Ransom.Win32.MIMIC.SMZTJJ-A

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Elimina entradas de registro para causar el funcionamiento incorrecto de aplicaciones y programas.

Detalles de entrada

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Instalación

Infiltra los archivos siguientes:

• {All affected directories}\Decrypt_me.txt
• %User Temp%\session.tmp
• %AppDataLocal%\{GUID}\bestplacetolive.exe
• %AppDataLocal%\{GUID}\session.tmp
• %User Temp%\{random letters}.{random letters}.ps1
• %User Temp%\{random letters}.{random letters}.psm1
• %AppDataLocal%\{GUID}\Everything32.dll

(Nota: %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000(32-bit), XP y Server 2003(32-bit) suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp y en el case de Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) y 10(64-bit) en C:\Users\{nombre de usuario}\AppData\Local\Temp).

Agrega los procesos siguientes:

• "%AppDataLocal%\{GUID}\bestplacetolive.exe"
• "%AppDataLocal%\{GUID}\bestplacetolive.exe" -e watch -pid {PID of bestplacetolive.exe} -!
• "%AppDataLocal%\{GUID}\bestplacetolive.exe" -e ul1
• "%AppDataLocal%\{GUID}\bestplacetolive.exe" -e ul2
• powercfg.exe -H off
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 1} 0
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 2} 0
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 3} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 1} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 2} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID} {GUID Subgroup} {GUID Setting 3} 0
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 1} 0
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 2} 0
• powercfg.exe -SETACVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 3} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 1} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 2} 0
• powercfg.exe -SETDCVALUEINDEX {Power scheme GUID 2} {GUID Subgroup} {GUID Setting 3} 0
• powercfg.exe -S {Power scheme GUID}
• powercfg.exe -S {Power scheme GUID 2}
• powershell.exe -ExecutionPolicy Bypass "Get-VM | Stop-VM"
• powershell.exe -ExecutionPolicy Bypass "Get-VM | Select-Object vmid | Get-VHD | %{Get-DiskImage -ImagePath $_.Path; Get-DiskImage -ImagePath $_.ParentPath} | Dismount-DiskImage"
• powershell.exe -ExecutionPolicy Bypass "Get-Volume | Get-DiskImage | Dismount-DiskImage"
• cmd.exe /c DC.exe /D

Crea las carpetas siguientes:

• %AppDataLocal%\{GUID}
• %System Root%\temp

(Nota: %System Root% es la carpeta raíz, normalmente C:\. También es la ubicación del sistema operativo).

Agrega las siguientes exclusiones mutuas para garantizar que solo se ejecuta una de sus copias en todo momento:

• iitiitLavvoiteaieii

Técnica de inicio automático

Agrega las siguientes entradas de registro para permitir su ejecución automática cada vez que se inicia el sistema:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
bestplacetolive = "%AppDataLocal%\{GUID}\bestplacetolive.exe"

Otras modificaciones del sistema

Modifica las siguientes entradas de registro:

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
shutdownwithoutlogon = 0

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

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

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
DataCollection
AllowTelemetry = 0

(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.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
UNCAsIntranet = 0

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
AutoDetect = 1

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

Elimina las siguientes entradas de registro:

HKEY_CURRENT_USER\Software\Policies\
Microsoft\Windows
System = DisableCMD

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows
System = DisableCMD

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ZoneMap = ProxyBypass

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
ZoneMap = ProxyBypass

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ZoneMap = IntranetName

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
ZoneMap = IntranetName

Finalización del proceso

Finaliza los procesos siguientes si detecta que se ejecutan en la memoria del sistema afectado:

• agntsvc.exe
• autodeskDesktopApp.exe
• axlbridge.exe
• bedbh.exe
• benetns.exe
• bengien.exe
• beserver.exe
• CoreSync.exe
• Creative Cloud.exe
• dbeng50.exe
• dbsnmp.exe
• encsvc.exe
• EnterpriseClient.exe
• fbguard.exe
• fbserver.exe
• fdhost.exe
• fdlauncher.exe
• httpd.exe
• isqlplussvc.exe
• java.exe
• msaccess.exe
• MsDtSrvr.exe
• msftesql.exe
• mspub.exe
• mydesktopqos.exe
• mydesktopservice.exe
• mysqld-nt.exe
• mysqld-opt.exe
• mysqld.exe
• node.exe
• ocautopds.exe
• ocomm.exe
• ocssd.exe
• oracle.exe
• pvlsvr.exe
• python.exe
• QBDBMgr.exe
• QBDBMgrN.exe
• QBIDPService.exe
• qbupdate.exe
• QBW32.exe
• QBW64.exe
• Raccine.exe
• Raccine_x86.exe
• RaccineElevatedCfg.exe
• RaccineSettings.exe
• RAgui.exe
• raw_agent_svc.exe
• SimplyConnectionManager.exe
• sqbcoreservice.exe
• sqlagent.exe
• sqlbrowser.exe
• sqlmangr.exe
• Sqlservr.exe
• sqlwriter.exe
• Ssms.exe
• Sysmon.exe
• Sysmon64.exe
• tbirdconfig.exe
• tomcat6.exe
• VeeamDeploymentSvc.exe
• vsnapvss.exe
• vxmon.exe
• wdswfsafe.exe
• wpython.exe
• wsa_service.exe
• wxServer.exe
• wxServerView.exe
• xfssvccon.exe

Otros detalles

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion
Image File Execution Options = {list of processes to be terminated}

HKEY_LOCAL_MACHINE\SOFTWARE
Classes = mimicfile

HKEY_LOCAL_MACHINE\SOFTWARE
Classes = .QUIETPLACE

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

Requiere los componentes adicionales siguientes para ejecutarse correctamente:

• Everything32.dll

Hace lo siguiente:

• Collecting system information
• Creating persistence via the RUN key
• Bypassing User Account Control (UAC)
• Disabling Windows Defender
• Disabling Windows telemetry
• Activating anti-shutdown measures
• Activating anti-kill measures
• Unmounting Virtual Drives
• Terminating processes and services
• Disabling sleep mode and shutdown of the system
• Removing indicators
• Inhibiting System Recovery