>>> infected CCleaner 
I have been following and reading your news about the security incident with Ccleaner , but I have the following doubts: 

1- My system does not have a restore point on or before August 15, 2012, now what? 

2 - I read on other sites that a Cisco expert stated that the malware was not "turned on / activated" it was only in a data collection phase and was properly disabled. But how is this possible, disable malware? (this would only be possible for the user or the criminal, right?) 

3- Why does Avast only recommend updating Ccleaner without any form of removal or disinfection? The threat will remain in the system, will not it? 

4 - MBAM detected that Ccleaner 5.33 was infected on 9/17/2017, but I did not remove it through MBAM, I uninstalled Ccleaner manually and removed all folders and traces, then rebooted the system and executed a complete scan with MBAM and nothing was found. I believe that because this malware is unknown, I may still be compromised due to some kind of malware process, correct? 
Henrique 

Henry, come on, 

1. If you do not feel comfortable following the system after virus contamination, it is best to reinstall the operating system and all other programs. If you follow good security practices, you should already have a backup of your files. If you use Windows 10, reinstalling Windows is fairly easy and you can access it from Settings> Updates and Security. 

2. This is quite questionable. It is not possible to know exactly how the infected CCleaner behaved on all the computers that ran it, because the behavior depended on an order from the remote server. It is possible that different malicious codes have been distributed to different computers. For now, there is no evidence of major damage or distinct viruses, but that does not mean that something bigger has not happened. 

I'll use another example to make it easier to understand. There are so-called "watering hole" attacks, in which an attacker attacks an internet site that will be visited by his victim. When the victim visits the site, the code embedded by the attacker tries to infect the computer. 

However, the code, before infecting the machine completely, tries to ensure that the target system is actually the target and not another visitor. This reduces the exposure of the virus to security programs, increasing the chances of it going unnoticed. 

Likewise, it is this attack on CCleaner may have had quite specific targets and that were attacked in a way that has not been discovered so far. As the user base of CCleaner is very large, attackers may have hit the most diverse targets with this action. By the quality of the attack, however, it does not seem that their intent was to contaminate as many users as possible. 

3. As the initial virus code was only in CCleaner and many computers did not get to receive the second stage of the contamination, updating CCleaner is enough to eliminate the problem. 

4. The possibility is quite small. If advanced malware was distributed through CCleaner, it is unlikely that it attacked your computer (unless you were, for some reason, among the targets of the attackers). However, although the probability is extremely low, it can not be ruled out altogether. 

Only a thorough scrutiny of your computer could tell you whether or not there is any trace of it. In general, you need to rely on security programs. If the program does not charge any problems, it is best not to get paranoid. 

>>> Advertisement on mobile 
Hello, I saw the [ fraudulent ads on mobile ] article and would like to confirm the information on it. It's the same thing with me! My cell phone started to vibrate and a message appeared saying that my cell phone had 2 types of virus and directed me to an app called ACTIVATOR AND CLEANING ANTIVIRUS, however my cell phone did not show anything abnormal. So I would like to confirm whether I need to take any action or it was just a false alert. I await an answer. Thanks in advance. 
José Ailton 

Joseph, most likely you will not have to take any action. These ads are totally fake. They use functions of the cellphone itself to make the device vibrate and / or emit sounds. Also usually a trick is used - which is quite simple yet effective - so you can not use the "back" button. Therefore, the screen will be locked in the alert message until you close the internet browser. 

However, once you close the browser, there's nothing to worry about, especially if you did not install the application suggested by the message. Because applications rarely have any relation to the false "bug" displayed, there is usually no need to install the app. 

If your cell phone does not show anything abnormal, you can rest easy.