1853.txt

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Rule:

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Sid:
1853

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Summary:
This event is generated when  an attacker attempts to connect to a 
Trinoo DDoS Trojan server.

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Impact:
Possible Distributed Denial of Service.

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Detailed Information:
This Trojan affects Windows and Linux operating systems:

Trinoo is used as a Distributed Denial of Service (DDoS) agent and can 
launch DDoS attacks from a large number of hosts against a target.

Due to the nature of this Trojan it is unlikely that the attacker's 
client IP address has been spoofed.

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Attack Scenarios:
This Trojan may be delivered to the target in a number of ways. This
event is indicative of an existing infection being activated. Initial
compromise may be due to the exploitation of another vulnerability.

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Ease of Attack:
This is Trojan activity, the target machine may already be compromised.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
Disallow Telnet access from external sources.

Use SSH as opposed to Telnet for access from external locations

Delete the Trojan and kill any associated processes.

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Contributors:
Original rule writer unknown
Sourcefire Vulnerability Research Team
Nigel Houghton <[e-mail]>

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Additional References:

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