Analysis by: Arvin Roi Macaraeg
ALIASES:

N/A

 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

Canal de infección Downloaded from the Internet

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.

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

Tamaño del archivo 390,442 bytes
Tipo de archivo DLL
Residente en memoria No
Fecha de recepción de las muestras iniciales 18 Dec 2018

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 processes:

  • %Windows%\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe <- For 32bit System
  • %Windows%\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe <- For 64bit System

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Other Details

This Trojan does the following:

  • The Trojan decrypts each files in the directory(C:\Windows\Microsoft.NET) and searches for the string client. Once the file is found, the code is decrypted and be executed.
  • This Trojan checks if the file is executed using svchost.
  • This Trojan checks if it is running as a service.

It does not exploit any vulnerability.

  SOLUTION

Motor de exploración mínimo 9.850
Primer archivo de patrones de VSAPI 15.326.04
Primera fecha de publicación de patrones de VSAPI 27 Aug 2019
Versión de patrones OPR de VSAPI 15.327.00
Fecha de publicación de patrones OPR de VSAPI 28 Aug 2019

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.XXPE50FFF031

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.Win64.RAVEN.AM

[ Learn More ]
  1. 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.
  2. 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.Win64.RAVEN.AM. 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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