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Trojan.BAT.SHARNET.A

July 01, 2021
 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

File Size:

858 bytes

File Type:

BAT

Memory Resident:

No

Initial Samples Received Date:

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

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

16.794.08

FIRST VSAPI PATTERN DATE:

21 Jun 2021

VSAPI OPR PATTERN File:

16.795.00

VSAPI OPR PATTERN Date:

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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