WORM_AINSLOT.AH
VirTool:Win32/VBInject.QW (Microsoft); W32.Shadesrat (Symantec); Trojan.Win32.VB.aquz (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Worm/Generic2.AOBQ (AVG)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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.
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Windows Updat = "%User Profile%\Application Data\winupdat.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Windows Updat = "%User Profile%\Application Data\winupdat.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
StubPath = "%User Profile%\Application Data\winupdat.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
StubPath = "%User Profile%\Application Data\winupdat.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UACDisableNotify = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
Windows Updat = "%User Profile%\Application Data\winupdat.exe"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
T7EMBJOTYC = "bradly's Bot"
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
Restart in Safe Mode
Step 3
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\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer
- run
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup\Installed Components
- {BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID
- ID
Step 4
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
- Windows Updat = "%User Profile%\Application Data\winupdat.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Windows Updat = "%User Profile%\Application Data\winupdat.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
- StubPath = "%User Profile%\Application Data\winupdat.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components\{BC00AFED-AE83-50DC-3DE9-5DDBECBBDB1C}
- StubPath = "%User Profile%\Application Data\winupdat.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- UACDisableNotify = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
- EnableLUA = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run
- Windows Updat = "%User Profile%\Application Data\winupdat.exe"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID\ID
- T7EMBJOTYC = "bradly's Bot"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_AINSLOT.AH. 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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