TSPY_ZBOT.SMKS

This spyware 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.

File Size: 291,336 bytes

File Type: EXE

Memory Resident: Yes

Initial Samples Received Date: 26 Apr 2012

Arrival Details

This spyware 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 spyware creates the following folders:

%User Profile%\Application Data\Ocepyl
%User Profile%\Application Data\Azvye

(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.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{58C4EBA0-47A8-AD40-8C85-A85A94978B48} = "%User Profile%\Ocepyl\akeno.exe"

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Tavy

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Tavy
1i55e3i4 = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Tavy
1e83ec2a = "TMmKTBCitTA=?_CHAR(0x04)_?"

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

HKEY_CURRENT_USER\Software\Microsoft\
Tavy
1i55e3i4 = "4cefc92f"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
15975:UDP = "15975:UDP:*:Enabled:UDP 15975"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
27046:TCP = "27046:TCP:*:Enabled:TCP 27046"

HKEY_CURRENT_USER\Software\Microsoft\
Tavy
9hd1d2g = "WPfvTJXLjTDVCeN/_CHAR(0x10)__CHAR(0x05)_O_CHAR(0x08)_"

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

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

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

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

HKEY_CURRENT_USER\Software\Microsoft\
Tavy
1i55e3i4 = "4cefc96e"

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
Last Username = "Main Identity"

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

HKEY_CURRENT_USER\Identities
Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"

(Note: The default value data of the said registry entry is {C0FE0177-5693-4537-9331-A7402AD82D40}.)

HKEY_CURRENT_USER\Identities
Identity Login = "9853"

(Note: The default value data of the said registry entry is 98053.)

HKEY_CURRENT_USER\Identities
Identity Ordinal = "2"

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

Dropping Routine

This spyware drops the following files:

%User Profile%\Ocepyl\akeno.exe
%User Profile%\Azvye\ybtik.oso

(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.)

Other Details

This spyware deletes itself after execution.

This report is generated via an automated analysis system.

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\Microsoft
- Tavy

In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- Privacy

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
- {58C4EBA0-47A8-AD40-8C85-A85A94978B48} = "%User Profile%\Ocepyl\akeno.exe"

In HKEY_CURRENT_USER\Software\Microsoft\Tavy
- 1i55e3i4 = "{random values}"

In HKEY_CURRENT_USER\Software\Microsoft\Tavy
- 1e83ec2a = "TMmKTBCitTA=?_CHAR(0x04)_?"

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

In HKEY_CURRENT_USER\Software\Microsoft\Tavy
- 1i55e3i4 = "4cefc92f"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications = "1"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 15975:UDP = "15975:UDP:*:Enabled:UDP 15975"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications = "0"

In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 27046:TCP = "27046:TCP:*:Enabled:TCP 27046"

In HKEY_CURRENT_USER\Software\Microsoft\Tavy
- 9hd1d2g = "WPfvTJXLjTDVCeN/_CHAR(0x10)__CHAR(0x05)_O_CHAR(0x08)_"

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

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

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

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

In HKEY_CURRENT_USER\Software\Microsoft\Tavy
- 1i55e3i4 = "4cefc96e"

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:
{58C4EBA0-47A8-AD40-8C85-A85A94978B48} = "%User Profile%\Ocepyl\akeno.exe"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Tavy
In the right panel, locate and delete the entry:
1i55e3i4 = "{random values}"
Again In the right panel, locate and delete the entry:
1e83ec2a = "TMmKTBCitTA
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Privacy
In the right panel, locate and delete the entry:
CleanCookies = "0"
Again In the right panel, locate and delete the entry:
1i55e3i4 = "4cefc92f"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile
In the right panel, locate and delete the entry:
DisableNotifications = "1"
In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>SharedAccess>Parameters>FirewallPolicy>StandardProfile>GloballyOpenPorts>List
In the right panel, locate and delete the entry:
15975:UDP = "15975:UDP:*:Enabled:UDP 15975"
Again In the right panel, locate and delete the entry:
DisableNotifications = "0"
Again In the right panel, locate and delete the entry:
27046:TCP = "27046:TCP:*:Enabled:TCP 27046"
Again In the right panel, locate and delete the entry:
9hd1d2g = "WPfvTJXLjTDVCeN/_CHAR(0x10)__CHAR(0x05)_O_CHAR(0x08)_"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Internet Account Manager
In the right panel, locate and delete the entry:
Server ID = "4"
In the left panel, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>WAB>WAB4
In the right panel, locate and delete the entry:
FirstRun = "1"
Again In the right panel, locate and delete the entry:
OlkContactRefresh = "0"
Again In the right panel, locate and delete the entry:
OlkFolderRefresh = "0"
Again In the right panel, locate and delete the entry:
1i55e3i4 = "4cefc96e"
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
- 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: Last Username = "Main Identity"
  To: Last Username = ""Main Identity""

In HKEY_CURRENT_USER\Identities
- From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
  To: Last User ID = ""{C0FE0177-5693-4537-9331-A7402AD82D40}""

In HKEY_CURRENT_USER\Identities
- From: Identity Login = "9853"
  To: Identity Login = ""98053""

In HKEY_CURRENT_USER\Identities
- From: Identity Ordinal = "2"
  To: Identity Ordinal = ""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:
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:
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:
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:
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:
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>Identities
In the right panel, locate the registry value:
Last Username = "Main Identity"
Right-click on the value name and choose Modify. Change the value data of this entry to:
Last Username = "Main Identity"
Again In the right panel, locate the registry value:
Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
Right-click on the value name and choose Modify. Change the value data of this entry to:
Last User ID = "{C0FE0177-5693-4537-9331-A7402AD82D40}"
Again In the right panel, locate the registry value:
Identity Login = "9853"
Right-click on the value name and choose Modify. Change the value data of this entry to:
Identity Login = "98053"
Again In the right panel, locate the registry value:
Identity Ordinal = "2"
Right-click on the value name and choose Modify. Change the value data of this entry to:
Identity Ordinal = "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%\Ocepyl\akeno.exe
%User Profile%\Azvye\ybtik.oso

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\Ocepyl
%User Profile%\Application Data\Azvye

Step 8

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