WORM_SHAKBLAD.AS
VirTool:Win32/VBInject (Microsoft); Spyware.Perfect (Symantec); Worm.Win32.Shakblades.avi (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Keylogger.MWH (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
679,936 bytes
EXE
Yes
30 Jul 2012
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:
- %User Profile%\Application Data\00000000000000000000000000000033333333333333333333333333333222222222222222222222222222222222222222222666666666666666666666666666666666666999999999999999999999999999
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
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 = "{random characters}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
windows = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
StubPath = "{random characters}"
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
StubPath = "{random characters}"
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\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Active Setup\Installed Components\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
INSTALL\DATE
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\run
windows = "{random characters}"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
SrvID\ID
ZVKVKQILSU = "zzzzzzzzzz"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
INSTALL\DATE
ZVKVKQILSU = "January 30, 2012"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%System Root%\\{malware file name}.exe = "{random characters}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{random string} = "{random characters}"
This report is generated via an automated analysis system.
SOLUTION
9.200
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 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
- {8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup\Installed Components
- {8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID
- ID
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\INSTALL
- DATE
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 = "{random characters}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- windows = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
- StubPath = "{random characters}"
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components\{8B17D053-BDCE-AAED-BAAB-BAB8C0ACCFAD}
- StubPath = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run
- windows = "{random characters}"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\SrvID\ID
- ZVKVKQILSU = "zzzzzzzzzz"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\INSTALL\DATE
- ZVKVKQILSU = "January 30, 2012"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DoNotAllowExceptions = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %System Root%\{malware file name}.exe = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- {random string} = "{random characters}"
Step 5
Search and delete this folder
- %User Profile%\Application Data\00000000000000000000000000000033333333333333333333333333333222222222222222222222222222222222222222222666666666666666666666666666666666666999999999999999999999999999
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_SHAKBLAD.AS. 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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