WORM_AUTORUN.FBY
Worm:Win32/Autorun.RR (Microsoft); W32/Autorun.worm.h (McAfee); W32.SillyDC (Symantec); PAK:UPX, Worm.Win32.AutoRun.ftj, Worm.Win32.AutoRun.ftj (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Worm.Generic.75376 (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
273,575 bytes
EXE
No
04 Apr 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:
- %System Root%\RECYCLER
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other System Modifications
This worm deletes the following files:
- %System%\nod32krn.exe
- %Temp%\scs1.tmp
- %Temp%\scs2.tmp
- %Temp%\scs3.tmp
- %Temp%\scs4.tmp
- %Temp%\scs5.tmp
- %Temp%\scs6.tmp
(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.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
VB6 API Loader\AppSettings
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\mfncom.DLL
HKEY_CLASSES_ROOT\mfncom.MFNHTTPCtrl.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mfncom.MFNHTTPCtrl.1\CLSID
HKEY_CLASSES_ROOT\mfncom.MFNHTTPCtrl
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mfncom.MFNHTTPCtrl\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
mfncom.MFNHTTPCtrl\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}\TypeLib
HKEY_CURRENT_USER\software\MadeForNet\
HTTPDebuggerPro
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
VB6 API Loader\AppSettings
R1 = "400548"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
VB6 API Loader\AppSettings
R3 = "0"
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
VB6 API Loader\AppSettings
R2 = "2088"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\mfncom.DLL
AppID = "{6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
AppID = "{6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}\TypeLib
Version = "1.0"
HKEY_CURRENT_USER\Software\MadeForNet\
HTTPDebuggerPro
SN128226241 = "6A4F957C337473E1"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
UncheckedValue = "0"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
DefaultValue = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\SuperHidden
CheckedValue = "0"
Dropping Routine
This worm drops the following files:
- %System%\tmp980801.tmp
- %System Root%\autorun.inf
(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.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
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
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_CURRENT_USER\Software\VB and VBA Program Settings\VB6 API Loader
- AppSettings
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
- {6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
- mfncom.DLL
- In HKEY_CLASSES_ROOT
- mfncom.MFNHTTPCtrl.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mfncom.MFNHTTPCtrl.1
- CLSID
- In HKEY_CLASSES_ROOT
- mfncom.MFNHTTPCtrl
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mfncom.MFNHTTPCtrl
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mfncom.MFNHTTPCtrl
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {FD39B45D-9616-4615-8E68-D99FC6472C6C}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {73B91E0B-252F-4776-9766-18A8A8775788}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{73B91E0B-252F-4776-9766-18A8A8775788}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {8CFADADE-AF49-4E77-91EE-FE20037589C9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {1782E3A4-71BF-4B77-9B36-BC98CFD51C67}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}
- TypeLib
- In HKEY_CURRENT_USER\software\MadeForNet
- HTTPDebuggerPro
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\VB and VBA Program Settings\VB6 API Loader\AppSettings
- R1 = "400548"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\VB6 API Loader\AppSettings
- R3 = "0"
- In HKEY_CURRENT_USER\Software\VB and VBA Program Settings\VB6 API Loader\AppSettings
- R2 = "2088"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\mfncom.DLL
- AppID = "{6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD39B45D-9616-4615-8E68-D99FC6472C6C}
- AppID = "{6CBA02B2-40D4-4AF6-B2D6-7E5AD43439F9}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{8CFADADE-AF49-4E77-91EE-FE20037589C9}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1782E3A4-71BF-4B77-9B36-BC98CFD51C67}\TypeLib
- Version = "1.0"
- In HKEY_CURRENT_USER\Software\MadeForNet\HTTPDebuggerPro
- SN128226241 = "6A4F957C337473E1"
Step 4
Restore this modified 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\Explorer\Advanced\Folder\SuperHidden
- From: UncheckedValue = "0"
To: UncheckedValue = ""1""
- From: UncheckedValue = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
- DefaultValue = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
- CheckedValue = "0"
Step 5
Search and delete these files
- %System%\tmp980801.tmp
- %System Root%\autorun.inf
Step 6
Search and delete this folder
- %System Root%\RECYCLER
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.FBY. 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.
Step 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %System%\nod32krn.exe
- %Temp%\scs1.tmp
- %Temp%\scs2.tmp
- %Temp%\scs3.tmp
- %Temp%\scs4.tmp
- %Temp%\scs5.tmp
- %Temp%\scs6.tmp
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