Analysis by: Cris Nowell Pantanilla
ALIASES:

Trojan-SMS.AndroidOS.Jifake.f (Kaspersky), Trj/Jifake.A (Panda)

 THREAT SUBTYPE:

Premium Service Abuser

 PLATFORM:

Android OS

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This malware arrives as a Trojanized application named Jimm Application (an instant messaging client for ICQ network). It sends SMS messages to premium-rate numbers thus the user is billed for these subscriptions.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan may be downloaded using malicious QR codes. Once the malicious QR code is scanned, the user is redirected to a URL where the malicious file can be downloaded.

It attempts to sends several SMS messages to a certain premium rate number. An icon named 'JimmRussia' also appears in the phone menu.

  TECHNICAL DETAILS

File Size: 2,700,420 bytes
File Type: DEX
Memory Resident: No
Initial Samples Received Date: 28 Sep 2011

NOTES:

This Trojan may be downloaded using malicious QR codes. Once the malicious QR code is scanned, the user is redirected to a URL where the malicious file can be downloaded.

The downloaded malware is a Trojanized Jimm application (instant messaging client for ICQ network). It attempts to sends several SMS messages to premium rate number 2476. Once installed, an icon named ‘JimmRussia’ appears in the phone menu.

  SOLUTION

Minimum Scan Engine: 9.200
TMMS Pattern File: 1.143.00
TMMS Pattern Date: 03 Oct 2011

Step 1

Trend Micro Mobile Security Solution

Trend Micro Mobile Security Personal Edition protects Android smartphones and tablets from malicious and Trojanized applications. The App Scanner is free and detects malicious and Trojanized apps as they are downloaded, while SmartSurfing blocks malicious websites using your device's Android browser.

Download and install the Trend Micro Mobile Security App via Google Play.

Step 2

Remove unwanted apps on your Android mobile device

[ Learn More ]

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