Backdoor.Linux.TSUNAMI.YXBLM

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

Se conecta a servidores de IRC. Ejecuta comandos desde un usuario remoto malicioso que pone en peligro el sistema afectado.

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:

• .bawtz -> Used as mutex

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

• /dev/shm/{Malware Filename}
• /var/tmp/{Malware Filename}
• /var/lock/{Malware Filename}
• /var/lock/{Malware Filename}
• /root/{Random Characters}

Agrega los procesos siguientes:

• /bin/uname
• /bin/nvram or /usr/sbin/nvram
• /etc/ISP_name
• /etc/Model_name

Rutina de puerta trasera

Se conecta a alguno de los siguientes servidores de IRC:

• {BLOCKED}.{BLOCKED}.155.72
• {BLOCKED}.{BLOCKED}.165.21
• {BLOCKED}.{BLOCKED}.230.55

Se une a los canales de IRC siguientes:

• #redis

Ejecuta los comandos siguientes desde un usuario remoto malicioso:

• PAN - Performs an advanced SYN flood to a specific target at n seconds interval.
• UDP - Performs a UDP flood to a specific target at n seconds interval.
• HTTP - Perform a HTTP flood.
• STD - Triggers the bot to perform a denial of service (DoS) attack and also allows user to specify .
• UNKNOWN - Another non-spoof udp flooder
• KILL - Kill the running client.
• KILL_PORT - Kill a listener socket.
• GET - This downloads from and saves a file.
• SSHX <192 or 192.168 or 192.168.0> - Perform a SSH scan with provided credentials.
• SSH <192 or 192.168 or 192.168.0> - Perform a SSH scan.
• KILLALL - Kill all current packeting.
• HELP - Displays this.
• CBACK - Connect back to .
• IRC - Send commands to the IRC server.
• SH - Execute shell commands.

Robo de información

Recopila los siguientes datos:

• Username
• Network Information
• Operating System Information
• Kernel Version
• System Hardware

Otros detalles

Hace lo siguiente:

• Adds the following crontab entries to enable its automatic execution at every minute:
  • crontab * * * * * /{Malware Path}/{Malware Filename}> /dev/null 2>&1 &
  • crontab * * * * * /{Copy Path}/{Malware Filename}> /dev/null 2>&1 &
• It does not continue with its routines if the following processes are running:
  • strace
  • tcpdump