Trojan.Win64.BUMBLELOADER.YXDIBZ

September 28, 2023
 Analysis by: Jayvee Mark Villaroman
 ALIASES:

Trojan:Win64/BumbleBee.ZB!MTB (MICROSOFT), Trojan-Downloader.Win64.BumbleBee.afv (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

It terminates itself if it detects it is being run in a virtual environment. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

1,181,184 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

14 Sep 2023

Payload:

Connects to URLs/IPs, Terminates processes

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 terminates itself if it finds the following processes in the affected system's memory:

  • vmtoolsd.exe
  • vmwaretray.exe
  • vmwareuser.exe
  • VGAuthService.exe
  • vmacthlp.exe
  • VMSrvc.exe
  • VMUSrvc.exe
  • qemu-ga.exe
  • vdagent.exe
  • vdservice.exe

Other Details

This Trojan terminates itself if it detects it is being run in a virtual environment.

It does the following:

  • It terminates itself if the system's MAC address starts in the following:
    • 00:05:69
    • 00:0C:29
    • 00:1C:14
    • 00:50:56
  • It terminates itself if the malware name matches the following:
    • sample.exe
    • bot.exe
    • sandbox.exe
    • malware.exe
    • test.exe
    • klvme.exe
    • myapp.exe
    • testapp.exe
    • It terminates itself if the following directories are found in the system:
      • qemu-ga
      • SPICE Guest Tools
    • It uses Domain Generation Algorithm (DGA) with ".life" TLD to connect and receive data from the following URLs:
      • https://{BLOCKED}1zeiu.life
      • https://{BLOCKED}2ot5u.life
      • https://{BLOCKED}i5kwx.life
      • https://{BLOCKED}1xnl9.life
      • https://{BLOCKED}wt1ao.life

    However, as of this writing, the said sites are inaccessible.

    It terminates itself if any of the following user name(s) are found in the affected system:

    • CurrentUser
    • Sandbox
    • Emily
    • HAPUBWS
    • Hong Lee
    • IT-ADMIN
    • Johnson
    • Miller
    • milozs
    • Peter Wilson
    • timmy
    • sand box
    • malware
    • maltest
    • test user
    • virus
    • John Doe

    It checks if the following virtual machine or sandbox related module(s) is loaded in the affected system:

    • VMWare
    • VirtualBox
    • qemu

    It takes advantage of the following exploit(s):

    It uses Windows Management Instrumentation (WMI) to do the following:

      • Detects virtualized environments by using these WMI Queries
        • SELECT * FROM Win32_NetworkAdapterConfiguration
        • SELECT * FROM Win32_NTEventlogFile
        • SELECT * FROM Win32_PnPEntity
        • SELECT * FROM Win32_PnPDevice
        • SELECT * FROM Win32_Fan

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.671.00

FIRST VSAPI PATTERN DATE:

01 Sep 2023

VSAPI OPR PATTERN File:

18.671.00

VSAPI OPR PATTERN Date:

01 Sep 2023

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:

    •  Ransom.Win32.TRX.XXPE50FFF072

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

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win64.BUMBLELOADER.YXDIBZ. 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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