}}\Everything32.dll
%AppDataLocal%\{{Random Characters}}\Everything64.dll
%AppDataLocal%\{{Random Characters}}\BITCOIN.exe
%AppDataLocal%\{{Random Characters}}\sdel.exe
%AppDataLocal%\{{Random Characters}}\sdel64.exe
%AppDataLocal%\{{Random Characters}}\session.tmp
%System Root%\OMO_OMO_Decryption.txt

Step 9

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.

%User Temp%\7ZipSfx.000
%AppDataLocal%\{GUID}
%System Root%\temp

Step 10

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

Step 11

Restore encrypted files from backup.

Step 12

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.MIMIC.YXDGS. 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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Ransom.Win32.MIMIC.YXDGS

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Resources

Support

About Trend

Country Headquarters

Ransom.Win32.MIMIC.YXDGS

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Resources

Support

About Trend

Country Headquarters

The Americas

Middle East & Africa

Europe

Asia & Pacific