W32/SillyFD-AA is a worm for the Windows platform.
Once installed W32/SillyFD-AA spreads through removable storage devices, including floppy drives and USB keys. The worm attempts to create a hidden file Autorun.inf on the removeable drive and copy itself to the removeable drive with the hidden filename <Root>\handydriver.exe.
The file <Root>\Autorun.inf is designed to start the worm once the removable drive is connected to a uninfected computer.
W32/SillyFD-AA copies itself to the following locations:
<Root>\kerneldrive.exe
<Windows>\regedit.exe
<Windows>\pchealth\helpctr\Binaries\msconfig.exe
<System>\systeminit.exe
<System>\wininit.exe
<System>\winsystem.exe
<System>\cmd.exe
<System>\taskmgr.exe
W32/SillyFD-AA also creates the following file <Root>\autorun.inf.
The following registry entries are set to run W32/SillyFD-AA to run itself on startup:
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit
<System>\userinit.exe,<System>\systeminit.exe,
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
wininit
<System>\wininit.exe
The following registry entries are also set:
HKCU\Software\Microsoft\Internet Explorer\Main
Window Title
Hacked by 1BYTE
HKCU\Software\Microsoft
ServicePack
1.2
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
SearchHidden
0
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
SearchSystemDirs
0
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoFolderOptions
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegedit
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1
HKCU\Software\Microsoft
nFlag
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
Hidden
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
HideFileExt
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
ShowSuperHidden
0
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
SuperHidden
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoDriveTypeAutoRun
0
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
1