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Trojan.SH.SQUELL.CC

June 20, 2019
 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

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.

  TECHNICAL DETAILS

File Size:

1,092 bytes

File Type:

Other

Memory Resident:

No

Initial Samples Received Date:

11 Jun 2019

Payload:

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

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.186.02

FIRST VSAPI PATTERN DATE:

20 Jun 2019

VSAPI OPR PATTERN File:

15.183.00

VSAPI OPR PATTERN Date:

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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