Analysis by: Thea Patrice Tajonera
 ALIASES:

N/A

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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 executes then deletes itself afterward.

  TECHNICAL DETAILS

Tipo de compactação: 858 bytes
Tipo de arquivo: BAT
Residente na memória: No
Data de recebimento das amostras iniciais: 21 Jun 2021

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:

  • net share C=C:\ /grant:everyone,FULL
  • net share D=D:\ /grant:everyone,FULL
  • net share E=E:\ /grant:everyone,FULL
  • net share F=F:\ /grant:everyone,FULL
  • net share G=G:\ /grant:everyone,FULL
  • net share H=H:\ /grant:everyone,FULL
  • net share I=I:\ /grant:everyone,FULL
  • net share J=J:\ /grant:everyone,FULL
  • net share L=L:\ /grant:everyone,FULL
  • net share K=K:\ /grant:everyone,FULL
  • net share M=M:\ /grant:everyone,FULL
  • net share X=X:\ /grant:everyone,FULL
  • net share Y=Y:\ /grant:everyone,FULL
  • net share W=W:\ /grant:everyone,FULL
  • net share Z=Z:\ /grant:everyone,FULL
  • net share V=V:\ /grant:everyone,FULL
  • net share O=O:\ /grant:everyone,FULL
  • net share P=P:\ /grant:everyone,FULL
  • net share Q=Q:\ /grant:everyone,FULL
  • net share R=R:\ /grant:everyone,FULL
  • net share S=S:\ /grant:everyone,FULL
  • net share T=T:\ /grant:everyone,FULL

It executes then deletes itself afterward.

  SOLUTION

Mecanismo de varredura mínima: 9.800
Primeiro arquivo padrão VSAPI: 16.794.08
Data do lançamento do primeiro padrão VSAPI: 21 Jun 2021
VSAPI OPR Pattern Version: 16.795.00
VSAPI OPR Pattern veröffentlicht am: 22 Jun 2021

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

Scan your computer with your Trend Micro product to delete files detected as Trojan.BAT.SHARNET.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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