Analysis by: Karen Ivy Titiwa
 PLATFORM:

Linux

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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: 2,830 bytes
File Type: Script
Memory Resident: Yes
Initial Samples Received Date: 04 May 2020

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 adds the following processes:

  • /usr/local/bin/tntrecht -i /usr/local/bin/tntrecht
  • /usr/local/bin/tntrecht -i /usr/local/sbin/blue
  • /usr/local/bin/tntrecht +i /bin/hid
  • /usr/local/bin/tntrecht {+ or -}i /usr/bin/myip
  • /usr/local/bin/tntrecht -i /usr/bin/bioset
  • /usr/local/bin/tntrecht -i /usr/local/bin/logs
  • /usr/local/bin/tntrecht -i /usr/bin/pu

Other System Modifications

This Trojan deletes the following files:

  • /usr/local/bin/logs.c

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/chattr
  • http://{BLOCKED}t.red/load/module/blue
  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/pnscan.tar.gz
  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/bioset
  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/logs.c
  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/punk

It saves the files it downloads using the following names:

  • /usr/bin/chattr
  • /usr/local/sbin/blue
  • /tmp/pnscan.tar.gz
  • /usr/bin/bioset
  • /usr/local/bin/logs.c
  • /usr/bin/pu

Other Details

This Trojan does the following:

  • Compiles the downloaded file, "logs.c" using GNU Compiler Collections(GCC) and stores it to /usr/local/bin/logs

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.850.01
FIRST VSAPI PATTERN DATE: 05 May 2020
VSAPI OPR PATTERN File: 15.851.00
VSAPI OPR PATTERN Date: 06 May 2020

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.HADGLIDER.F. 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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