Analysis by: Bren Matthew Ebriega
ALIASES:

Trojan:MSIL/CryptInject!MTB (MICROSOFT); W32/GenKryptik.DQLV!tr (FORTINET)

 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: Dropped by other malware, Downloaded from the Internet

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 executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

File Size: 1,267,712 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 26 Feb 2020
Payload: Connects to URLs/IPs, 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 drops the following files:

  • %Application Data%\Windata\svchosts.exe

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

It adds the following processes:

  • %Windows%\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

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

It creates the following folders:

  • %Application Data%\Windata\

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

It injects codes into the following process(es):

  • %Windows%\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

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

Autostart Technique

This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
HIDGOD = "%Application Data%\Windata\svchosts.exe"

Backdoor Routine

This Trojan Spy executes the following commands from a remote malicious user:

  • Take Screenshots
  • Operate Webcam
  • Change Desktop Wallpaper
  • Operate CD Drive
  • Zip/Unzip Files
  • Download/Execute/Copy/Upload Files
  • Operate Windows
  • Operate Mouse
  • Execute/Kill Process
  • Operate Clipboard
  • Operate CMD
  • Shutdown/LogOff/Reboot
  • Log Keystrokes
  • Play Sounds

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • 888myrat.{BLOCKED}s.org:4000

Information Theft

This Trojan Spy gathers the following data:

  • Username
  • OS Version
  • System Architecture
  • Screen Resolution
  • All Drives
  • Running Processes
  • CPU Model
  • Computer Name
  • Time Zone
  • Computer Time
  • Installed Programs
  • Keyboard Layout
  • Network Information
  • Wlan Profiles
  • Firewall Settings
  • Browser Cookies, Credentials, Profiles of the following browsers:
    • Firefox
    • Opera
    • Chrome
  • FTP Credentials
    • Filezilla
  • Installed Antivirus

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.250.04
FIRST VSAPI PATTERN DATE: 26 Feb 2020
VSAPI OPR PATTERN File: 15.251.00
VSAPI OPR PATTERN Date: 27 Feb 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.XXPE50FLM009

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

Identify and terminate files detected as TrojanSpy.MSIL.AZORULT.AG

[ 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 6

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\HIDGOD
    • %Application Data%\Windata\svchosts.exe

Step 7

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.  
  • %Application Data%\Windata\

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.MSIL.AZORULT.AG. 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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