WORM_OTORUN.TFG

March 16, 2013

ALIASES:

TrojanDropper:Win32/Ambler.F (Microsoft); Generic Dropper!1oh (McAfee); Trojan.Gen (Symantec); Trojan-Dropper.Win32.Dapato.aegf (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

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

It deletes itself after execution.

TECHNICAL DETAILS

File Size:

69,120 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Oct 2012

Arrival Details

This worm 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 worm creates the following folders:

%User Profile%\Application Data\Remote

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
lpc = "rundll32.exe %User Profile%\Remote\dmc01.dll,RegisterDll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
Locale = "EN"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
StubPath = "rundll32.exe %User Profile%\Remote\dmc01.dll, UnregisterDll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
IsInstalled = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
Version = "4,3,6,3"

Other System Modifications

This worm deletes the following files:

%User Profile%\Remote\p.dat
%User Profile%\Remote\io.dat
%User Profile%\Remote\pm.dat
%User Profile%\Remote\mc.dat
%User Profile%\Remote\lr.dat
%User Profile%\Remote\mxd1.txt
%User Temp%\zz2.tmp

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Fox

HKEY_CURRENT_USER\Software\Fox\
fw

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\PhishingFilter

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Fox
D1 = "{random values}"

HKEY_CURRENT_USER\Software\Fox
D2 = "{random values}"

HKEY_CURRENT_USER\Software\Fox
D3 = "{random values}"

HKEY_CURRENT_USER\Software\Fox
pr = "{random values}"

HKEY_CURRENT_USER\Software\Fox\
fw
fb = "05032012_005500_49968"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
2500 = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
2500 = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
2500 = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
2500 = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
2500 = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\PhishingFilter
Enabled = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\PhishingFilter
EnabledV8 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\PhishingFilter
ShownVerifyBalloon = "3"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
TabProcGrowth = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
NoProtectedModeBanner = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Security
DisableFixSecuritySettings = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Security
DisableSecuritySettingsCheck = "1"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1400 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1200 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1405 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1809 = "3"

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

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

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\
Lockdown_Zones\0
1406 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Lockdown_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
1400 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1200 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1405 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1809 = "3"

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

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\
Lockdown_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\
Lockdown_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
1400 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1200 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1405 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1809 = "3"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1406 = "0"

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\
Lockdown_Zones\2
1406 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Lockdown_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
1400 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1200 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1405 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1809 = "3"

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\
Lockdown_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\
Lockdown_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
1400 = "0"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1200 = "0"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1405 = "0"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1809 = "3"

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\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Lockdown_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\
Lockdown_Zones\4
1609 = "0"

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

It deletes the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}

Dropping Routine

This worm drops the following files:

%User Profile%\Remote\dmc01.dll
%User Profile%\Remote\dki
%User Profile%\Remote\dmc01_shrd
%User Temp%\zz1.tmp
%User Profile%\Remote\n.dat

Other Details

This worm deletes itself after execution.

This report is generated via an automated analysis system.

SOLUTION

Minimum Scan Engine:

9.200

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

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
- Fox

In HKEY_CURRENT_USER\Software\Fox
- fw

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- PhishingFilter

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {4413F662-6095-4C7C-9A2F-41A33CD33BA1}

Step 4

Delete this registry value

[ Learn More ]

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- lpc = "rundll32.exe %User Profile%\Remote\dmc01.dll,RegisterDll"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
- Locale = "EN"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
- StubPath = "rundll32.exe %User Profile%\Remote\dmc01.dll, UnregisterDll"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
- IsInstalled = "1"

In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
- Version = "4,3,6,3"

In HKEY_CURRENT_USER\Software\Fox
- D1 = "{random values}"

In HKEY_CURRENT_USER\Software\Fox
- D2 = "{random values}"

In HKEY_CURRENT_USER\Software\Fox
- D3 = "{random values}"

In HKEY_CURRENT_USER\Software\Fox
- pr = "{random values}"

In HKEY_CURRENT_USER\Software\Fox\fw
- fb = "05032012_005500_49968"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- 2500 = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- 2500 = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 2500 = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- 2500 = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- 2500 = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter
- Enabled = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter
- EnabledV8 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter
- ShownVerifyBalloon = "3"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- TabProcGrowth = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- NoProtectedModeBanner = "1"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Security
- DisableFixSecuritySettings = "1"

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Security
- DisableSecuritySettingsCheck = "1"

To delete the registry value this malware/grayware created:

Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run
In the right panel, locate and delete the entry:
lpc = "rundll32.exe %User Profile%\Remote\dmc01.dll,RegisterDll"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Active Setup>Installed Components>{4413F662-6095-4C7C-9A2F-41A33CD33BA1}
In the right panel, locate and delete the entry:
Locale = "EN"
Again In the right panel, locate and delete the entry:
StubPath = "rundll32.exe %User Profile%\Remote\dmc01.dll, UnregisterDll"
Again In the right panel, locate and delete the entry:
IsInstalled = "1"
Again In the right panel, locate and delete the entry:
Version = "4,3,6,3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Fox
In the right panel, locate and delete the entry:
D1 = "{random values}"
Again In the right panel, locate and delete the entry:
D2 = "{random values}"
Again In the right panel, locate and delete the entry:
D3 = "{random values}"
Again In the right panel, locate and delete the entry:
pr = "{random values}"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Fox>fw
In the right panel, locate and delete the entry:
fb = "05032012_005500_49968"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>0
In the right panel, locate and delete the entry:
2500 = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>1
In the right panel, locate and delete the entry:
2500 = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>2
In the right panel, locate and delete the entry:
2500 = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>3
In the right panel, locate and delete the entry:
2500 = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>4
In the right panel, locate and delete the entry:
2500 = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>PhishingFilter
In the right panel, locate and delete the entry:
Enabled = "0"
Again In the right panel, locate and delete the entry:
EnabledV8 = "0"
Again In the right panel, locate and delete the entry:
ShownVerifyBalloon = "3"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Main
In the right panel, locate and delete the entry:
TabProcGrowth = "0"
Again In the right panel, locate and delete the entry:
NoProtectedModeBanner = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Security
In the right panel, locate and delete the entry:
DisableFixSecuritySettings = "1"
Again In the right panel, locate and delete the entry:
DisableSecuritySettingsCheck = "1"
Close Registry Editor.

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- 1400 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- 1200 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- 1405 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
- From: 1809 = "3"
  To: 1809 = ""3""

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

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\Lockdown_Zones\0
- 1406 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\0
- From: 1609 = "0"
  To: 1609 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- 1400 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- 1200 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- 1405 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
- From: 1809 = "3"
  To: 1809 = ""3""

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\Lockdown_Zones\1
- From: 1406 = "0"
  To: 1406 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\1
- From: 1609 = "0"
  To: 1609 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 1400 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 1200 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 1405 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- From: 1809 = "3"
  To: 1809 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
- 1406 = "0"

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\Lockdown_Zones\2
- 1406 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\2
- From: 1609 = "0"
  To: 1609 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- 1400 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- 1200 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- 1405 = "0"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
- 1809 = "3"

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\Lockdown_Zones\3
- From: 1406 = "0"
  To: 1406 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\3
- From: 1609 = "0"
  To: 1609 = ""1""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- From: 1400 = "0"
  To: 1400 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- From: 1200 = "0"
  To: 1200 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- From: 1405 = "0"
  To: 1405 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
- 1809 = "3"

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\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\4
- From: 1406 = "0"
  To: 1406 = ""3""

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\4
- From: 1609 = "0"
  To: 1609 = ""1""

To restore registry values this malware/grayware modified:

Open Registry Editor. To do this:
- On Windows 2000, XP, and Server 2003:
  Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
- On Windows Vista and 7:
  Click the Start button, type REGEDIT in the Search input field then press Enter.
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>0
In the right panel, locate the registry value:
1400 = "0"
Again In the right panel, locate the registry value:
1200 = "0"
Again In the right panel, locate the registry value:
1405 = "0"
Again In the right panel, locate the registry value:
1809 = "3"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1809 = "3"
Again In the right panel, locate the registry value:
1406 = "0"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Lockdown_Zones>0
In the right panel, locate the registry value:
1406 = "0"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>1
In the right panel, locate the registry value:
1400 = "0"
Again In the right panel, locate the registry value:
1200 = "0"
Again In the right panel, locate the registry value:
1405 = "0"
Again In the right panel, locate the registry value:
1809 = "3"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1809 = "3"
Again In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "1"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Lockdown_Zones>1
In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "1"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>2
In the right panel, locate the registry value:
1400 = "0"
Again In the right panel, locate the registry value:
1200 = "0"
Again In the right panel, locate the registry value:
1405 = "0"
Again In the right panel, locate the registry value:
1809 = "3"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1809 = "3"
Again In the right panel, locate the registry value:
1406 = "0"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Lockdown_Zones>2
In the right panel, locate the registry value:
1406 = "0"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>3
In the right panel, locate the registry value:
1400 = "0"
Again In the right panel, locate the registry value:
1200 = "0"
Again In the right panel, locate the registry value:
1405 = "0"
Again In the right panel, locate the registry value:
1809 = "3"
Again In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "3"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Lockdown_Zones>3
In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "3"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Zones>4
In the right panel, locate the registry value:
1400 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1400 = "3"
Again In the right panel, locate the registry value:
1200 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1200 = "3"
Again In the right panel, locate the registry value:
1405 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1405 = "3"
Again In the right panel, locate the registry value:
1809 = "3"
Again In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "3"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Lockdown_Zones>4
In the right panel, locate the registry value:
1406 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1406 = "3"
Again In the right panel, locate the registry value:
1609 = "0"
Right-click on the value name and choose Modify. Change the value data of this entry to:
1609 = "1"
Close Registry Editor.

Step 6

Search and delete these components

[ Learn More ]

There may be some components 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%\Remote\dmc01.dll
%User Profile%\Remote\dki
%User Profile%\Remote\dmc01_shrd
%User Temp%\zz1.tmp
%User Profile%\Remote\n.dat

Step 7

Search and delete this folder

[ 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\Remote

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_OTORUN.TFG. 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 this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

%User Profile%\Remote\p.dat
%User Profile%\Remote\io.dat
%User Profile%\Remote\pm.dat
%User Profile%\Remote\mc.dat
%User Profile%\Remote\lr.dat
%User Profile%\Remote\mxd1.txt
%User Temp%\zz2.tmp

Step 10

Restore these deleted registry keys/values from backup

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

In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup\Installed Components
- {4413F662-6095-4C7C-9A2F-41A33CD33BA1}

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WORM_OTORUN.TFG

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