India, March 17 -- An 82-year-old retired army officer lost Rs.12.05 lakh to cyber fraudsters who posed as courier service executives and tricked him into downloading a malicious APK file to hack his phone, police said. Col Rajbir Singh Duggal (retired), a resident of Victoria Enclave in Sector 50-C, stated in his complaint to the cyber crime police station in Sector 17 that he searched for a courier company's contact number online as he had to send a parcel to Pune. Spotting a number on Google, he dialed it and spoke to someone who asked him to pay Rs.10 for booking a parcel pickup. Even after making the payment, when the parcel was not picked up, the complainant unsuccessfully tried dialing that number next day. Later, the fraudster contacted him via WhatsApp and asked him to download an APK file on his mobile phone. Police said that after installing the file, the victim's phone was compromised and Rs.12.05 lakh was withdrawn from his bank account through multiple transactions. Col Duggal informed the bank and also lodged a complaint through the national cyber crime portal before approaching the cyber crime police station. The police have registered an FIR under Sections 318(4) (cheating), 319(2) (cheating by personation), 336(3) (forgery), 338 (forgery ), 340(2) (forging a document) and 61(2) (criminal conspiracy) of the Bharatiya Nyaya Sanhita (BNS) against unknown persons. An APK (Android Package Kit) is a file format used to install applications on Android phones. APK files can be shared through links on WhatsApp, Telegram, SMS or websites. These files are not verified and may contain malicious software. Once fraudsters make victims install such files that entails granting phone's permissions, the criminals get access to one-time passwords, banking apps, etc. Using stolen OTPs or banking access, criminals transfer money from the victim's bank account or digital wallet....