TROJ_ANTIAV.KZ
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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
265,728 bytes
EXE
No
18 Mar 2012
Arrival Details
This Trojan 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 Trojan creates the following folders:
- %System Root%\Documents and Settings\Wilbert
- %User Profile%\Application Data\Intel
- %User Profile%\Intel\Data
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Other System Modifications
This Trojan deletes the following files:
- %User Profile%\Intel\hloadl.dat
- %User Profile%\Intel\qqihdo.dat
- %User Profile%\Application Data\ITEUPATE.lnk
- %Common Startup%\ITEUPATE.lnk
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Common Startup% is the system's shared Startup folder, which is usually C:\Windows\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\All Users\Programs\Startup on Windows NT, and C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003.)
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Windows
LoadAppInit_DLLs = "1"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Windows
AppInit_DLLs = "%User Profile%\Intel\hloadl.dll"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\Adobe_Flash_Install.Dat
- %User Profile%\Intel\hjwe.dat
- %User Profile%\Data\Dtl.dat
- %User Profile%\Data\glp.uin
- %User Profile%\Intel\qqihdo.exe
- %User Profile%\Intel\hloadl.dll
- %User Profile%\Intel\qhnlc.dat
- %User Profile%\Intel\qqihdo.exd
(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.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows
- LoadAppInit_DLLs = "1"
Step 3
Restore this modified 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows
- AppInit_DLLs = "%User Profile%\Intel\hloadl.dll"
Step 4
Search and delete these files
- %User Temp%\Adobe_Flash_Install.Dat
- %User Profile%\Intel\hjwe.dat
- %User Profile%\Data\Dtl.dat
- %User Profile%\Data\glp.uin
- %User Profile%\Intel\qqihdo.exe
- %User Profile%\Intel\hloadl.dll
- %User Profile%\Intel\qhnlc.dat
- %User Profile%\Intel\qqihdo.exd
Step 5
Search and delete these folders
- %System Root%\Documents and Settings\Wilbert
- %User Profile%\Application Data\Intel
- %User Profile%\Intel\Data
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_ANTIAV.KZ. 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 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%\Intel\hloadl.dat
- %User Profile%\Intel\qqihdo.dat
- %User Profile%\Application Data\ITEUPATE.lnk
- %Common Startup%\ITEUPATE.lnk
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