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TROJ_VBKRYPT.AXA

October 13, 2012
 ALIASES:

PWS:Win32/Zbot (Microsoft); PWS-Zbot.gen.rb (McAfee); Infostealer.Banker.C (Symantec); Trojan.Win32.VBKrypt.izzd (Kaspersky); LooksLike.Win32.Malware!vb (v) (Sunbelt); Trojan.Generic.7167850 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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.

It modifies files, disabling programs and applications from properly running.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

319,488 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

25 May 2012

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.

Installation

This Trojan creates the following folders:

  • %User Profile%\Application Data\Osenv
  • %User Profile%\Application Data\Faoqi
  • %User Profile%\Microsoft\Address Book
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express
  • %System Root%\Documents and Settings\Wilbert
  • %Application Data%\Identities
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

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
{3A275471-CC2D-33D1-DADD-33B4A04B0D2D} = "%User Profile%\Osenv\ytba.exe"

Other System Modifications

This Trojan modifies the following files:

  • %User Profile%\Application Data\Microsoft

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Nemycy

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere

HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4\Wab File Name

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Mail

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\News

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Trident\Settings

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Trident\Main

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Rules\Mail

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
CleanCookies = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Server ID = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Server ID = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Server ID = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Server ID = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager
Server ID = "4"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts
PreConfigVer = "4"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts
PreConfigVerNTDS = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
Account Name = "Active Directory"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Server = "NULL"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Search Return = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Timeout = "3c"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Authentication = "2"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Simple Search = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Bind DN = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Port = "cc4"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Resolve Flag = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Secure Connection = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP User Name = "NULL"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Active Directory GC
LDAP Search Base = "NULL"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
Account Name = "Bigfoot Internet Directory Service"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Server = "ldap.bigfoot.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP URL = "http://www.{BLOCKED}t.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Search Return = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Timeout = "3c"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Authentication = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Simple Search = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\Bigfoot
LDAP Logo = "%ProgramFiles%\Common Files\Services\bigfoot.bmp"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
Account Name = "VeriSign Internet Directory Service"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Server = "directory.verisign.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP URL = "http://www.{BLOCKED}gn.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Search Return = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Timeout = "3c"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Authentication = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Search Base = "NULL"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Simple Search = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\VeriSign
LDAP Logo = "%ProgramFiles%\Common Files\Services\verisign.bmp"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
Account Name = "WhoWhere Internet Directory Service"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Server = "ldap.whowhere.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP URL = "http://www.{BLOCKED}re.com"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Search Return = "64"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Timeout = "3c"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Authentication = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Simple Search = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts\WhoWhere
LDAP Logo = "%ProgramFiles%\Common Files\Services\whowhere.bmp"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager
Default LDAP Account = "Active Directory GC"

HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkContactRefresh = "0"

HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkFolderRefresh = "0"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}
Identity Ordinal = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts
ConnectionSettingsMigrated = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
VerStamp = "3"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
SpellDontIgnoreDBCS = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Mail
Welcome Message = "{random values}"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Mail
Accounts Checked = "{random values}"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\News
Accounts Checked = "{random values}"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
MSIMN = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts
AssociatedID = "{random values}"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
StoreMigratedV5 = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
ConvertedToDBX = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
Settings Upgraded = "7"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Mail
Safe Attachments = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
Running = "1"

HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
FirstRun = "1"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0\Mail
Welcome Message = "0"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
SpoolerDlgPos = "{random values}"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
SpoolerTack = "0"

HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\
Software\Microsoft\Outlook Express\
5.0
Running = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Nemycy
Zeima = "{random values}"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1406 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1406 = "0"

(Note: The default value data of the said registry entry is 3.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1406 = "0"

(Note: The default value data of the said registry entry is 3.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Identities
Identity Ordinal = "2"

(Note: The default value data of the said registry entry is 1.)

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\Microsoft\Crypto
  • %User Profile%\Crypto\RSA
  • %User Profile%\RSA\S-1-5-21-1645522239-1292428093-682003330-1003
  • %User Profile%\Osenv\ytba.exe
  • %User Profile%\Faoqi\fyro.kiv
  • %User Profile%\Address Book\Wilbert.wab
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express\Inbox.dbx
  • %User Temp%\MPS1.tmp
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express\Sent Items.dbx
  • %User Profile%\Address Book\Wilbert.wab~

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}ve.info/messid.bin

It deletes itself after execution.

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_CURRENT_USER\Software\Microsoft
    • Nemycy
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
    • Privacy
  • In HKEY_CURRENT_USER\Software\Microsoft
    • Internet Account Manager
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
    • Accounts
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • Active Directory GC
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • Bigfoot
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • VeriSign
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • WhoWhere
  • In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    • Wab File Name
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • Mail
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • News
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Trident
    • Settings
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Trident
    • Main
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Rules
    • Mail

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • {3A275471-CC2D-33D1-DADD-33B4A04B0D2D} = "%User Profile%\Osenv\ytba.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Privacy
    • CleanCookies = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Server ID = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Server ID = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Server ID = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Server ID = "3"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
    • Server ID = "4"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • PreConfigVer = "4"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • PreConfigVerNTDS = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • Account Name = "Active Directory"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Server = "NULL"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Search Return = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Timeout = "3c"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Authentication = "2"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Simple Search = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Bind DN = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Port = "cc4"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Resolve Flag = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Secure Connection = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP User Name = "NULL"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Active Directory GC
    • LDAP Search Base = "NULL"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • Account Name = "Bigfoot Internet Directory Service"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Server = "ldap.bigfoot.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP URL = "http://www.{BLOCKED}t.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Search Return = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Timeout = "3c"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Authentication = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Simple Search = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\Bigfoot
    • LDAP Logo = "%ProgramFiles%\Common Files\Services\bigfoot.bmp"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • Account Name = "VeriSign Internet Directory Service"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Server = "directory.verisign.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP URL = "http://www.{BLOCKED}gn.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Search Return = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Timeout = "3c"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Authentication = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Search Base = "NULL"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Simple Search = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\VeriSign
    • LDAP Logo = "%ProgramFiles%\Common Files\Services\verisign.bmp"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • Account Name = "WhoWhere Internet Directory Service"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Server = "ldap.whowhere.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP URL = "http://www.{BLOCKED}re.com"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Search Return = "64"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Timeout = "3c"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Authentication = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Simple Search = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts\WhoWhere
    • LDAP Logo = "%ProgramFiles%\Common Files\Services\whowhere.bmp"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
    • Default LDAP Account = "Active Directory GC"
  • In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    • OlkContactRefresh = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    • OlkFolderRefresh = "0"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}
    • Identity Ordinal = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • ConnectionSettingsMigrated = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • VerStamp = "3"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • SpellDontIgnoreDBCS = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Mail
    • Welcome Message = "{random values}"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Mail
    • Accounts Checked = "{random values}"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\News
    • Accounts Checked = "{random values}"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • MSIMN = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • AssociatedID = "{random values}"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • StoreMigratedV5 = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • ConvertedToDBX = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • Settings Upgraded = "7"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Mail
    • Safe Attachments = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • Running = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
    • FirstRun = "1"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0\Mail
    • Welcome Message = "0"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • SpoolerDlgPos = "{random values}"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • SpoolerTack = "0"
  • In HKEY_CURRENT_USER\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Software\Microsoft\Outlook Express\5.0
    • Running = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Nemycy
    • Zeima = "{random values}"

Step 5

Restore this modified 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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
    • From: 1406 = "0"
      To: 1406 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • From: 1406 = "0"
      To: 1406 = ""3""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
    • From: 1406 = "0"
      To: 1406 = ""3""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Identities
    • From: Identity Ordinal = "2"
      To: Identity Ordinal = ""1""

Step 6

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Profile%\Microsoft\Crypto
  • %User Profile%\Crypto\RSA
  • %User Profile%\RSA\S-1-5-21-1645522239-1292428093-682003330-1003
  • %User Profile%\Osenv\ytba.exe
  • %User Profile%\Faoqi\fyro.kiv
  • %User Profile%\Address Book\Wilbert.wab
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express\Inbox.dbx
  • %User Temp%\MPS1.tmp
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express\Sent Items.dbx
  • %User Profile%\Address Book\Wilbert.wab~

Step 7

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Profile%\Application Data\Osenv
  • %User Profile%\Application Data\Faoqi
  • %User Profile%\Microsoft\Address Book
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft\Outlook Express
  • %System Root%\Documents and Settings\Wilbert
  • %Application Data%\Identities
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}
  • %Application Data%\Identities\{8A24C031-62FE-4BF5-94F0-BFD4FBCD674B}\Microsoft

Step 8

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

Step 9

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    • %User Profile%\Application Data\Microsoft


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