An explosion in malware targeting Android users is being fueled in part by a budding market for mobile malcode creation kits, as well as a brisk market for hijacked or fraudulent developer accounts at Google Play that can be used to disguise malware as legitimate apps for sale.
I recently encountered an Android malware developer on a semi-private Underweb forum who was actively buying up verified developer accounts at Google Play for $100 apiece. Google charges just $25 for Android developers who wish to sell their applications through the Google Play marketplace, but it also requires the accounts to be approved and tied to a specific domain. The buyer in this case is offering $100 for sellers willing to part with an active, verified Play account that is tied to a dedicated server.
Unsurprisingly, this particular entrepreneur also sells an Android SMS malware package that targets customers of Citibank, HSBC and ING, as well as 66 other financial institutions in Australia, France, India, Italy, Germany, New Zealand, Singapore, Spain, Switzerland and Turkey (the complete list is here). The targeted banks offer text messages as a form of multi-factor authentication, and this bot is designed to intercept all incoming SMS messages on infected Android phones.
This bot kit — dubbed “Perkele” by a malcoder who goes by the same nickname (‘perkele’ is a Finnish curse word for “devil” or “damn”) — does not appear to be terribly diabolical or sophisticated as modern mobile malware goes. Still, judging from the number and reputation of forum buyers who endorsed Perkele’s malware, it appears quite popular and to perform as advertised.