Ransom.Win32.RANESTATE.THGAABD

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

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

Agrega los procesos siguientes:

• bcdedit /set {current} safeboot network → if -safe commandline parameter is used.

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

• Global\02a4da2bbb8d0a734e8e99f24165686e

Otras modificaciones del sistema

Modifica las siguientes entradas de registro:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
AutoAdminLogon = 1 → if -safe commandline parameter is used

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
DefaultUserName = Administrator if -safe commandline parameter is used

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
DefaultDomainName = {Computer Domain Name} if -safe commandline parameter is used

Finalización del proceso

Finaliza los servicios siguientes si los detecta en el sistema afectado:

• vss
• sql
• svc$
• memtas
• mepocs
• msexchange
• sophos
• veeam
• backup
• GxVss
• GxBlr
• GxFWD
• GxCVD
• GxCIMgr

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

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

Robo de información

Recopila los siguientes datos:

• Hostname
• Username
• OS version
• Domain
• Architecture
• Language

Otros detalles

Hace lo siguiente:

• If not executed with admin rights, it will attempt to relaunch itself as admin by elevating its privileges via bypassing UAC
• It encrypts fixed, removable and network shares
• It deletes files in recycle bin folder for removable and fixed drives
• It uses WQL to delete shadow copies
• It renames itself 26 times before deleting itself after encryption
• It has the capability to print the ransom note in infected machines
• It deletes the following services:
  • WdBoot
  • WdFilter
  • WdNisDrv
  • WdNisSvc
  • WinDefend
  • wscsvc
  • sppsvc
  • Sense
  • SecurityHealthService
• It duplicates the token of the following:
  • explorer.exe - to gain privileged domain access
  • lsass.exe
  • TrustedInstaller - service is started if not yet running
• It contains a list of username:password that it will use to log into domain controllers.