Home > All, Security Issues > Android malware is no longer just about premium rate calls

Android malware is no longer just about premium rate calls

Experts have been warning for some time about the increasing sophistication of mobile malware. Now FireEye has discovered a new variant of Android.MisoSMS — which was already an advanced information-stealing Android Trojan.

Like the original version of the malware, the new variant sends copies of users’ text messages to servers in China. But the newest rendition adds a few features that make it harder to detect, including a new disguise, encrypted transmissions, and command-and-control (CnC) communications that are handled natively rather than over email.
FireEye — Android.MisoSMS : Its back! Now with XTEA

The latest variant seeks to communicate with its C&C server — still located in China — via a selection of hardcoded public DNS servers. This helps defeat sandbox detection and analysis since sandboxes “typically use internal DNS servers and cut off access to outside networks,” explains FireEye. “If the malware cannot access the hard-coded DNS servers, it does nothing and is therefore not detected.”

A further new sophistication is the use of encryption — a variant of the XTEA encryption algorithm — in communication with the C&C server. It is clear that it is malware designed to infiltrate and persist.


It suggests, warns FireEye, “that cyber attackers are increasingly eyeing mobile devices — and the valuable information they store — as targets. It also serves as a vivid reminder of how crucial protecting this threat vector is in today’s mobile environment.”

Categories: All, Security Issues
  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s