WORM_AGENT.JP
Worm:Win32/Autorun.AFV (Microsoft); PWS-Zbot.gen.aqv (McAfee); W32.Pilleuz (Symantec); Trojan.Win32.Ircbrute (Sunbelt); Trojan.Generic.KDV.655618 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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
Arrival Details
This worm 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 worm drops the following copies of itself into the affected system:
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\gwind.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It creates the following folders:
- %System Root%\RECYCLER
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = "%System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\gwind.exe"
Other System Modifications
This worm deletes the following files:
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\gwind.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
Name = "{malware file name}"
(Note: The default value data of the said registry entry is iexplore.exe.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
ID = "4fde738"
(Note: The default value data of the said registry entry is 41107b81.)
It deletes the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon\
{hifaggot}
Dropping Routine
This worm drops the following files:
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
This report is generated via an automated analysis system.
SOLUTION
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
Identify and delete files detected as WORM_AGENT.JP using either the Startup Disk or Recovery Console
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\Windows NT\CurrentVersion\Winlogon
- Taskman = "%System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\gwind.exe"
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_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
- From: Name = "{malware file name}"
To: Name = ""iexplore.exe""
- From: Name = "{malware file name}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
- From: ID = "4fde738"
To: ID = ""41107b81""
- From: ID = "4fde738"
Step 5
Search and delete this file
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini
Step 6
Search and delete these folders
- %System Root%\RECYCLER
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_AGENT.JP. 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 8
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.
- %System Root%\RECYCLER\R-1-5-21-1482476501-1644491937-682003330-1013\gwind.exe
Step 9
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_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
- {hifaggot}
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