Imagine turning on your smartphone to send a text and finding this threatening notice instead : “ You need to pay Attack.Ransom for us , otherwise we will sell portion of your personal information on black market every 30 minutes . WE GIVE 100 % GUARANTEE THAT ALL FILES WILL RESTORE AFTER WE RECEIVE PAYMENT . WE WILL UNLOCK THE MOBILE DEVICE AND DELETE ALL YOUR DATA FROM OUR SERVER ! TURNING OFF YOUR PHONE IS MEANINGLESS , ALL YOUR DATA IS ALREADY STORED ON OUR SERVERS ! WE STILL CAN SELLING IT FOR SPAM , FAKE , BANK CRIME etc . We collect and download Attack.Databreach all of your personal data . All information about your social networks , Bank accounts , Credit Cards . We collect Attack.Databreach all data about your friends and family . '' This is the message , word for word , found recently by Oren Koriat and Andrey Polkovnichenko , a pair of mobile cybersecurity analysts at Check Point , a security firm in California . The smartphone on which it appeared was an Android model that had been compromised by smartphone ransomware . Ransomware has become a ubiquitous threat to personal-computer users . Criminals remotely access a victim 's computer and lock all the files using encryption software , offering to unlock the data in exchange for a payment Attack.Ransom . The first ransomware attack Attack.Ransom on a phone occurred in 2013 , according to the Check Point researchers , but until now has been confined to small numbers of victims , primarily in Eastern Europe . Now , the company says , the threat has gained a toehold in the United States . Koriat and Polkovnichenko found the software , which they dubbed Charger , embedded in an app called Energy Rescue , which purports to make a phone battery last longer . `` The infected app steals Attack.Databreach contacts and SMS messages from the user ’ s device and asks for admin permissions , '' the company said in a statement . `` If granted , the ransomware locks the device and displays Attack.Ransom a message demanding payment Attack.Ransom . '' The payment demanded Attack.Ransom was 0.2 bitcoin , or about $ 180 at the current exchange rate . ( The phone was being used for business and did n't contain much personal data ; the owner chose to replace the phone rather than pay . ) The most disturbing part of the attack might be that the app was downloaded from the Google Play store . Android phones can use apps from other sources , but security experts usually recommend that users stick to the Play store to take advantage of the processes Google uses to check the software for safety . `` The main issue here is the fact that such a severe threat managed to penetrate Google 's security and enter Google Play , Google 's official app store , '' says Daniel Padon , another member of Check Point 's research team . `` Most malware that manages to enter Google Play has only slim malicious traits , while Charger is about as malicious as can be . As mobile ransomware try to keep the pace with their cousins in the PC world , we are likely to see more efforts of this sort , endangering users around the world . '' Padon added that this malware was particularly sophisticated , using a number of innovative tactics to evade detection by Google . Google commended the security firm for catching the Charger threat so early . `` We appreciate Check Point ’ s efforts to raise awareness about this issue , '' a Google spokesperson says . `` We ’ ve taken the appropriate actions in Play and will continue to work closely with the research community to help keep Android users safe . '' Ransomware attacks on mobile phones are still relatively rare . One well-known case involved users of pornography apps in Eastern Europe who were targeted by ransomware called DataLust , Check Point says . In those cases , the ransom Attack.Ransom was set at 1,000 rubles , or about $ 15 . There 's evidence that Charger , too , comes from Eastern Europe—beyond the clichéd bad grammar of the ransom note . `` This is likely done to keep the developers from being prosecuted in their own countries or being extradited between countries . '' Ransomware attacks Attack.Ransom are joining a growing list of threats to mobile phone securit