OSX_ARCHSMS.A

December 13, 2012
 Analysis by: Mark Joseph Manahan
 ALIASES:

Trojan.SMSSend.3666 (DrWeb), Trojan.OSX.SMSsend.A, Hoax.OSX.ArchSMS.a (Kaspersky), OSX/ArchSMS-J

 PLATFORM:

Mac OS X

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan is a fake installer for Mac OS X. It asks for the user's mobile number. As such, users are charged for the bogus program through their mobile accounts.

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

For the related story, you may read the blog post Fake Installer for Mac OS Charges Users via Their Mobile Account

This Trojan may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

13,208,680 bytes

File Type:

Mach-O

Initial Samples Received Date:

13 Dec 2012

Payload:

Displays graphics/image

Arrival Details

This Trojan may be manually installed by a user.

Other Details

This Trojan displays a pop-up window with the following message:


NOTES:

This malware displays a pop-up screen that requires a mobile number in order to extract an application. When users, provided their number they receive an activation code that when entered on the pop-up screen results in money loss or increase in billings.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.592.03

FIRST VSAPI PATTERN DATE:

13 Dec 2012

VSAPI OPR PATTERN File:

9.595.00

VSAPI OPR PATTERN Date:

15 Dec 2012

Scan your computer with your Trend Micro product to delete files detected as OSX_ARCHSMS.A. 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.


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