Retrofitting Mobile Devices for Capturing Memory-Resident Malware Based on System Side-Effects

Overview & Synopsis

Sophisticated memory-resident malware that target mobile phone platforms can be extremely difficult to detect and capture. However, triggering volatile memory captures based on observable system side-effects exhibited by malware can harvest live memory that contains memory-resident malware. This chapter describes a novel approach for capturing memory-resident malware on an Android device for future analysis. The approach is demonstrated by making modifications to the Android debuggerd daemon to capture memory while a vulnerable process is being exploited on a Google Nexus 5 phone. The implementation employs an external hardware device to store a memory capture after successful exfiltration from the compromised mobile device.