Several months ago, I asked this list about ways of deleting and blocking 
ever-cookies.  A few list members suggested "CCleaner".  Today, I saw an 
article in the CNN Finance web site about a security breach at Piriform, the 
owner of "CCleaner".  I pasted the text of the article below.

I'm not asking anything here.  I simply want list members who use "CCleaner" to 
be aware of this new issue so they can take appropriate measures.

Bill.

=========================

The latest security breach targeted British software firm Piriform, known for 
its free software CCleaner. Hackers compromised CCleaner in a sophisticated 
attack that affected over 2 million computers, security researchers and 
Piriform confirmed Monday.

CCleaner deletes unneeded files and web browser caches to keep Windows 
computers free of junk. But hackers were able to successfully place malware 
into a new version, released in August. This allowed them to control infected 
computers.

Piriform said in a blog post its parent company Avast discovered the hack 
affected two products -- CCleaner v5.33.6162 and CCleaner Cloud v1.07.3191 -- 
on September 12. The firm has since updated the software.

The company said it worked with law enforcement to shut down the hacker's 
server "before any known harm was done." The breach could let hackers collect 
computer names, IP addresses, and lists of what software people use, but no 
sensitive data was collected, it added.

Researchers from security firm Cisco Talos, which detected the hack, call it a 
"supply chain attack." Attackers got into the original computer system where 
the software was built, and those who downloaded would have no way of knowing 
their computer was compromised.

Research indicated the hacker was collecting information, like reconnaissance, 
about infected computers, according to Talos researcher Craig Williams.

In July, Avast acquired Piriform and said about 130 million people use CCleaner.

"The malware works like a loader," Williams said. "The bad guy could take any 
kind of malware he wanted, like ransomware, and push that down to end users."

The strategy is similar to the major global NotPetya attack in June that 
targeted Ukrainian tax software, Williams added. Hackers infected trusted 
software and people downloaded it without realizing it contained malware.

Piriform advises Windows users to check if they are running compromised 
versions, delete the app, and install the new safe version.
[the end]
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