Analysis by: Johnlery Triunfante
 PLATFORM:

Linux, UNIX

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • 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: 562,317 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 26 Jul 2018

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 files:

  • {Malware File Path}\{Random Filename}.sh

It drops the following copies of itself into the affected system:

  • {Malware File Path}\{Random Filename}

Autostart Technique

This Backdoor drops the following files:

  • /etc/cron.hourly/{Random Filename}.sh
  • /etc/init.d/{Random Filename}
  • /etc/rc{1-5}.d/S90{Random Filename}
  • /etc/rc.d/rc{1-5}.d/S90{Random Filename}

Other Details

This Backdoor connects to the following possibly malicious URL:

  • k1.{BLOCKED}.com
  • p7.{BLOCKED}.net

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.404.06
FIRST VSAPI PATTERN DATE: 26 Jul 2018
VSAPI OPR PATTERN File: 14.405.00
VSAPI OPR PATTERN Date: 27 Jul 2018

Scan your computer with your Trend Micro product to delete files detected as ELF_XORDDOS.TNT. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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