MiningDropper - A Global Modular Android Malware Campaign Operating at Scale

Summary and Analysis of Mining Malware Campaign

The described malware campaign leverages a multi-layered approach to deliver either mining payloads or user-defined payloads, with a focus on evading detection and maintaining flexibility in monetization strategies. Here's a detailed breakdown:

Architecture Overview:

1. Native Library (First Layer):

   • Decrypts the first-stage payload from an encrypted asset file using XOR.
   • Dynamically loads and executes the decrypted DEX file.

2. First-Stage Payload:

   • Acts as a bootstrap loader, decrypting the second-stage payload using AES.
   • The AES key is derived from the SHA-1 hash of the filename plus a suffix (e.g., jajmanpongids1).

3. Second-Stage Payload:

   • Presents a fake Google Play update interface to deceive users.
   • Decrypts and orchestrates further stages using AES, with keys derived similarly.

4. Third-Stage Payload:

   • Contains configuration files that dictate whether the payload is for mining or user-defined functionality.
   • The configurations are decrypted and used to identify subsequent encrypted asset files.

Key Features:

1. Encryption Techniques:
   • XOR decryption in

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