ALIASES:

Trojan.ADH (Symantec); Trojan.Win32.Agent.adwt (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.1401811 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor 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: 3,265,079 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 02 Oct 2012

Arrival Details

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

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Explorer = "%User Profile%\Application Data\explorer.exe"

Other System Modifications

This backdoor adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\THQ\
Frontlines: Fuel of War

HKEY_LOCAL_MACHINE\SOFTWARE\Activision\
Call of Duty 4

HKEY_LOCAL_MACHINE\SOFTWARE\Sunflowers\
Anno 1701

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield 1942

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield 1942 Secret Weapons of WWII

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield 1942 The Road to Rome

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield Vietnam

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield 2 Special Forces

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Battlefield 2142

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Black and White

HKEY_LOCAL_MACHINE\SOFTWARE\Activision\
Call of Duty

HKEY_LOCAL_MACHINE\SOFTWARE\Activision\
Call of Duty United Offensive

HKEY_LOCAL_MACHINE\SOFTWARE\Activision\
Call of Duty 2

HKEY_LOCAL_MACHINE\Software\Techland\
Chrome

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\Generals

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Command and Conquer Generals Zero Hour

HKEY_LOCAL_MACHINE\SOFTWARE\Westwood\
Red Alert

HKEY_LOCAL_MACHINE\Software\Westwood\
Red Alert 2

HKEY_LOCAL_MACHINE\Software\Westwood\
Tiberian Sun

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
Electronic Arts\Command and Conquer 3

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA Sports\FIFA 2002

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA Sports\FIFA 2003

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA Distribution\Freedom Force

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Global Operations

HKEY_LOCAL_MACHINE\Software\Illusion Softworks\
Hidden & Dangerous 2

HKEY_CURRENT_USER\Software\JoWooD\
InstalledGames\IG2

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\James Bond 007 Nightfire

HKEY_CURRENT_USER\Software\3d0\
Status

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Medal of Honor Allied Assault

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Medal of Honor Allied Assault Breakthrough

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA GAMES\Medal of Honor Allied Assault Spearhead

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA Sports\Nascar Racing 2002

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
EA Sports\Nascar Racing 2003

HKEY_LOCAL_MACHINE\Software\Red Storm Entertainment\
RAVENSHIELD

HKEY_CURRENT_USER\Software\Silver Style Entertainment\
Soldiers Of Anarchy\Settings

HKEY_CURRENT_USER\Software\Eugen Systems\
The Gladiators

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
Maxis\The Sims

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
Maxis\The Sims Livin' Large

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
Maxis\The Sims House Party

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Family Fun Stuff

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Glamour Life Stuff

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Nightlife

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Pets

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Open for Business

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 Seasons

HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\
EA Games\The Sims 2 University

HKEY_LOCAL_MACHINE\Software\TechSmith\
SnagIt\8

HKEY_LOCAL_MACHINE\Software\Electronic Arts\
Battlefield 2

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Notepad\DefaultFonts

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Notepad\DefaultFonts
Key = "33735612-B90B-4B0D-A16B-A5B4321EC12D"

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\THQ
    • Frontlines: Fuel of War
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Activision
    • Call of Duty 4
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Sunflowers
    • Anno 1701
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield 1942
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield 1942 Secret Weapons of WWII
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield 1942 The Road to Rome
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield Vietnam
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield 2 Special Forces
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Battlefield 2142
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Black and White
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Activision
    • Call of Duty
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Activision
    • Call of Duty United Offensive
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Activision
    • Call of Duty 2
  • In HKEY_LOCAL_MACHINE\Software\Techland
    • Chrome
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • Generals
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Command and Conquer Generals Zero Hour
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Westwood
    • Red Alert
  • In HKEY_LOCAL_MACHINE\Software\Westwood
    • Red Alert 2
  • In HKEY_LOCAL_MACHINE\Software\Westwood
    • Tiberian Sun
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\Electronic Arts
    • Command and Conquer 3
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA Sports
    • FIFA 2002
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA Sports
    • FIFA 2003
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA Distribution
    • Freedom Force
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Global Operations
  • In HKEY_LOCAL_MACHINE\Software\Illusion Softworks
    • Hidden & Dangerous 2
  • In HKEY_CURRENT_USER\Software\JoWooD\InstalledGames
    • IG2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • James Bond 007 Nightfire
  • In HKEY_CURRENT_USER\Software\3d0
    • Status
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Medal of Honor Allied Assault
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Medal of Honor Allied Assault Breakthrough
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA GAMES
    • Medal of Honor Allied Assault Spearhead
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA Sports
    • Nascar Racing 2002
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\EA Sports
    • Nascar Racing 2003
  • In HKEY_LOCAL_MACHINE\Software\Red Storm Entertainment
    • RAVENSHIELD
  • In HKEY_CURRENT_USER\Software\Silver Style Entertainment\Soldiers Of Anarchy
    • Settings
  • In HKEY_CURRENT_USER\Software\Eugen Systems
    • The Gladiators
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\Maxis
    • The Sims
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\Maxis
    • The Sims Livin' Large
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts\Maxis
    • The Sims House Party
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Family Fun Stuff
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Glamour Life Stuff
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Nightlife
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Pets
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Open for Business
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 Seasons
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Electronic Arts\EA Games
    • The Sims 2 University
  • In HKEY_LOCAL_MACHINE\Software\TechSmith\SnagIt
    • 8
  • In HKEY_LOCAL_MACHINE\Software\Electronic Arts
    • Battlefield 2
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Notepad
    • DefaultFonts

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Explorer = "%User Profile%\Application Data\explorer.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Notepad\DefaultFonts
    • Key = "33735612-B90B-4B0D-A16B-A5B4321EC12D"

Step 5

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


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