Analysis by: Sabrina Lei Sioting
ALIASES:

Trojan:Win32/AproposMedia (Microsoft), Adware-Apropos (McAfee), Trojan.Win32.Apropo (fs) (Sunbelt), Adware/Apropos (Fortinet), Trojan-Downloader.Win32.Apropo (Ikarus),

 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:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 712,704 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 07 Apr 2011

Arrival Details

This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Download Routine

This adware connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}ad.contextplus.net/shared/AutoUpdaterInstaller.exe
  • http://{BLOCKED}ad.contextplus.net/shared/Msvcp60Installer.exe
  • http://{BLOCKEDcslab.com/shared/AutoUpdaterInstaller.exe}
  • http://{BLOCKED}cslab.com/shared/Msvcp60Installer.exe
  • http://{BLOCKED}cslab.com/test/shared/AutoUpdaterInstaller.exe
  • http://{BLOCKED}cslab.com/test/shared/Msvcp60Installer.exe

  SOLUTION

Minimum Scan Engine: 9.300
SSAPI PATTERN File: 1.164.28
SSAPI PATTERN Date: 07 Apr 2011

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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as ADW_APROPOS.F. 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.


Did this description help? Tell us how we did.