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JAVA_SMSSEND.AB

October 16, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Trojan.Java.Smssend.X (FSecure), Java/SMSer.L (Authentium)

 PLATFORM:

Java mobile

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

This Trojan poses as an installer of Skype for the Android platform.

It abuses premium service numbers.

  TECHNICAL DETAILS

File Size:

30,073 bytes

File Type:

JAR

Initial Samples Received Date:

30 Jun 2012

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting the following malicious websites:

  • http://{BLOCKED}roidl.ru/
  • http://{BLOCKED}mobile.net/midlets/12848_{random number}/skype52_installer.jar

NOTES:

This Trojan is a Java MIDlet that poses as an installer of Skype for the Android platform.

Upon execution, it displays the following user interface:

Pressing the left soft key of the mobile phone displays the following:

Pressing the right soft key redirects the phone's browser to the URL http://{BLOCKED}1.net/?u=1l4zi3m938o80vl.

It may send an SMS message to any of the following numbers, which in turn charges affected users according to the respective number's rate:

  • 1
  • 1151
  • 1161
  • 2855
  • 5373
  • 5537
  • 7099
  • 7151
  • 7204
  • 7250
  • 8887
  • 8926
  • 9151
  • 9685

The SMS message it sends contains the following text:

e@1b07961, e@f1036f, e@1187f5b

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.224.06

FIRST VSAPI PATTERN DATE:

30 Jun 2012

VSAPI OPR PATTERN File:

9.225.00

VSAPI OPR PATTERN Date:

30 Jun 2012

Scan your computer with your Trend Micro product to delete files detected as JAVA_SMSSEND.AB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

NOTES:
To delete the malware in your mobile device manually, select the malware file and delete it according to the device's specifications.


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