The famous security agency avast released a report saying that its security threat laboratory found thatA number of Android phones from manufacturers such as ZTE, Archos, and MyPhone have pre-installed malicious adware.
The malware was named "Cosiloon".It will overwrite an advertisement at the top of the page when the user uses the browser to access the Internet.
Avast claimed that this malicious software has been quietly in existence for at least three years, and pre-installed on the firmware level of mobile phones, it is almost impossible for ordinary users to completely remove it.
Avast observed that since these phones have not been authenticated by Google, they have caused thousands of users to move in, especially in recent months.Already discovered that about 18,000 mobile phones have this malware, and it has spread over 100 countries and regionsThe worst-hit areas include Russia, Italy, Germany, the United Kingdom, and the United States.
Avast has reported this to Google, who is taking steps to remove malicious application variants on some devices through internal technology.
However, due to the close integration of malware and mobile phone firmware, Google did not have a good way. It could only contact the firmware developer and urge it to solve this problem.