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Trojan.AutoIt.VICTORYGATE.A

January 11, 2023
 Analysis by: Ricardo III Valdez
 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.

  TECHNICAL DETAILS

File Size:

864,256 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Dec 2022

Payload:

Executes 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.

Other Details

This Trojan does the following:

  • This executable file contains a script that automates the following steps in establishing a remote connection using VNC Viewer:
    • Fetch session parameters
    • Execution of VNC Viewer application
    • Accepting EULA
    • Confirming and closing pop-up windows
    • Input the VNC Server address
    • Connect to the VNC Server address
    • Accepting unverified signature/identity from the VNC server
    • Log in credentials for authentication
  • This script gathers the following session properties:
    • Logon account username
    • Logon account pasword
    • Target address ← VNC Server
    • Target username
    • Target password
  • This script executes the following files:
    • E:\PSM Activity\Real VNC\VNC-Viewer-6.19.1115-Windows-64bit-standalone.exe

It accepts the following parameters:

  • /ErrorStdOut
  • /AutoIt3OutputDebug
  • /AutoIt3ExecuteLine
  • /AutoIt3ExecuteScript
  • /{Commands mentioned above} /test

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.184.06

FIRST VSAPI PATTERN DATE:

09 Jan 2023

VSAPI OPR PATTERN File:

18.185.00

VSAPI OPR PATTERN Date:

10 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.XXPE50FSX029

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

Identify and terminate files detected as Trojan.AutoIt.VICTORYGATE.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 5

Scan your computer with your Trend Micro product to delete files detected as Trojan.AutoIt.VICTORYGATE.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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