Analysis by: Leidryn Saludez
ALIASES:

Win32:Evo-gen [Trj] (AVAST)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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: 6,401,596 bytes
File Type: EXE
Initial Samples Received Date: 19 Dec 2024
Payload: Connects to URLs/IPs, Modifies system registry, Terminates processes

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.

Installation

This Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

  • winrar8PROMEMEKGAmaV3_2_8

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • ollydbg.exe
  • processhacker.exe
  • tcpview.exe
  • filemon.exe
  • procmon.exe
  • regmon.exe
  • procexp.exe
  • ida.exe
  • ida64.exe
  • binaryninja.exe
  • immunitydebugger.exe
  • wireshark.exe
  • dumpcap.exe
  • hookexplorer.exe
  • importrec.exe
  • petools.exe
  • lordpe.exe
  • sysinspector.exe
  • proc_analyzer.exe
  • sysanalyzer.exe
  • sniff_hit.exe
  • windbg.exe
  • joeboxcontrol.exe
  • joeboxserver.exe
  • apimonitor.exe
  • apimonitor-x86.exe
  • apimonitor-x64.exe
  • x32dbg.exe
  • x64dbg.exe
  • x96dbg.exe
  • cheatengine.exe
  • scylla.exe
  • charles.exe
  • cheatengine-x86_64.exe
  • reclass.net.exe

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.{BLOCKED}..33/thebig/stail.exe
  • http://{BLOCKED}mpar-auto-orice-tip.ro/downloads/67065227a0640_rrrrrrrr.exe
  • http://{BLOCKED}ernisar.com/lopsa/67057ae45a898_swe_received.exe
  • http://{BLOCKED}iteterbaru.xyz/css/54f0fa329a53.exe
  • http://{BLOCKED}nmccrea.com/web/67079aecc452b_xin.exe

Other Details

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\dmdsaodgmarksmdkgsa

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 19.786.02
FIRST VSAPI PATTERN DATE: 19 Dec 2024
VSAPI OPR PATTERN File: 19.787.00
VSAPI OPR PATTERN Date: 20 Dec 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

Delete this registry key

[ 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.

 
  • HKEY_CURRENT_USER\SOFTWARE\dmdsaodgmarksmdkgsa

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.RISELOADER.THLAIBD. 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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