Avast allegedly collected data on what many of its users did online and sent it to Jumpshot.
The software was apparently tracking and data from Google and Google Maps searches, LinkedIn pages, YouTube videos, and porn websites.
These spyware apps were available on Play Store and could be used to track people without any indication.
Multiple cybersecurity companies have updated their products after the malware file was shared on Github.
Thousands of affordable Android smartphones across countries including India come preloaded with malware: Report
Avast claimed that most of the devices which have been found to be carrying adware are not certified by Google and carry an adware that called "Cosiloon".
Avast has Summit Partners among its minority investors alongside Pavel Baudiš and Eduard Kučera who founded the company in 1991.
Piriform, Avast said in blog posts that no damage had been detected, although more than 2 million people had installed tainted versions of CCleaner.
The leaks had enough technical details for security experts to recognize that compromises exist, but provided few specifics needed to offer fixes.
Avast Software, maker of the world's most popular computer antivirus program, will need a year to absorb its $1.3 billion buy of rival AVG but may seek further acquisitions before an expected flotation, its chief executive said in an interview.
Popular consumer antivirus company Avast would acquire its rival AVG for $1.3 billion, in an all cash deal. And the first thought that crossed my mind was whether antivirus companies mattered anymore. But on deeper pondering and discussing with a few individuals in the industry, what I realised was that it isn’t a straightforward question to answer.
The poll conducted by Avast revealed that people locked their photo apps over banking apps, despite them being more concerned about their financial privacy.
Cybersecurity firm Avast has said that Google, WhatsApp and Facebook spy on their users to find out their interest for serving targeted advertisements, but their users are well aware about this.