Rule:

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Sid:
144

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Summary:
This event is generated when an FTP login by user "w0rm" was attempted. 
This is an account used by the ADMw0rm-v1 worm.

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Impact:
Infected systems are left with a backdoor user account named 
"w0rm" and an email with the victims ip address is emailed to the worms 
creators.

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Detailed Information:
This worm exploits a vulnerability in BIND version 4.9.6 and is linux 
specific. These attempts mean the box has probably already been 
compromised.

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Affected Systems:
	Default installations of RedHat 4.0 to 5.2

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Attack Scenarios:
Standard Internet worm.

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Ease of Attack:
Simple.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
Upgrade BIND on vulnerable servers.

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Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Josh Sakofsky
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Additional References:

Arachnids:
http://www.whitehats.com/info/IDS01

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