Backdoor.Linux.XORDDOS.B

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

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

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

• /bin/{random character}

Técnica de inicio automático

Infiltra los archivos siguientes:

• /etc/cron.hourly/{random character}.sh (Cron is a time-based job scheduler in Unix-like computer operating systems)

Rutina de puerta trasera

Ejecuta los comandos siguientes desde un usuario remoto malicioso:

• Execute files
• Download files
• Update Malware
• Delete Files
• Terminate Process
• Remove Services
• Remove Self
• Perform DDoS attack
• Hide Files
• Create Services
• Create Directory
• Hide Port
• Copy Files

Publica la siguiente información en su servidor de mando y control (C&C):

• {BLOCKED}.{BLOCKED}.111.129:80
• {BLOCKED}.{BLOCKED}.111.130:80
• {BLOCKED}.{BLOCKED}.111.131:80
• {BLOCKED}.{BLOCKED}.126.236:80
• {BLOCKED}.{BLOCKED}.126.237:80
• {BLOCKED}.{BLOCKED}.126.238:80
• {BLOCKED}.{BLOCKED}.126.239:80
• kill{BLOCKED}fly.com
• p6.s{BLOCKED}.net
• p6.f{BLOCKED}9.com

Robo de información

Recopila los siguientes datos:

• Memory Information
• CPU Information
• Network Speed
• PID of Running Process
• MD5 of Running Process

Otros detalles

Hace lo siguiente:

• Drops a shell script in /etc/init.d/{random characters} folder which setups the auto-start mechanism of the malware.
• Creates symbolic links which points to the script in /etc/init.d/{random characters}:
  • /etc/rc{1-5}.d/S90{random numbers}
  • /etc/rc.d/rc{1-5}.d/S90{random numbers}
• Read the following from its configuration file:
  • md5 - checksum of file
  • denyip - open communication with an IP
  • filename - list of filename
  • rmfile - files to remove
• Uses the following User Agents:
  • POST %s HTTP/1.1
    Accept:
    Accept-Language: zh-cn
    User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; TencentTraveler ; .NET CLR 1.1.4322)
    Host:
    Content-Type: application/x-www-form-urlencoded
    Content-Length:
    Connection: Keep-Alive
  • GET %s HTTP/1.1
    Accept: */*
    Accept-Language: zh-cn
    User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; TencentTraveler ; .NET CLR 1.1.4322)
    Host:
    Connection: Keep-Alive
  • GET %s HTTP/1.1
    Accept: */*
    Accept-Language: en
    User-Agent:Wget/1.12 (linux-gnu)
    Host:
    Connection: Keep-Alive