W32/Bagle-CY is a mass-mailing worm for the Windows platform.
When first run W32/Bagle-CY copies itself to <System>\sysformat.exe.
The following registry entry is created to run sysformat.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
sysformat
<System>\sysformat.exe
W32/Bagle-CY sets the following registry entries, disabling the automatic startup of other software:
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4
Note: disabling autostart for the SharedAccess service deactivates the Microsoft Internet Connection Firewall (ICF).
Registry entries are created under:
HKCU\Software\Microsoft\Params\