TSPY_KEYLOG.HZ
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.
TECHNICAL DETAILS
1,360,640 bytes
EXE
No
07 Nov 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 Temp%\_$Df
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Dropping Routine
This spyware drops the following files:
- %System Root%\dfinstall.log
- %User Temp%\_$Df\DF4_License.rtf
- %User Temp%\_$Df\DF4_Install.jpg
- %User Temp%\_$Df\DF4_Readme.rtf
- %User Temp%\_$Df\DepFrz.rdx
- %User Temp%\_$Df\FrzState.exe
- %User Temp%\_$Df\dfdiag.dll
- %User Temp%\_$Df\DF4_Help.rtf
- %User Temp%\_$Df\LogonDll.Dll
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
9.300
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Search and delete these components
- %System Root%\dfinstall.log
- %User Temp%\_$Df\DF4_License.rtf
- %User Temp%\_$Df\DF4_Install.jpg
- %User Temp%\_$Df\DF4_Readme.rtf
- %User Temp%\_$Df\DepFrz.rdx
- %User Temp%\_$Df\FrzState.exe
- %User Temp%\_$Df\dfdiag.dll
- %User Temp%\_$Df\DF4_Help.rtf
- %User Temp%\_$Df\LogonDll.Dll
Step 3
Search and delete this folder
- %User Temp%\_$Df
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_KEYLOG.HZ. 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.
Did this description help? Tell us how we did.