WORM_SPYBOT.MY
Backdoor:Win32/Rbot.GI (Microsoft), W32.Spybot.Worm (Symantec), W32/IRCbot.gen (McAfee), Net-Worm.Win32.Kolabc.eua (Kaspersky)
Windows 2000, Windows XP, WindowsServer 2003
Threat Type: Worm
Destructiveness: No
Encrypted: No
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 creates the following folders:
- %System Root%\Documents and Settings\All Users\Application Data\TEMP
(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_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Update Machine = "{malware file name}.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Microsoft Update Machine = "{malware file name}.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
Microsoft Update Machine = "{malware file name}.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_CLASSES_ROOT\CLSID\{FC126597-E4D3-D0C3-52FA-F34D67341310}
HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent
Other Details
This worm connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}.1.48:8080
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
Restart in Safe Mode
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Microsoft Update Machine = "{malware file name}.exe"
- Microsoft Update Machine = "{malware file name}.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Microsoft Update Machine = "{malware file name}.exe"
- Microsoft Update Machine = "{malware file name}.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
- Microsoft Update Machine = "{malware file name}.exe"
- Microsoft Update Machine = "{malware file name}.exe"
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_CLASSES_ROOT\CLSID
- {FC126597-E4D3-D0C3-52FA-F34D67341310}
- In HKEY_LOCAL_MACHINE\SOFTWARE
- Licenses
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
- RFC1156Agent
Step 5
Search and delete this folder
- %System Root%\Documents and Settings\All Users\Application Data\TEMP
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SPYBOT.MY. 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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