Analysis by: Maria Emreen Viray
 ALIASES:

INF/AutoRun!tr (FORTINET)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes


  TECHNICAL DETAILS

Tipo de compactação: 244 bytes
Tipo de arquivo: INF
Residente na memória: No
Data de recebimento das amostras iniciais: 10 May 2022

Installation

This Trojan adds the following processes:

  • {Drive Letter}\SYSTEM\FOLDER\AmdSys.exe

Propagation

The said .INF file contains the following strings:

[autorun]
open=SYSTEM\FOLDER\AmdSys.exe
�������Ύ��Ɔ

Nod32 Has Checked This File For Malwares ANd File Scan Result is Clean.
action=Open folder to view files
shell\open=Open
shell\open\command=SYSTEM\FOLDER\AmdSys.exe
shell\open\default=1

  SOLUTION

Mecanismo de varredura mínima: 9.800
Primeiro arquivo padrão VSAPI: 17.556.04
Data do lançamento do primeiro padrão VSAPI: 10 May 2022
VSAPI OPR Pattern Version: 17.557.00
VSAPI OPR Pattern veröffentlicht am: 11 May 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 AUTORUN.INF files created by Trojan.INF.BIFROSE.A that contain these strings

[ Learn More ]
[autorun] open=SYSTEM\FOLDER\AmdSys.exe �������Ύ��Ɔ Nod32 Has Checked This File For Malwares ANd File Scan Result is Clean. action=Open folder to view files shell\open=Open shell\open\command=SYSTEM\FOLDER\AmdSys.exe shell\open\default=1

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.INF.BIFROSE.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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