PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application 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

Tipo de compactação: 5,177,344 bytes
Tipo de arquivo: EXE
Residente na memória: Yes
Data de recebimento das amostras iniciais: 30 Apr 2020

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application creates the following folders:

  • %All Users Profile%\AVAST Software\Persistent Data
  • %All Users Profile%\AVAST Software\Persistent Data\Avast
  • \.\%All Users Profile%\AVAST Software
  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

Other System Modifications

This Potentially Unwanted Application adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
AVAST Software
SymbolicLinkValue = "{random characters}"

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs\Clear.log.tmp.{GUID}
  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs\Clear.log

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

This report is generated via an automated analysis system.

  SOLUTION

Mecanismo de varredura mínima: 9.850

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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AVAST Software
    • SymbolicLinkValue = "{random characters}"

Step 3

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs\Clear.log.tmp.{GUID}
  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs\Clear.log

Step 4

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %All Users Profile%\AVAST Software\Persistent Data
  • %All Users Profile%\AVAST Software\Persistent Data\Avast
  • \.\%All Users Profile%\AVAST Software
  • %All Users Profile%\AVAST Software\Persistent Data\Avast\Logs

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.SlimWare.AN. 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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