Hiloti.gen.f

This page shows details and results of our analysis on the malware Hiloti.gen.f

Overview

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

File Information:

  • MD5: 89D0A5F66FFC6D4FE592487E470E19B1
  • SHA1: 8F3BEBFAA7BBCE31D6614913567CEEA8C5E3B498

Aliases:

  • Kaspersky : Trojan-Downloader.Win32.Mufanom.aafz
  • Microsoft  : Trojan:Win32/Hiloti.gen!D
  • Avast        : Win32:Hilot [Trj]


Minimum DAT

6057 (2010-07-28)

Updated DAT

6088 (2010-08-28)

Minimum Engine

5400.1158

File Length

Varies

Description Added

2010-07-28

Description Modified

2010-08-31

Malware Proliferation

Characteristics

It is a dropped content of source file which is detected as Hiloti.gen.f. This dll file is injected into the explorer.exe and connects to the site 193007[Removed]aldon.com using remote port 80, possibly to download files.

The following registry key has been added to the system:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Cyojileki

The following registry values have been added to the system:

  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\]
    Uzixaxupet = "rundll32.exe "%userprofile%\Desktop\uketozuxa.dll",Startup"

The above mentioned registry entry confirms that the Trojan executes on every system boots.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Cyojileki\]
    Gyowadu="23Mi4567t8"

The following files have been added to the system:

  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}\chrome\content\overlay.xul [Detected as JS/Redirector.ab]
  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}\chrome\content\_cfg.js
  • %AppData% \{4932E013-155B-4F7C-91CA-461D258CB2FE}\chrome.manifest
  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}\install.rdf

The following folders have been added to the system:

  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}
  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}\chrome
  • %AppData%\{4932E013-155B-4F7C-91CA-461D258CB2FE}\chrome\content

[Where %userprofile% - C:\Documents and Settings\[UserName],

%AppData% - C:\Documents and Settings\[UserName]\Application Data.]

Symptoms

The symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

Removal

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

Variants