WORM_DOWNAD.AE
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This worm may be dropped by other malware.
TECHNICAL DETAILS
72,704 bytes
DLL
Yes
28 Mar 2009
Arrival Details
This worm may be dropped by other malware.
Autostart Technique
This worm registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{Service Name}
Image Path = "%Windows%\System32\svchost.exe -k netsvcs""
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{Service Name}\ Parameters
ServiceDll = "{Malware path and file name}"
Other Details
This worm connects to the following URL(s) to get the affected system's IP address:
- http://checkip.dyndns.org
- http://{BLOCKED}p.co.uk
- http://www.{BLOCKED}p.org
SOLUTION
8.900
5.926.19
28 Mar 2009
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
Scan your computer with your Trend Micro product and note files detected as WORM_DOWNAD.AE
Step 3
Restart in Safe Mode
Step 4
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\SYSTEM\CurrentControlSet\Services
- {Service Name}
- {Service Name}
Step 5
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\Microsoft\Windows\CurrentVersion\Run
- {random characters} = "rundll32.exe {malware path and file name}, Parameter"
- {random characters} = "rundll32.exe {malware path and file name}, Parameter"
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_DOWNAD.AE. 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.
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