Analysis by: Mark Joseph Manahan
ALIASES:

Hoax.Win32.ArchSMS.plch (Kaspersky), Trojan.ADH.2 (Symantec), a variant of Win32/Hoax.ArchSMS.TC application (Eset)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 7,725,253 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 14 Dec 2012

Arrival Details

This Trojan may be manually installed by a user.

Other Details

This Trojan connects to the following possibly malicious URL:

  • rep.{BLOCKED}a.ru/wa.php
  • srv.{BLOCKED}o.ru/{values}

NOTES:

It displays a pop-up window wherein users need to send an SMS to a premium-rate number in order to proceed with the installation of the file. Upon sending, it results to possible money loss or increase in the billing of mobile user.

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.592.06
FIRST VSAPI PATTERN DATE: 14 Dec 2012

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_ARCHSMS.VK. 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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