TSPY_TEPFER.AFP
PWS:Win32/Fareit (Microsoft); Trojan-PSW.Win32.Tepfer.faex (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
113,152 bytes
EXE
Yes
30 Jan 2013
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\Xuemof
(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%\Xuemof\adwe.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\WinRAR
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
It adds the following registry entries:
HKEY_CURRENT_USER\Software\WinRAR
HWID = "{random values}"
HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{random values}"
HKEY_CURRENT_USER\Software\WinRAR
553C110EFC5DE78D07D4049C2F090825 = "{random values}"
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\
Owsy
8ej39e0 = "{random values}"
HKEY_CURRENT_USER\Software\WinRAR
C6E695A0255F19507D034A0041FD96C4 = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
dc423ae = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
8ej39e0 = "558af"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
17239:UDP = "17239:UDP:*:Enabled:UDP 17239"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
22513:TCP = "22513:TCP:*:Enabled:TCP 22513"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
1j1ecjd8 = "R+xYUOzhMxm0hzQI?_CHAR(0x05)_lF????ame"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
jdh49fh = "{random characters}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
975f39 = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
jdh49fh = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
975f39 = "{random characters}"
HKEY_CURRENT_USER\Software\Microsoft\
Owsy
8ej39e0 = "Aa9YUA==??@"
It modifies the following registry entries:
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 Temp%\59218.exe
- %User Temp%\68656.exe
- %User Temp%\74312.exe
- %User Profile%\Application Data\Xuemof
- %User Profile%\Xuemof\adwe.exe
- %Application Data%\biij.udy
(Note: %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.. %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.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
Other Details
This spyware deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.300
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
Step 3
Delete this registry key
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
- WinRAR
- In HKEY_CURRENT_USER\Software\Microsoft
- Owsy
Step 4
Delete this registry value
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%\Xuemof\adwe.exe"
- In HKEY_CURRENT_USER\Software\WinRAR
- HWID = "{random values}"
- In HKEY_CURRENT_USER\Software\WinRAR
- Client Hash = "{random values}"
- In HKEY_CURRENT_USER\Software\WinRAR
- 553C110EFC5DE78D07D4049C2F090825 = "{random values}"
- 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\Owsy
- 8ej39e0 = "{random values}"
- In HKEY_CURRENT_USER\Software\WinRAR
- C6E695A0255F19507D034A0041FD96C4 = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- dc423ae = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- 8ej39e0 = "558af"
- 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
- 17239:UDP = "17239:UDP:*:Enabled:UDP 17239"
- 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
- 22513:TCP = "22513:TCP:*:Enabled:TCP 22513"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- 1j1ecjd8 = "R+xYUOzhMxm0hzQI?_CHAR(0x05)_lF????ame"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- jdh49fh = "{random characters}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- 975f39 = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- jdh49fh = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- 975f39 = "{random characters}"
- In HKEY_CURRENT_USER\Software\Microsoft\Owsy
- 8ej39e0 = "Aa9YUA==??@"
Step 5
Restore these modified registry values
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\Identities
- From: Last Username = "Main Identity"
To: Last Username = ""Main Identity""
- From: 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}""
- From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
- In HKEY_CURRENT_USER\Identities
- From: Identity Login = "9853"
To: Identity Login = ""98053""
- From: Identity Login = "9853"
- In HKEY_CURRENT_USER\Identities
- From: Identity Ordinal = "2"
To: Identity Ordinal = ""1""
- From: Identity Ordinal = "2"
Step 6
Search and delete these components
- %User Temp%\59218.exe
- %User Temp%\68656.exe
- %User Temp%\74312.exe
- %User Profile%\Application Data\Xuemof
- %User Profile%\Xuemof\adwe.exe
- %Application Data%\biij.udy
Step 7
Search and delete this folder
- %User Profile%\Application Data\Xuemof
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_TEPFER.AFP. 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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