One tried-and-true technique continues to be hiding malware inside fake versions of popular files , then distributing Attack.Phishing those fake versions via app stores . Doing the same via peer-to-peer BitTorrent networks has also long been popular . But as with so many supposedly free versions of paid-for applications , users may get more than they bargained for . To wit , last week researchers at the security firm ESET spotted new ransomware - Filecoder.E - circulating via BitTorrent , disguised as Attack.Phishing a `` patcher '' that purports to allow Mac users to crack such applications as Adobe Premiere Pro CC and Microsoft Office 2016 . As Toronto-based security researcher Cheryl Biswas notes in a blog post : `` For those who torrent , be careful . ESET says the ransomware can also encrypt any Time Machine backups on network-connected volumes that are mounted at the time of the attack Attack.Ransom . If the ransomware infects a system , it demands Attack.Ransom 0.25 bitcoins - currently worth about $ 300 - for a decryption key . But ESET security researcher Marc-Etienne M.L Éveillé , in a blog post , says the application is so poorly coded that there 's no way that a victim could ever obtain a decryption key . So far , ESET reports that the single bitcoin wallet tied to the ransomware has received no payments . `` There is one big problem with this ransomware : It does n't have any code to communicate with any C & C ; server , '' says Éveillé , referring to a command-and-control server that might have been used to remotely control the infected endpoint . `` This means that there is no way the key that was used to encrypt the files can be sent to the malware operators . This also means that there is no way for them to provide a way to decrypt a victim 's files . '' The longstanding ransomware-defense advice , of course , is to never pay ransoms Attack.Ransom , because this directly funds cybercrime groups ' ongoing research and development . Instead , stay prepared : Keep complete , disconnected backups of all systems , and periodically test that they can be restored , and thus never have to consider paying a ransom Attack.Ransom . `` We advise that victims never pay the ransom Attack.Ransom when hit by ransomware , '' Éveillé says . In other ransomware news , new ransomware known as Trump Locker - not to be confused with Trumpcryption - turns out to be a lightly repackaged version of VenusLocker ransomware , according to Lawrence Abrams of the security analysis site Bleeping Computer , as well as the researchers known as MalwareHunter Team . `` Unfortunately , you are hacked , '' the start of the malware's ransom demand Attack.Ransom reportedly reads . VenusLocker first appeared in October 2016 ; it got a refresh two months later . The researchers do n't know if the group distributing Trump Locker is the same group that distributed VenusLocker , or if another group of attackers reverse-engineered the code . But they say that functionally , the two pieces of malware appear to be virtually identical , Bleeping Computer reports . For example , both Trump Locker and VenusLocker will encrypt some files types in full , while only encrypting the first 1024 bytes of other file types , including PDF , XLS , DOCX , and MP3 file formats . Fully encrypted files have `` .TheTrumpLockerf '' appended to their filename , while partially encrypted files get a `` .TheTrumpLockerp '' extension added , the researchers say . Finally , ransomware gangs ' use of customer service portals - to help and encourage victims to pay their ransoms Attack.Ransom - continues , says Mikko Hypponen , chief research officer of Finnish security firm F-Secure . One chief function of this support appears to be to help victims who do n't know their Windows from their ASP to find a way to remit bitcoins Attack.Ransom to attackers , according to research into crypto-ransomware called Spora and its related customer-support operation , conducted by F-Secure 's Sean Sullivan .