Summary

Summary
Action
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| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Included in our products from | June 2007 (4.18) |
| Protection available since | 18 April 2007 20:14:46 (GMT) |
| Detected by | All Sophos products |
Action

Summary
Action
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Please follow the instructions for removing worms.
More Information
W32/Delbot-AL is a worm with backdoor functionality for the Windows platform.
W32/Delbot-AL spreads to other network computers by scanning network shares for weak passwords, and by exploiting common buffer overflow vulnerabilities, including:
- Symantec (SYM06-010)
- Microsoft Security Advisory (935964): Vulnerability in RPC on Windows DNS Server Could Allow Remote Code Execution.
W32/Delbot-AL runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer, and includes functionality to download, install and run new software.
When first run W32/Delbot-AL copies itself to <System>\cnen.exe and attempts to download a file to <Root>\site.exe. At the time of writing this downloaded file is detected as Troj/Delback-B.
The following registry entry is created to run cnen.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
nClient
<System>\cnen.exe
