Analysis by: Nathaniel Gregory Ragasa
ALIASES:

UDS:Backdoor.MSIL.Androm.gen(KASPERSKY)

 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

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.

  TECHNICAL DETAILS

File Size: 514,698 bytes
File Type: EXE
Memory Resident: No

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 and executes the following files:

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

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

It adds the following processes:

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

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

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • {BLOCKED}vgeah26.{BLOCKED}e.com

It does the following:

  • After execution, renamed the dropped file from %Windows%\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe → %Application Data%\{Random Character}\{Random Character}.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).)

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 17.784.05
FIRST VSAPI PATTERN DATE: 31 Aug 2022
VSAPI OPR PATTERN File: 17.785.00
VSAPI OPR PATTERN Date: 01 Sep 2022

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.  
  • %Windows%\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  • %Application Data%\{Random Character}\{Random Character}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.LOKI.PUHBAZCRCQJG. 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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