Ransom.Win64.CHARON.THGBCBE

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

• OopsCharonHere

Finalización del proceso

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

• AcronisAgent
• AcrSch2Svc
• backup
• BackupExecAgentAccelerator
• BackupExecAgentBrowser
• BackupExecDiveciMediaService
• BackupExecJobEngine
• BackupExecManagementService
• BackupExecRPCService
• BackupExecVSSProvider
• CAARCUpdateSvc
• CASAD2DWebSvc
• ccEvtMgr
• ccSetMgr
• DefWatch
• GxBlr
• GxCIMgr
• GxCVD
• GxFWD
• GxVss
• Intuit.QuickBooks.FCS
• memtas
• mepocs
• PDVFSService
• QBCFMonitorService
• QBFCService
• QBIDPService
• RTVscan
• SavRoam
• sophos
• sql
• stc_raw_agent
• svc$
• veeam
• veeam
• VeeamDeploymentService
• VeeamNFSSvc
• VeeamTransportSvc
• VSNAPVSS
• vss
• YooBackup
• YooIT
• zhudongfangyu

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

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

Otros detalles

Hace lo siguiente:

• It empties the Recycle Bin to eliminate deleted files permanently
• It removes shadow copies and backup data to prevent file recovery.
• It encrypts files based on their size using a variable encryption pattern:
  • Files ≤ 64KB: Entire file is encrypted.
  • Files between 64KB and 5MB: Encrypts 3 segments — start (0%), middle (50%), and end (75%).
  • Files between 5MB and 20MB: Encrypts 5 evenly distributed segments across the file.
  • Files >20MB: Encrypts 7 key positions — 0%, 12.5%, 25%, 50%, 75%, 87.5%, and near the end (~95%).
• It adds this specific marker to each encrypted file:
  • hCharon is enter to the urworld!
• It has the capability to create a malicious service as part of its Anti-EDR strategy:
  • WWC
  • Executes from %System%\WWC.sys

(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).