Trend Micro threat encyclopedia: entry listing the Microsoft alias Trojan:Win32/Amadey.ADY!MTB (a ransomware sample, used only for the alias)

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.

As of this writing, the said sites are inaccessible.

It drops files as ransom note. It avoids encrypting files with the following file extensions.

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 adds the following folders: %AppDataLocal%\{UUID 1} %AppDataLocal%\{UUID 2} %System Root%\SystemID (Note: %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.)

%AppDataLocal%\{UUID 1}

%AppDataLocal%\{UUID 2}

%System Root%\SystemID

(Note: %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 drops the following copies of itself into the affected system: %AppDataLocal%\{UUID 1}\{Malware Name} (Note: %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).)

%AppDataLocal%\{UUID 1}\{Malware Name}

(Note: %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).)

It drops the following files: %User Temp%\delself.bat ← deletes the malware if it is found to be executing on a system that is located in particular countries %System%\Tasks\Time Trigger Task ← creates scheduled task for the malware %AppDataLocal%\bowsakkdestx.txt ← contains the public key and system encryption identifier, deleted afterwards %System Root%\SystemID\PersonalID.txt ← unique identifier for the affected system (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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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.)

%User Temp%\delself.bat ← deletes the malware if it is found to be executing on a system that is located in particular countries

%System%\Tasks\Time Trigger Task ← creates scheduled task for the malware

%AppDataLocal%\bowsakkdestx.txt ← contains the public key and system encryption identifier, deleted afterwards

%System Root%\SystemID\PersonalID.txt ← unique identifier for the affected system

(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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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: {Malware File Path}\{Malware Name} "{Malware File Path}\{Malware Name}" icacls "%AppDataLocal%\{UUID 1}" /deny *S-1-1-0:(OI)(CI)(DE,DC) ← protect this path/folder {Malware File Path}\{Malware Name} --Admin IsNotAutoStart IsNotTask (Note: %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).)

{Malware File Path}\{Malware Name} "{Malware File Path}\{Malware Name}"

icacls "%AppDataLocal%\{UUID 1}" /deny *S-1-1-0:(OI)(CI)(DE,DC) ← protect this path/folder

{Malware File Path}\{Malware Name} --Admin IsNotAutoStart IsNotTask

(Note: %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).)

It adds the following mutexes to ensure that only one of its copies runs at any one time: {1D6FC66E-D1F3-422C-8A53-C0BBCF3D900D} {FBB4BCC6-05C7-4ADD-B67B-A98A697323C1} IESQMMUTEX_0_208

{1D6FC66E-D1F3-422C-8A53-C0BBCF3D900D}

{FBB4BCC6-05C7-4ADD-B67B-A98A697323C1}

This Ransomware adds the following registry entries to enable its automatic execution at every system startup: HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion\Run SysHelper = %AppDataLocal%\{UUID 1}\{Malware File Name} --AutoStart

HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion\Run SysHelper = %AppDataLocal%\{UUID 1}\{Malware File Name} --AutoStart

Other System Modifications

This Ransomware adds the following registry entries: HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion SysHelper = 1

HKEY_CURRENT_USER\Software\Microsoft\ Windows\CurrentVersion SysHelper = 1

This Ransomware connects to the following URL(s) to send and receive commands from a remote malicious user: ADDRESS HASH} ← used to receive public key and system encryption identifier for the affected system.

ADDRESS HASH} ← used to receive public key and system encryption identifier for the affected system.

This Ransomware connects to the following website(s) to download and execute a malicious file:

As of this writing, the said sites are inaccessible.

This Ransomware gathers the following data: IP Address MAC Address Computer Name User Name

This Ransomware connects to the following URL(s) to get the affected system's IP address: --> It terminates and deletes itself on the affected system if the return of the IP address location is any of the following: RU (Russia) BY (Belarus) UA (Ukraine) AZ (Azerbaijan) AM (Armenia) TJ (Tajikistan) KZ (Kazakhstan) KG (Kyrgyzstan) UZ (Uzbekistan) SY (Syrian Arab Republic)

--> It terminates and deletes itself on the affected system if the return of the IP address location is any of the following: RU (Russia) BY (Belarus) UA (Ukraine) AZ (Azerbaijan) AM (Armenia) TJ (Tajikistan) KZ (Kazakhstan) KG (Kyrgyzstan) UZ (Uzbekistan) SY (Syrian Arab Republic)

It terminates and deletes itself on the affected system if the return of the IP address location is any of the following:

SY (Syrian Arab Republic)

It does the following: It checks if it is running on Windows XP or lower Windows versions. If this condition is met, it will check for a service named "MYSQL" and terminate it. It tries to open the following file(s): I:\5d2860c89d774.jpg

It checks if it is running on Windows XP or lower Windows versions. If this condition is met, it will check for a service named "MYSQL" and terminate it.

It tries to open the following file(s): I:\5d2860c89d774.jpg

It accepts the following parameters: --Admin → the malware is executed with admin privileges --AutoStart → the malware is executed using autorun registry key(s) --Task → the malware is executed using the created scheduled task IsAutoStart/IsNotAutoStart → executes malware as an autostart or not IsTask/IsNotTask → executes malware as a scheduled task or not

--Admin → the malware is executed with admin privileges

--AutoStart → the malware is executed using autorun registry key(s)

--Task → the malware is executed using the created scheduled task

IsAutoStart/IsNotAutoStart → executes malware as an autostart or not

IsTask/IsNotTask → executes malware as a scheduled task or not

It adds the following scheduled tasks: Task Name: Azure-Update-Task Task Action: %Application Data%\Microsoft\Network\mstsca.exe Task Name: Time Trigger Task Task Action: %AppDataLocal\{Malware Name} --Task (Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Task Name: Azure-Update-Task Task Action: %Application Data%\Microsoft\Network\mstsca.exe

Task Name: Time Trigger Task Task Action: %AppDataLocal\{Malware Name} --Task

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

This Ransomware avoids encrypting files with the following strings in their file name: ntuser.dat ntuser.dat.LOG1 ntuser.dat.LOG2 ntuser.pol _readme.txt

It avoids encrypting files found in the following folders: %Program Files%\Google %Program Files%\Internet Explorer %Program Files%\Mozilla Firefox %System Root%\dell %System Root%\Games %System Root%\Intel %System Root%\MSOCache %System Root%\PerfLogs %System Root%\ProgramData %System Root%\Recovery %System Root%\SystemID %System Root%\Windows %System Root%\Windows.old {Drive Letter}\dell {Drive Letter}\Games {Drive Letter}\Intel {Drive Letter}\MSOCache {Drive Letter}\PerfLogs {Drive Letter}\Windows (Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 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.)

%Program Files%\Google

%Program Files%\Internet Explorer

%Program Files%\Mozilla Firefox

%System Root%\MSOCache

%System Root%\PerfLogs

%System Root%\ProgramData

%System Root%\Recovery

%System Root%\SystemID

%System Root%\Windows

%System Root%\Windows.old

{Drive Letter}\MSOCache

{Drive Letter}\PerfLogs

{Drive Letter}\Windows

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 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 appends the following extension to the file name of the encrypted files: .xaro

It drops the following file(s) as ransom note: {Encrypted Directory}\_readme.txt

{Encrypted Directory}\_readme.txt

It avoids encrypting files with the following file extensions: .ini .DLL .dll .blf .bat .lnk .regtrans-ms

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.XXPE50FFF079

TROJ.Win32.TRX.XXPE50FFF079

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.

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 step.

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 step.

%User Temp%\delself.bat

%System%\Tasks\Time Trigger Task

%AppDataLocal%\bowsakkdestx.txt

%System Root%\SystemID\PersonalID.txt

%AppDataLocal%\{UUID 1}\{Malware Name}

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 .

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 Computer/This PC input box, type: %User Temp%\delself.bat %System%\Tasks\Time Trigger Task %AppDataLocal%\bowsakkdestx.txt %System Root%\SystemID\PersonalID.txt %AppDataLocal%\{UUID 1}\{Malware Name} 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).

%User Temp%\delself.bat

%System%\Tasks\Time Trigger Task

%AppDataLocal%\bowsakkdestx.txt

%System Root%\SystemID\PersonalID.txt

%AppDataLocal%\{UUID 1}\{Malware Name}

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).

%AppDataLocal%\{UUID 1}

%AppDataLocal%\{UUID 2}

%System Root%\SystemID

To delete the malware/grayware folder:

Right-click Start then click ... or Find... , depending on the version of Windows you are running.

In the Named input box, type: %AppDataLocal%\{UUID 1} %AppDataLocal%\{UUID 2} %System Root%\SystemID In the Look In drop-down list, select My Computer , then press Enter. Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.

%AppDataLocal%\{UUID 1}

%AppDataLocal%\{UUID 2}

%System Root%\SystemID

In the Look In drop-down list, select My Computer , then press Enter.

Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.

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\Microsoft\Windows\CurrentVersion\Run SysHelper = %AppDataLocal%\{UUID 1}\{Malware Name} --AutoStart In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion SysHelper = 1

SysHelper = %AppDataLocal%\{UUID 1}\{Malware Name} --AutoStart

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion SysHelper = 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 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_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run

In the right panel, locate and delete the entry: SysHelper = %AppDataLocal%\{UUID 1}\{Malware Name} --AutoStart

In the left panel of the Registry Editor window, double-click the following: HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion

In the right panel, locate and delete the entry: SysHelper = 1

Close Registry Editor.

Deleting Scheduled Tasks while in Safe Mode Still in safe mode, the following {Task Name}-{Task to be run} listed should be used in the steps identified below: Time Trigger Task - %AppDataLocal%\{Malware Filename}.exe --Task Azure-Update-Task - %Application Data%\Microsoft\Network\mstsca.exe For Windows 7 and Server 2008 (R2) users, click Start>Computer. For Windows 8, 8.1, 10, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer. In the Computer/This PC input box, type: %System%\Tasks\ {Task Name} Once located, select the file then press SHIFT+DELETE to delete it. Open Registry Editor. To do this: For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the input field, and 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 In the left panel of the Registry Editor window, double-click the following: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name} Locate the created entry and take note of the registry value's data: ID= {Task Data} After taking note of the data, delete the registry key: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name} In the left panel of the Registry Editor window, double-click the following: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tasks Still in the left panel, locate and delete the registry key with the same name as the located Task Data in step #6: = {Task Data} Close Registry Editor.

Deleting Scheduled Tasks while in Safe Mode

Still in safe mode, the following {Task Name}-{Task to be run} listed should be used in the steps identified below: Time Trigger Task - %AppDataLocal%\{Malware Filename}.exe --Task Azure-Update-Task - %Application Data%\Microsoft\Network\mstsca.exe

Time Trigger Task - %AppDataLocal%\{Malware Filename}.exe --Task

Azure-Update-Task - %Application Data%\Microsoft\Network\mstsca.exe

For Windows 7 and Server 2008 (R2) users, click Start>Computer. For Windows 8, 8.1, 10, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.

For Windows 8, 8.1, 10, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.

In the Computer/This PC input box, type: %System%\Tasks\ {Task Name}

%System%\Tasks\ {Task Name}

Once located, select the file then press SHIFT+DELETE to delete it.

Open Registry Editor. To do this: For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the input field, and 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

For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the input field, and 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

In the left panel of the Registry Editor window, double-click the following: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name}

HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name}

Locate the created entry and take note of the registry value's data: ID= {Task Data}

After taking note of the data, delete the registry key: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name}

HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree> {Task Name}

In the left panel of the Registry Editor window, double-click the following: HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tasks

HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tasks

Still in the left panel, locate and delete the registry key with the same name as the located Task Data in step #6: = {Task Data}

Close Registry Editor.

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.STOP.THDOEBD. 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: and Office Support Business Support

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Restore encrypted files from backup.