Trojanspy.MSIL.DISCOSTEALER.A

January 25, 2023
 Analysis by: Melvin Jhun Palbusa
 ALIASES:

Trojan:MSIL/LibeRAT.A!MTB (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It steals sensitive information such as user names and passwords related to certain games.

It connects to certain websites to send and receive information. It terminates itself if it detects it is being run in a virtual environment.

  TECHNICAL DETAILS

File Size:

42,496 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Jan 2023

Payload:

Connects to URLs/IPs, Steals information, Collects system information

Arrival Details

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Information Theft

This Trojan Spy steals sensitive information such as user names and passwords related to the following games:

  • Roblox
  • Minecraft

It gathers the following data:

  • Gathers the following System information:
    • IP Address
    • City
    • Country
    • Country Code
    • ISP
    • Region Name
    • Time Zone
    • ZIP
    • OS Information
    • Processor Information
    • GPU Information
    • Disk
    • Memory
    • Product Key
  • Gathers information from:
    • Browser(Password and Cookies):
      • Opera browser
      • Google Chrome
      • Brave browser
      • Yandex Browser
    • Others:
      • Discord
      • discordcanary

It captures screenshots of the victim’s machines and saves it to an image file named:

  • Capture.jpg

Other Details

This Trojan Spy connects to the following URL(s) to get the affected system's IP address:

  • http://ip4.{BLOCKED}p.org
  • http://{BLOCKED}i.com/json/

It connects to the following website to send and receive information:

  • https://discord.com/api/webhooks/{BLOCKED}6855968/oSnr3g518qYYd3pIPxXjHznKhe6nWEOT4kqQ6p2F43dx06xhMXkdEnVzWQ704aEhb_ML

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

It does the following:

  • Checks for the presence of known sandbox IDs in the following registry keys:
    • HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\Scsi\Scsi Port 2\ Scsi Bus 0\Target Id 0\Logical Unit Id 0\Identifier
    • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\SCSI\Disk&Ven_VMware_&Prod_VMware_Virtual_S
    • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\CriticalDeviceDatabase\root#vmwvmcihostdev
    • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\VirtualDevice\Drivers
    • HKEY_LOCAL_MACHINE\SOFTWARE\VMWare, Inc.\VMWare Tools
    • HKEY_LOCAL_MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions
    • HKEY_LOCAL_MACHINE\HARDWARE\ACPI\DSDT\VBOX_
    • HKEY_LOCAL_MACHINE\System\ControlSet001\Services\Disk\Enum\0
    • HKEY_LOCAL_MACHINE\HARDWARE\Description\System\SystemBiosInformation
    • HKEY_LOCAL_MACHINE\HARDWARE\Description\System\VideoBiosVersion
    • HKEY_LOCAL_MACHINE\HARDWARE\Description\System\SystemManufacturer
    • HKEY_LOCAL_MACHINE\HARDWARE\Description\System\SystemProductName
    • HKEY_LOCAL_MACHINE\HARDWARE\Description\System\Logical Unit Id 0
    where the sandbox IDs could be any of the following:
    • vmware
    • virtualbox
    • vbox
    • qemu
    • xen
    If found, it terminates itself

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.188.02

FIRST VSAPI PATTERN DATE:

11 Jan 2023

VSAPI OPR PATTERN File:

18.189.00

VSAPI OPR PATTERN Date:

12 Jan 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:

    • TROJ.Win32.TRX.XXPE50FFF064

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

Scan your computer with your Trend Micro product to delete files detected as Trojanspy.MSIL.DISCOSTEALER.A. 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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