Analysis by: Johnlery Triunfante
 Modified by: Rheniel Rhay Ramos
 ALIASES:

Backdoor:Win32/Floxif (MICROSOFT); W32/HackedCCleaner.FAF7!tr (FORTINET)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Canal de infecção: Dropped by other malware, Downloaded from the Internet

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

Tipo de compactação: 9,791,816 bytes
Tipo de arquivo: EXE
Residente na memória: No
Data de recebimento das amostras iniciais: 15 Aug 2017
Carga útil: Drop files

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be manually installed by a user.

Installation

This Backdoor drops and executes the following files:

  • %Program Files%\CCleaner\CCleaner.exe -> detected as BKDR_CCHACK.A

Propagation

This Backdoor does not have any propagation routine.

Backdoor Routine

This Backdoor does not have any backdoor routine.

NOTES:

This is a Trend Micro detection for an installer containing a compromised CCleaner application.

  SOLUTION

Mecanismo de varredura mínima: 9.850
Primeiro arquivo padrão VSAPI: 13.682.03
Data do lançamento do primeiro padrão VSAPI: 26 Sep 2017
VSAPI OPR Pattern Version: 13.683.00
VSAPI OPR Pattern veröffentlicht am: 27 Sep 2017

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

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

Remove BKDR_CCHACK.B by using its own Uninstall option

[ Learn More ]
To uninstall the grayware process

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_CCHACK.B. 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 this Knowledge Base page for more information.


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