Analysis by: Joshua Paul Ignacio
ALIASES:

Trojan.Win32.Miner.bde (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Coinminer may be dropped by other malware.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size: 7,586,816 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 31 Mar 2020
Payload: Connects to URLs/IPs, Steals information

Arrival Details

This Coinminer may be dropped by the following malware:

Installation

This Coinminer adds the following folders:

  • {Malware Path}\Tor → where the file components of the coinminer and the coinminer application itself is located

It drops the following files:

  • {Malware Path}\mn.pid
  • {Malware Path}\sys_desktop.ini
  • {Malware Path}\system.ini
  • {Malware Path}\upd.version
  • {Malware Path}\Tor.tmp → contains the Tor component files

It adds the following processes:

  • "{Malware Path}\{Malware Filename}.exe" 7z e -p"DxSqsNKKOxqPrM4Y3xeK" "{Malware Path}\Tor.tmp" -o"{Malware Directory}\Tor\"
  • "{Malware Path}\Tor\tor.exe" -f TorConfig
  • "%System%\attrib.exe" -o stratum+tcp://pool.supportxmr.com:3333 -u 4JUdGzvrMFDWrUUwY3toJATSeNwjn54LkCnKBPRzDuhzi5vSepHfUckJNxRL2gjkNrSqtCoRUrEDAgRwsQvVCjZbS1u9gUUcninRWEA9Rf -p x -t 1

It injects codes into the following process(es):

  • %System%\attrib.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Coinminer deletes the following folders:

  • {Malware Path}\Tor

Download Routine

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

  • http://{BLOCKED}sv5polou6uu5isu6dbn7jirdkcgo3ybjghclpcre5hzonybhad.onion/public/upd.txt
  • http://{BLOCKED}p6f4w23r2g375l6ndbbz7i5uwg7i7j5idieeoqksuwm4wy57yd.onion/public/upd.txt
  • http://{BLOCKED}vdvfcpkz7gl23kmkep5xtajau3ghxtswur6q5bznnpmfam3iqd.onion/public/upd.txt
  • http://{BLOCKED}gftahnjzrazdstn2uwykuxuclosht46fnbwlcsjj4zaulomlad.onion/public/upd.txt

It saves the files it downloads using the following names:

  • {Malware Directory}\SysBackup.txt

Information Theft

This Coinminer gathers the following data:

  • System Information
  • OS Version
  • Video Controller
  • Processors
  • AV product
  • SmartScreen
  • Windows Defender

Other Details

This Coinminer connects to the following website to send and receive information:

  • https://{BLOCKED}o.co/1O5aW
  • bt-web.ti.{BLOCKED}h.ch:9001
  • {BLOCKED}.{BLOCKED}.101.32:20032
  • tor-readme.{BLOCKED}erver.de:9001
  • {BLOCKED}.{BLOCKED}.101.6:20006
  • {BLOCKED}.{BLOCKED}.33.248:36851

It checks for the presence of the following process(es):

  • aida64.exe
  • AnVir.exe
  • anvir64.exe
  • GPU-Z.exe
  • HWiNFO32.exe
  • HWiNFO64.exe
  • i7RealTempGT.exe
  • OpenHardwareMonitor.exe
  • pchunter64.exe
  • perfmon.exe
  • ProcessHacker.exe
  • ProcessLasso.exe
  • procexp.exe
  • procexp64.exe
  • RealTemp.exe
  • RealTempGT.exe
  • speedfan.exe
  • SystemExplorer.exe
  • taskmgr.exe
  • VirusTotalUpload2.exe

It accepts the following parameters:

  • -SystemCheck
  • -SystemCheck91137

It checks for the presence of the following antivirus and security applications:

  • AvastUI.exe
  • AvastSvc.exe
  • Avast
  • egui.exe
  • ekrn.exe
  • NOD
  • avp.exe
  • avpui.exe
  • Kaspersky
  • avguix.exe
  • AVGUI.exe
  • AVG
  • dwengine.exe
  • Dr.web
  • MBAMService.exe
  • Malwarebytes

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.776.04
FIRST VSAPI PATTERN DATE: 31 Mar 2020
VSAPI OPR PATTERN File: 15.777.00
VSAPI OPR PATTERN Date: 01 Apr 2020

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Troj.Win32.TRX.XXPE50FFF034

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
  • {Malware Path}\SysBackup.txt
  • {Malware Path}\mn.pid
  • {Malware Path}\sys_desktop.ini
  • {Malware Path}\system.ini
  • {Malware Path}\upd.version
  • {Malware Path}\Tor.tmp

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Coinminer.Win64.MOOZ.THCCABO. 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 this Knowledge Base page for more information.


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