Analysis by: Hazel Ann Poligratis
ALIASES:

BAT/Qhost.NTH (ESET-NOD32), Trojan.BAT.Qhost.abp (Kaspersky), Trojan:BAT/QHosts (Microsoft)

 PLATFORM:

Windows

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

  • 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.

  TECHNICAL DETAILS

File Size: 33,280 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 19 Jun 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.

HOSTS File Modification

This Trojan adds the following strings to the Windows HOSTS file:

  • 127.0.0.1 genuine.microsoft.com
  • 127.0.0.1 mpa.one.microsoft.com
  • 127.0.0.1 sls.microsoft.com

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.326.04
FIRST VSAPI PATTERN DATE: 19 Jun 2018
VSAPI OPR PATTERN File: 14.327.00
VSAPI OPR PATTERN Date: 20 Jun 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove these strings added by the malware/grayware/spyware in the HOSTS file

[ Learn More ]
    • 127.0.0.1 genuine.microsoft.com
    • 127.0.0.1 mpa.one.microsoft.com
    • 127.0.0.1 sls.microsoft.com

Step 3

Scan your computer with your Trend Micro product to clean files detected as TROJ_QHOST.HZL. 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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