Analisado por: Jeffrey Francis Bonaobra   

 

Linux/Filecoder.Royal.B trojan (NOD32), Ransom:Linux/BlackSuit.A!MTB (MICROSOFT)

 Plataforma:

Windows

 Classificao do risco total:
 Potencial de dano:
 Potencial de distribuição:
 infecção relatada:
 Exposição das informações:
Baixo
Medium
Alto
Crítico

  • Tipo de grayware:
    Ransomware

  • Destrutivo:
    Não

  • Criptografado:
    Não

  • In the Wild:
    Sim

  Visão geral

Canal de infecção: Aus dem Internet heruntergeladen, Fallen gelassen von anderer Malware

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

  Detalhes técnicos

Tipo de compactação: 2,578,074 bytes
Tipo de arquivo: ELF
Residente na memória: Não
Data de recebimento das amostras iniciais: 04 maio 2023
Carga útil: Drops files, Encrypts files

Übertragungsdetails

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

Installation

Schleust die folgenden Dateien ein:

  • {Malware File Path}\blacksuit_log_{number} → log file
  • {Malware File Path}\PS_syslog_ → contains a list of processes with the string vmsyslogd in its name
  • {Malware File Path}\PID_ → contains PID of the executed process
  • {Malware File Path}\PS_list → contains PID of all running processes
  • {Malware File Path}\list_ → contains a list of running virtual machines

Fügt die folgenden Prozesse hinzu:

  • /bin/sh -c ps -Cc|grep vmsyslogd > PS_syslog_
  • /bin/sh -c kill -9 {PID} → terminates processes with the string vmsyslogd in its name
  • If -killvm is passed as an argument:
    • /bin/sh -c esxcli vm process list > list_
    • /bin/sh -c esxcli vm process kill --type=soft --world-id={World ID of the VM to terminate}

Andere Details

Es macht Folgendes:

  • It only encrypts VM related files by default.
  • It terminates processes with the string vmsyslogd by default.
  • Based on analysis of the codes, this malware has the following capabilities:
    • It can terminate VM processes using its World ID and VMX Cartel ID by executing the following commands:
      • /bin/sh -c lsof | egrep 'Cartel|%s' > CID_list_
      • /bin/sh -c esxcli vm process list > PID_list_
      • /bin/sh -c esxcli vm process kill --type=force --world-id={World ID or VMX Cartel ID of the VM to terminate}
    • It can drop the following files:
      • {Malware File Path}\CID_list_ → contains a list of VMX Cartel IDs
      • {Malware File Path}\PID_list_ → contains a list of running virtual machines

  Solução

Mecanismo de varredura mínima: 9.800
Primeiro arquivo padrão VSAPI: 18.424.02
Data do lançamento do primeiro padrão VSAPI: 04 maio 2023
VSAPI OPR Pattern Version: 18.425.00
VSAPI OPR Pattern veröffentlicht am: 05 maio 2023

Step 1

Durchsuchen Sie Ihren Computer mit Ihrem Trend Micro Produkt, und löschen Sie Dateien, die als Ransom.Linux.BLACKSUIT.THEODBC entdeckt werden. Falls die entdeckten Dateien bereits von Ihrem Trend Micro Produkt gesäubert, gelöscht oder in Quarantäne verschoben wurden, sind keine weiteren Schritte erforderlich. Dateien in Quarantäne können einfach gelöscht werden. Auf dieser Knowledge-Base-Seite finden Sie weitere Informationen.

Step 2

Restore encrypted files from backup.


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