WORM_AUTORUN.DLI
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Copies itself in all available physical drives, Propagates via removable drives
This worm arrives via removable drives.
It drops copies of itself in all removable and physical drives found in the system. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
TECHNICAL DETAILS
22,016 bytes
EXE
Yes
05 Aug 2010
Arrival Details
This worm arrives via removable drives.
Installation
This worm drops the following copies of itself into the affected system:
- %system%\vistaupgrade.exe
Propagation
This worm drops copies of itself in all removable and physical drives found in the system.
It drops the following copy(ies) of itself in all removable drives:
- a.exe
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
shellexecute=a.exe
action=Option folder to view files
shell\default=Open
shell\default\command=a.exe
shell=default
SOLUTION
8.900
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\\CurrentVersion\\Run
- VistaUpgrade=%system%\\vistaupgrade.exe
- VistaUpgrade=%system%\\vistaupgrade.exe
Step 3
Search and delete these files
- %System%\vistaupgrade.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.DLI . 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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