TROJ_ADLOAD.JZ
TrojanDownloader:Win32/Adload (Microsoft); Downloader-CBG (McAfee); Downloader (Symantec); Trojan-Downloader.Win32.Adload.obx (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
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
773,132 bytes
EXE
No
17 Oct 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.
Other System Modifications
This Trojan deletes the following files:
- %User Profile%\Quick Launch\Internet Explorer.lnk
- %Start Menu%\Programs\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Internet Explorer.lnk
- %Desktop%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
(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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\strLink
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\appTitle
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\proRunNum
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
open\Command
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup
proRunNum = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup
pageID = "0"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
OpenHomePage\Command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\
OpenHomePage
Dropping Routine
This Trojan drops the following files:
- %User Temp%\ie.temp
- %Desktop%\Internet Explorer.lnk
- %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Internet Explorer.lnk
(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.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop 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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
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
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup
- strLink
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup
- appTitle
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup
- proRunNum
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell
- open
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\open
- Command
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup
- proRunNum = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup
- pageID = "0"
Step 4
Search and delete these components
- %User Temp%\ie.temp
- %Desktop%\Internet Explorer.lnk
- %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Internet Explorer.lnk
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_ADLOAD.JZ. 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 6
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%\Quick Launch\Internet Explorer.lnk
- %Start Menu%\Programs\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
- %Start Menu%\Internet Explorer.lnk
- %Desktop%\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
Step 7
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage
- Command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell
- OpenHomePage
Did this description help? Tell us how we did.