Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

As of this writing, the said sites are inaccessible.

It displays fake alerts. It installs a fake antivirus/antispyware software.

  TECHNICAL DETAILS

File Size: 174,123 bytes
File Type: HTML, HTM
Memory Resident: Yes
Initial Samples Received Date: 16 May 2011
Payload: Downloads files, Displays fake alerts

Arrival Details

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

  • http://{host site}{BLOCKED}ystemscan.exe

As of this writing, the said sites are inaccessible.

Rogue Antivirus Routine

This Trojan displays fake alerts.

It installs a fake antivirus/antispyware software.