Analysis by: Joshua Paul Ignacio
ALIASES:

BV:Downloader-AHF [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: 1,072 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 26 Dec 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.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED.{BLOCKED}.242.138/bins/xtc.arm4
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.arm5
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.i586
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.i686
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.m68k
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.mips
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.mpsl
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.ppc
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.sh4
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.spc
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.x86
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.mips64
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.arm6
  • http://{BLOCKED}.{BLOCKED}.242.138/bins/xtc.i486

It saves the files it downloads using the following names:

  • {Malware Path}\xtc.arm4
  • {Malware Path}\xtc.arm5
  • {Malware Path}\xtc.i586
  • {Malware Path}\xtc.i686
  • {Malware Path}\xtc.m68k
  • {Malware Path}\xtc.mips
  • {Malware Path}\xtc.mpsl
  • {Malware Path}\xtc.ppc
  • {Malware Path}\xtc.sh4
  • {Malware Path}\xtc.spc
  • {Malware Path}\xtc.x86
  • {Malware Path}\xtc.mips64
  • {Malware Path}\xtc.arm6
  • {Malware Path}\xtc.i486

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.590.04
FIRST VSAPI PATTERN DATE: 18 Dec 2019
VSAPI OPR PATTERN File: 15.591.00
VSAPI OPR PATTERN Date: 19 Dec 2019

Scan your computer with your Trend Micro product to clean files detected as Trojan.SH.BASHDLOD.AMI. 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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