Author: Daisuke Nakajima

Daisuke Nakajima Daisuke Nakajima is a mobile malware researcher and part of McAfee's Mobile Research and Operations team. He is based in Tokyo, and specializes in malware analysis, reverse-engineering, and malware detection code development.

Today many people use multiple web services, such as social networking and messaging services. Some users explicitly show their identity in these services, but others visit those services separately–as unidentifiable, different users. To protect their privacy, the latter group might not want their accounts and activities on multiple services to be associated with each other. […]

Android users usually download and install applications from the Google Play store through several interactions with the service–including viewing the app’s description and granting permission requests by the app. This confirmation procedure helps us avoid installing malicious and potentially unwanted apps. However, McAfee recently found a suspicious app on Google Play that almost automatically downloads, […]

Malware related to short message services occupies a large portion of today’s Android malware families. These include premium SMS fraud and SMS spying. Such SMS-based malware apps are actively distributed via unofficial or malicious app stores, but it is rare to find them on Google Play, the world’s largest official Android app store. Nonetheless, we […]

Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan. They allow users of well-known communication services like LINE and Kakao Talk to make friends with others by publishing profiles and service IDs, yet without disclosing real phone numbers and email addresses. Such sites and […]

Last year we saw an attack targeting Android device users in which more than 2,400 malicious one-click fraud apps were published on Google Play in Japan. The attack has calmed down since October 2013, but it seems the scammers are still looking for opportunities to victimize smart device users in Japan. As we enter 2014, […]