TrojanSpy.Win64.BASTRECON.A

 Analysis by: Neljorn Nathaniel Aguas

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • 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 gathers certain information on the affected computer.

  TECHNICAL DETAILS

File Size:

1,846,784 bytes

File Type:

DLL

Initial Samples Received Date:

05 Nov 2024

Payload:

Steals 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.

Installation

This Trojan Spy adds the following processes:

  • cmd.exe /c systeminfo
  • cmd.exe /c route print
  • cmd.exe /c ipconfig /all

Information Theft

This Trojan Spy gathers the following information on the affected computer:

  • User Credentials
  • Host Name
  • Domain
  • Logon Server
  • OS Information
  • System Manufacturer
  • System Model
  • System Type
  • Processor Information
  • BIOS Version
  • Total/Available Physical Memory
  • Total/Available/In Use Virtual Memory
  • Pagefile Location(s)
  • Hotfixes Installed
  • Network Card Information
  • IPv4 Route Table
  • IPv6 Route Table
  • Windows Directory
  • System Directory
  • Boot Device
  • System Locale
  • Input Locale
  • Time Zone

Stolen Information

This Trojan Spy saves the stolen information in the following file:

  • %User Temp%\qwertyuio.txt

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan Spy does the following:

  • It opens a window with the following title name that asks for the user credential:
    • Filter update

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.698.09

FIRST VSAPI PATTERN DATE:

06 Nov 2024

VSAPI OPR PATTERN File:

19.699.00

VSAPI OPR PATTERN Date:

07 Nov 2024

Step 1

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 2

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 3

Search and delete this file

[ Learn More ]
There may be some 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.  
  • %User Temp%\qwertyuio.txt

Step 4

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win64.BASTRECON.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:


Did this description help? Tell us how we did.