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Summary
Summary
Action- More Information
| How it spreads |
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|---|---|
| Affected operating systems | Windows |
| Characteristics |
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| Protection available since | 5 September 2007 15:12:14 (GMT) |
| Detected by | All Sophos products |
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Action
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More Information
W32/DelCyc-A is a worm with backdoor functionality for the Windows platform.
W32/DelCyc-A runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer.
W32/DelCyc-A may attempt to spread to removable storage devices by copying itself into [Device:]\recycled\sys.exe. The worm also creates autorun.inf on the removable storage devices containing a script that will automatically execute recycled\sys.exe when the device is connected to another computer.
When first run W32/DelCyc-A copies itself to <Windows>\Offline Web Pages\svchost.exe.
The file <Windows>\Offline Web Pages\svchost.exe is registered as a new system driver service named "SysSch", with a display name of "System Scheduler" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\SysSch
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