Analysis by: Noel Anthony Llimos
ALIASES:

Downloader.Trojan (Norton)

 PLATFORM:

Linux

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

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

It executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size: 368 bytes
File Type: Script
Memory Resident: No
Initial Samples Received Date: 16 Jul 2018
Payload: Connects to URLs/IPs

Arrival Details

This Trojan 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 Trojan executes then deletes itself afterward.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.189.149

Other Details

This Trojan does the following:

  • It modifies the downloaded file (detected as ELF_MIRAI.LBOUG) to have read, write and execute permission to all files and folders found in the infected system.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.382.04
FIRST VSAPI PATTERN DATE: 16 Jul 2018
VSAPI OPR PATTERN File: 14.383.00
VSAPI OPR PATTERN Date: 17 Jul 2018

Scan your computer with your Trend Micro product to delete files detected as UNIX_MIRAI.DLDS. 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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