Analysis by: Patrick Angelo Roderno
 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

Canal de infecção: 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.

  TECHNICAL DETAILS

Tipo de compactação: 1,092 bytes
Tipo de arquivo: Other
Residente na memória: No
Data de recebimento das amostras iniciais: 11 Jun 2019
Carga útil: Connects to URLs/IPs, Downloads files

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 drops and executes the following files:

It adds the following processes:

  • pkill -f 'mysqli_{username} -i'
  • pkill -f 'mysqlc_{username} -i'

Other System Modifications

This Trojan deletes the following files:

  • /tmp/mysqli.tar.gz -> older version of the malware

It deletes the following folders:

  • /tmp/.mysqli -> older version of the malware

Download Routine

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

  • http://m.{BLOCKED}store.com/images/qrcode/1414297571.jpg

It saves the files it downloads using the following names:

  • /tmp/mysqli.tar.gz

Other Details

This Trojan does the following:

  • The downloaded file (/tmp/mysqli.tar.gz) is extracted to drop a folder named /tmp/.mysqli, containing all the component files of the malware.

  SOLUTION

Mecanismo de varredura mínima: 9.850
Primeiro arquivo padrão VSAPI: 15.186.02
Data do lançamento do primeiro padrão VSAPI: 20 Jun 2019
VSAPI OPR Pattern Version: 15.183.00
VSAPI OPR Pattern veröffentlicht am: 21 Jun 2019

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.SQUELL.CC. 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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