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J2ME_JIFAKE.AA

October 04, 2011
 ALIASES:

Trojan-SMS.J2ME.Jifake.e (Kaspersky)

 THREAT SUBTYPE:

Premium Service Abuser

 PLATFORM:

Mobile devices that run J2ME or Java MIDlet

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be downloaded using malicious QR codes. Once the malicious QR code is scanned, the user will be redirected to a URL where the malicious file can be downloaded. It then sends text 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 disguises itself as Jimm Application, a mobile client for ICQ.

This malware may send a pre-defined SMS message to certian premium rate numbers.

  TECHNICAL DETAILS

File Size:

94, 685 bytes

Memory Resident:

Yes

Initial Samples Received Date:

01 Oct 2011

Arrival Details

This Trojan may be downloaded from the following remote sites:

  • http://{BLOCKED}5.ru/jimm2s.jar

NOTES:

It disguises itself as Jimm Application, a mobile client for ICQ.

It may send a pre-defined SMS message to the following premium rate numbers:

  • 1098
  • 1121
  • 1161
  • 1171
  • 1635
  • 1645
  • 17012
  • 17013
  • 179479
  • 1873
  • 1874
  • 1945
  • 2322
  • 2810
  • 2895
  • 3141
  • 4449
  • 4545
  • 4565
  • 5014
  • 5339
  • 7117
  • 72170
  • 7654
  • 7796
  • 7910
  • 80888
  • 83868
  • 9013
  • 9014
  • 90645045
  • 9090150
  • 9090199
  • 930399999
  • 9915
  • 9916

It sends any of the following pre-defined SMS messages:

86767609

jimm2

As a result, the user is billed for these unauthorized premium rate service subscriptions.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.468.01

FIRST VSAPI PATTERN DATE:

01 Oct 2011

VSAPI OPR PATTERN File:

8.473.00

VSAPI OPR PATTERN Date:

05 Oct 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as J2ME_JIFAKE.AA. 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.

Step 3

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.


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