Analysis by: Johnlery Triunfante
ALIASES:

Linux/DDoS-BH (Sophos); HEUR:Trojan-DDoS.Linux.Xarcen.d (Kaspersky); Linux.Xorddos (Norton); DoS:Linux/Xorddos!rfn (Microsoft); ELF/Xorddos.D!tr (Fortinet)

 PLATFORM:

Linux

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Backdoor 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: 562,338 bytes
File Type: ELF
Initial Samples Received Date: 14 Nov 2017

Arrival Details

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

Installation

This Backdoor drops the following copies of itself into the affected system:

  • /bin/{random 11 characters}

It drops the following files:

  • /bin/{random 11 characters}.sh

Autostart Technique

This Backdoor drops the following files:

  • /etc/cron.hourly/{string}.sh
  • /etc/init.d/{script file name}
  • /etc/rc{1-5}.d/S90{script file name}

Other Details

This Backdoor connects to the following possibly malicious URL:

  • k1.{BLOCKED}y.com
  • p10.{BLOCKED}4.net