WORM_AUTORUN.SLPS
Worm:Win32/Kufgal.B (Microsoft), Worm.Win32.AutoRun.doq (Kaspersky), W32.Mikbaland (Symantec), Mal/Basine-A (Sophos), W32/AutoRun.XDF!tr (Fortinet), Virus.Worm.Win32.AutoRun.doq (Ikarus),
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This worm arrives by connecting affected removable drives to a system. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
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
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It 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%\wuauc1t.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Propagation
This worm drops the following copy of itself in all physical and removable drives:
- explorer.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]
shell\open=´ò¿ª(&O)
shell\open\Command=explorer.exe
shell\open\Default=1
shell\explore=×ÊÔ´¹ÜÀíÆ÷(&X)
shell\explore\command=explorer.exe
SOLUTION
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
Identify and terminate files detected as WORM_AUTORUN.SLPS
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 3
Search and delete AUTORUN.INF files created by WORM_AUTORUN.SLPS that contain these strings
Step 4
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.SLPS. 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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