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TROJ_HILOTI.FNZ
Malware type: Trojan
Destructive: No
Platform: Windows 2000, XP, Server 2003
Encrypted: Yes
In the wild: Yes

Overview


This Trojan uses social engineering methods to lure users into performing certain actions that may, directly or indirectly, cause malicious routines to be performed. Specifically, it makes use of Newegg, a popular online computer hardware/software seller.

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

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites. However, as of this writing, the said sites are inaccessible.

Technical Details


File size: 79,360 bytes
File type: PE
Memory resident: Yes
Initial samples received date: 24 Aug 2010
Payload: Downloads files

Arrival Details

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

It may be downloaded by other malware/grayware/spyware from remote sites.

It may be unknowingly downloaded by a user while visiting malicious websites.

However, as of this writing, the said sites are inaccessible.

Installation

This Trojan injects itself into the following processes running in the affected system's memory:

  • Explorer.exe

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random characters} = rundll32.exe {malware path and file name},Startup

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random characters} = rundll32.exe {malware path and file name},iep

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\{random characters}

Other Details

This Trojan attempts to access the following websites to download files, which are possibly malicious:

  • http://{random character}.{BLOCKED}v.com/get2.php?c={random character}
  • {BLOCKED}h9uploading.com
  • http://{random character}.{BLOCKED}l.com/get2.php?c={random character}

Solution


Minimum scan engine: 8.900
First VSAPI Pattern File: 7.408.01
First VSAPI Pattern Release Date: 25 Aug 2010
VSAPI OPR Pattern Version: 7.409.00
VSAPI OPR Pattern Release Date: 26 Aug 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product and note files detected as TROJ_HILOTI.FNZ

Step 3

Restart in Safe Mode

[ Learn more ]


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Analysis By: Karl Dominguez

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