TSPY_TEPFER.GGTX
PWS:Win32/Fareit (Microsoft); Generic.so (McAfee); Trojan.Zbot (Symantec); Trojan-PSW.Win32.Tepfer.ufyc (Kaspersky); Troj/MsilInj-CO (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse MSIL4.AIKE (AVG)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
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
389,120 bytes
EXE
No
18 Aug 2014
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.
Other System Modifications
This spyware modifies the following file(s):
- %Application Data%\GDIPFONTCACHEV1.DAT
(Note: %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.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\WinRAR
HKEY_LOCAL_MACHINE\software\microsoft\
windows\currentversion\Policies\
Explorer\Run
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
08A4EFD3640562F2578C94F1B5374B5F = "{random values}"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
GDIPlus
FontCachePath = "%Application Data%"
(Note: The default value data of the said registry entry is %User Profile%\Local Settings\Application Data.)
Dropping Routine
This spyware drops the following files:
- %User Temp%\179437.exe
(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.)
Other Details
This spyware connects to the following possibly malicious URL:
- {BLOCKED}.160.39
- {BLOCKED}6.33.4
- {BLOCKED}.201.122
- {BLOCKED}.197.229
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.700
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
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_LOCAL_MACHINE\software\microsoft\windows\currentversion\Policies\Explorer
- Run
Step 3
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\WinRAR
- HWID = "{random values}"
- In HKEY_CURRENT_USER\Software\WinRAR
- Client Hash = "{random values}"
- In HKEY_CURRENT_USER\Software\WinRAR
- 08A4EFD3640562F2578C94F1B5374B5F = "{random values}"
Step 4
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\Software\Microsoft\GDIPlus
- From: FontCachePath = "%Application Data%"
To: FontCachePath = ""%User Profile%\Local Settings\Application Data""
- From: FontCachePath = "%Application Data%"
Step 5
Search and delete this file
- %User Temp%\179437.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_TEPFER.GGTX. 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 7
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.
- %Application Data%\GDIPFONTCACHEV1.DAT
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