The following applications have been infected by Joker:ġ. Antivirus Security – Security Scan, App LockĢ4. Spark Wallpaper How to protect your Android devices against Joker Joker has targeted these 37 countries: Australia, Austria, Belgium, Brazil, China, Cyprus, Egypt, France, Germany, Ghana, Greece, Honduras, India, Indonesia, Ireland, Italy, Kuwait, Malaysia, Myanmar, Netherlands, Norway, Poland, Portugal, Qatar, Republic of Argentina, Serbia, Singapore, Slovenia, Spain, Sweden, Switzerland, Thailand, Turkey, Ukraine, the United Arab Emirates, the United Kingdom, and the United States. All of Joker’s activities are controlled by a command and control (C&C) server operated by the cybercriminals. This Joker spyware comes with two components: one that identifies the device location, and another that automatically subscribes users to the premium package offered in the ads by the campaign sponsors. This spyware secretly collects users’ personal details, like contacts and other address book details, and is aptly named Joker. Joker uses the SMS collection module to confirm the user’s country. All infected apps contain a sophisticated list of mobile country codes, which Joker openly exploits. Cybercriminals are also sending command and control codes that can be executed using a Javascript to keep their spyware alive. Cybercriminals are deploying this spyware through the advertisement framework in those compromised apps. Researchers have stated that this spyware also has the capabilities of normal malware and appears to have infected certain apps in Google Play with more than 100,000 installations. This malware is capable of stealing users’ personal information including contact details, device data, WAP services, and SMS messages.Security experts from Google have discovered a new spyware in 24 Play Store apps that, combined, have more than 472,000 downloads.

It manages to take advantage of Google’s official app store with the help of its trail signatures which includes updating the virus’s code, execution process, and payload-retrieval techniques. Joker is one of the most well-known malware families on Android devices.

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