Analysis by: Marfel Tiamzon
ALIASES:

Microsoft: TrojanDownloader:Win32/Stegvob.B; Kaspersky: Trojan-Downloader.Win32.Agent.gxvy

 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 as an attachment to email messages spammed by other malware/grayware or malicious users. It 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: 26,112 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 30 Sep 2011

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path and file name} = {malware path and file name}.exe:*:Enabled:ldrsoft

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}nd.com
  • http://{BLOCKED}nd.com/au.exe
  • http://{BLOCKED}s.com
  • http://{BLOCKED}s.com/au.exe

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